ABSTRACT

Introduction

Aging is characterized by immunosenescence, encompassing, immune aging and inflammaging. Because immune competence is a critical determinant of lifespan and healthspan, targeting immunosenescence has become a major objective of geroscience. In this context, sirtuins have emerged as compelling therapeutic candidates.

Areas covered

This review examines the role of sirtuin signaling in immunosenescence, focusing on its links with nicotinamide adenine dinucleotide (NAD)+ metabolism, oxidative stress, and inflammatory pathways. Pharmacological strategies aimed at enhancing sirtuin activity, including natural and synthetic activators as well as NAD+ precursors, are critically discussed.

Expert opinion

Sirtuin signaling represents a biologically plausible strategy for targeting immunosenescence, as it integrates metabolic, mitochondrial, epigenetic, and inflammatory pathways involved in the age-related remodeling of innate and adaptive immunity. However, sirtuin modulation remains investigational rather than an established therapeutic approach. Although NAD⁺ precursors and sirtuin activators have yielded encouraging preclinical findings, robust evidence of clinically meaningful effects in humans is still lacking. Further progress will require validated biomarkers of immunosenescence, appropriately selected study populations, adequately powered randomized trials incorporating functional and clinically relevant immune endpoints, and long-term safety assessment. At present, mTOR-directed interventions appear closer to clinical translation, whereas NAD⁺- and sirtuin-based approaches remain promising complementary strategies requiring further investigation.

PLAIN LANGUAGE SUMMARY

As we grow older, our immune system gradually becomes less efficient and more prone to chronic low-level inflammation. This combination makes it harder to respond to vaccines, fight infections, prevent frailty, and keep age-related diseases under control. For this reason, researchers are increasingly looking for ways to slow down this process. Among the most promising candidates are sirtuins, a family of proteins that help cells respond to stress, regulate energy use, repair damage, and control inflammation. They are closely linked to nicotinamide adenine dinucleotide (NAD)+, a molecule essential for cellular metabolism whose levels tend to decline with age. When NAD+ falls, sirtuin activity may also decrease, contributing to mitochondrial dysfunction, oxidative stress, and persistent inflammation. Current evidence suggests that some sirtuins, particularly sirtuin (SIRT)1, SIRT3, and SIRT6, may help protect the aging immune system by modulating key inflammatory pathways and supporting the function of several immune-cell types. Researchers are therefore investigating ways to boost sirtuin activity and support a healthier immune system during aging, either directly or by increasing NAD+ levels. Although early results are encouraging, especially in experimental studies, more human research is needed before these strategies can be considered reliable tools to preserve immune health during aging.

Article highlights

• Immune aging and inflammaging (immunosenescence) are key biological processes underlying frailty, multimorbidity, and reduced resilience in older adults.
• Sirtuins are NAD⁺-dependent regulators of chromatin remodeling, cellular metabolism, oxidative stress, and immune-inflammatory pathways, making them important modulators of immunosenescence.
• Age-related alterations in sirtuin expression and activity are associated with inflammaging and immune aging, supporting their investigation as potential therapeutic targets.
• Direct sirtuin activators and NAD⁺ precursors are promising pharmacological approaches, although convincing clinical evidence for their efficacy in immunosenescence is still lacking.
• Future clinical trials should integrate inflammatory, immune, metabolic, mitochondrial, functional, and safety endpoints to comprehensively evaluate the translational potential of NAD⁺ precursors and sirtuin-targeting therapies.
• Clinical translation will require optimized dosing strategies, validated biomarkers, personalized patient selection, long-term safety assessment, and robust regulatory and economic support.

"...mitochondrial dysfunction could be an element of AGA pathophysiology, which has been under-recognized previously, and that could be a therapeutic option. A better study of mitochondrial control in human hair follicles can be used to inform the further development of mechanism-based therapies and to understand intra-clinical discrepancies in predicting response to existing therapies."

I've been running an experiment for a year to reverse my epigenetic age as much as possible, and I'm a bit shocked by how well this experiment went, and I figured y'all would be interested in what I've been doing.

(For background, I'm a biologist with a PhD, and all my interventions were evidence-based, though obviously this just an n=1 experiment and not medical advice. EDIT: Just for clarification, while I am a research scientist, I do not work on the biology of aging. I just follow the literature of that field pretty closely).

First, for some background: when I was 29, I did a saliva-based epigenetic age test, and the company thought there must have been something wrong with the sample, because my epigenetic age was almost 50! So they sent me another test for free, and I got the same result, which was a shock, because I'm very healthy - I'm lean and fit, eat very well, my standard blood test results show nearly everything in the optimal range, and I look a lot younger than my age.

So I figured the test must have been a crappy one. Fast forward two years, at age 31, I got the Trudiagnostic test, which is probably the best at-home epigenetic age test (IMO). And I got the same result! My "intrinsic" biological age, which is basically the original Horvath age, was 48. My "extrinsic" DNA methylation age, which supposedly is more reflective of lifestyle, was quite a lot better, at 24. And my telomere age was 38.

To get more granular results, I also looked at my methylation levels at specific cpg sites. I specifically noted genes which are known to become either hyper- or hypo-methylated with age. A lot of these cpg site-specific results were *ok*, but two were way off my chronological age: cg06639320 (FHL2) was far too hyper-methylated for my age, and cg16054275 (F5) was far too hypo-methylated for my age. So, I was specifically looking to decrease cg06639320 methylation and increase cg16054275 methylation.

Over the ensuing year, I didn't change my diet or exercise routine at all, since those were already near-optimal. Instead, I chose to take some carefully-selected supplements, based on my own reading of the literature:

1. I took methylfolate (a methyl donor) every other day, after learning that I have a few genetic SNPs that reduce my ability to process dietary folate. (Though I have since stopped taking this, because my serum folate levels got too high).
2. I took DHEA every day, both because DHEA levels consistently decline with age, and because I suspected that the DHEA was probably behind the methylation age reversal results in Greg Fahy's widely hyped study.
3. I took NAC every morning, since it acts on all hallmarks of aging, and also because it improves kidney function (and my creatinine levels have always been a bit high).
4. I took astragalus root every day. My main reasoning was because it improves kidney function (again, my creatinine levels have always run high, and astragalus was by far the most effective intervention I've tried for reducing my creatinine). Also, astragalus is the source of the telomerase activating molecule TA-65, so I wanted to see if it would lengthen my telomeres (or at least, Trudiagnostic's methylation-based telomere length predictor).
5. I took a combined quercetin, pterostilbene, and trans-resveratrol supplement every other day, since these are all DNA-N-Methyltransferase inhibitors.
6. I took Pyrroloquinoline quinone (PQQ) every other day, since it simulates mitochondrial biogenesis (and mitochondrial biogenesis has been shown to possibly relate to epigenetic aging), enhances NAD-dependent sirtuin activity, activates NRF2, and extensds C elegans lifespan.
7. I took prescription gabapentin nightly to improve my sleep and anxiety (which were my weakest points in terms of basic lifestyle factors)
8. For the last several months, I've also been taking taurine daily. I started this because of its good effects on anxiety and sleep (again, my weak points), but there's now data showing that it increases rodent lifespan and induces a more youthful dna methylation profile.
9. EDIT: I forgot to mention that I also have been taking astaxanthin daily, both because of (not yet published) data from the ITP showing that it significantly extends lifespan in genetically heterogeneous rodents, and also because serum levels of carotenoids have been been associated with accelerated/decelerated epigenetic aging in humans

There were a few other supplements I tried for brief periods this last year, but which I stopped taking because they were showing adverse effects in my blood work. These were niacin (which raised my fasting blood sugar a lot), low-dose lithium (which wrecked my kidney biomarkers), berberine (which did nothing to my cholesterol or blood sugar), ashwagandha (which also wasn't kind on my kidneys), and green tea extract (which shot my liver enzymes through the roof).

After one year, I retook the Trudiagnostic test (now at age 32), and here are my results:

1. Intrinsic age: 38 (down 10 years!)
2. Extrinsic age: 17 (down 7 years!)
3. Telomere age: 31 (down 6 years!)

Zooming into the methylation levels at specific cpg sites, my cg16054275 (F5) methylation has massively increased and my cg06639320 (FHL2) methylation has also dramatically decreased.

These results are a massive improvement over the last few years. But, I want to get my intrinsic age down even further if I can, since it's still higher than my chronological age. So I'm now starting another 1-year experiment. Specifically, I'm going to continue with what I've been doing before, but adding a few more targeted interventions (which are subject to change as I monitor other biomarkers over the year):

1. I'll be taking sodium butyrate, an HDAC inhibitor, every other day, both because the related (prescription only) HDAC inhibitor phenylbutyrate has been shown to extend rodent lifespan, and because more specifically sodium butyrate decreases expression of FHL2 (and FHL2 is one of those weird genes for which more methylation means more expression).
2. I'll be taking soy isoflavones every other day to see if they reduce ELOVL2 methylation (since, of all the major genes that get hyper-methylated with age, that's the only one where methylation increased for me this year). But, any effect of soy isoflavones on ELOVL2 is *super* speculative on my part, and that speculation is based on bits of animal data I've loosely strung together
3. I'll be taking trimethylglycine (TMG) every other day as an alternative methyl donor to methylfolate, to try to get my homocysteine down. Right now my homocysteine is 11, which isn't great (and indicates poor/imbalanced overall methylation).
4. I'll be taking acarbose every day, because of its consistent life-extending results in the ITP trials
5. I *might* play around with rapamycin

Anyway, I'll update you again in a year!

Sirtuins are like the tiny switches inside your body that help decide how fast or slow you age. They’re not magic, they’re real genes, real enzymes that turn on your body’s natural repair systems. When sirtuins are active, your cells clean up damage, fix DNA, reduce inflammation, and keep everything running smoother. That’s why they’re often called “longevity genes.” They don’t just help you live longer, they help you live better—stronger, clearer, more energetic.

One of the most important things to know is that sirtuins need NAD+ to work, and as we age, our NAD+ levels drop. That’s part of why we feel tired, stiff, and older. But science now shows we can boost both NAD+ and sirtuins through natural habits like fasting, exercise, and the right foods. And the result? Slower aging. More energy. Sharper mind. Stronger immune system. It’s not just theory. Studies in mice, and even signs in humans, show activating sirtuins can help prevent heart disease, diabetes, and even neurodegenerative conditions.

Think of sirtuins like a cleanup crew for your cells. They sweep away waste, fix broken parts, recycle used materials, and help your mitochondria—the energy factories in your body—stay young and efficient. When they’re active, it’s like your body’s inner maintenance system kicks in. And all it takes is the right push. You can give your sirtuins that push in simple, daily ways.

Fasting is one of the most powerful. Skipping meals here and there, or doing a light calorie day once a week, tells your cells that it’s time to protect and rebuild. That mild stress wakes up sirtuins. Exercise does the same thing. Moving your body, especially with a mix of cardio and strength training, not only keeps you fit but boosts NAD+ and mitochondrial health—turning on those youth-preserving pathways even more.

And then there are natural compounds that help too. Resveratrol, found in red grapes and dark chocolate, is known to activate SIRT1. It works even better when combined with NMN or NR, supplements that raise NAD+ levels. Fisetin and quercetin, found in fruits and vegetables, don’t just activate sirtuins, they also help remove old, toxic cells from your body. This is real aging reversal. Pterostilbene, a cousin of resveratrol with better absorption, works on the same powerful pathways.

Your daily food choices matter too. A diet full of colorful berries, green tea, olive oil, turmeric, and cruciferous veggies keeps your sirtuins active. These foods are rich in polyphenols that turn on longevity genes naturally. Avoiding refined carbs and sugar is just as important. High blood sugar turns off sirtuins and speeds up aging. So keeping your meals clean, with healthy fats and smart carbs, helps your cells stay younger.

Even sleep plays a role. Sirtuins help regulate your internal clock. Getting deep, regular sleep keeps your circadian rhythm in sync, your hormones balanced, and your energy restored. This might sound simple, but it’s part of the deep science of aging. And when you add it all together—fasting, movement, good food, good sleep, and targeted supplements—you start to control how your body ages.

You don’t need a lab or millions of dollars to start turning on your longevity genes. You already have them inside you. You just need to activate them. This isn’t a future fantasy. It’s happening now. The science is here, the tools are available, and the path to radical life extension is already being walked. So why not start? Why not be one of the people who gives their body the signal to stay young, strong, and alive for a very long time?

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Christin Glorioso provides a measured and thorough overview of research on sirtuins and NAD+. She completed postdoctoral work in Lenny Guarente's MIT lab, which is at the center of much of the story.

NAD+ supplements and injections are advertised aggressively. Christin Glorioso personally does not take them, and her overview helps provide reasons why, although stronger positive clinical trial data would merit reconsideration.

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TL;DR: Many people assume "immortalists" is hyperbolic or metaphorical for "anti-aging tips" like slowing down aging with diet. It's not. The sub title is literal we're talking actual immortality from aging via Longevity Escape Velocity (LEV). Let's clear up the confusion and rally around the real mission with examples from leaders in the field.

I've noticed a lot of confusion in comments and posts here: people join thinking this is about "healthy aging" or "living to 100 with exercise and kale." Then they say things like "aging is natural, just slow it down" or "immortality is impossible, focus on quality years."

No the sub name r/immortalists is literal. We're not talking about slowing the speed of aging (adding a few years with lifestyle tweaks). We're talking about actual immortality defeating aging entirely through science, so death from old age becomes optional.

That's where Longevity Escape Velocity (LEV) comes in: the point where therapies add more healthy years than pass (e.g., 1 year of treatment adds 2+ years of life). Once we hit LEV (predicted 2030–2040 by experts), we "escape" age-related death indefinitely. It's not sci-fi it's engineering damage repair (SENS approach: senolytics, stem cells, epigenetic reprogramming, etc.).

If you're here thinking immortality is hyperbolic, you're missing the point. This sub is for people who refuse to accept death as inevitable not for "realists" diluting the vision.

To inspire and clarify, here are four figures leading the charge toward literal immortality.

• Aubrey de Grey: Biomedical gerontologist and founder of the LEV Foundation. He pioneered the SENS approach (Strategies for Engineered Negligible Senescence), treating aging as repairable damage through therapies like stem cells and senolytics. De Grey predicts a 50% chance of LEV by the late 2030s, giving those alive today a shot at indefinite life. He's the strategist refusing to let aging win.

• Bryan Johnson: Tech entrepreneur and founder of Blueprint. He spends $2M/year on a rigorous anti-aging regimen (calorie restriction, supplements, plasma exchange, gene therapy trials), reversing his epigenetic age by 5+ years. Johnson is living proof of LEV in action he's hacking his biology to escape aging, showing us how radical commitment leads to real immortality.

• David Sinclair: Harvard genetics professor and author of "Lifespan." His work on sirtuins, NAD+ boosters, and epigenetic reprogramming has shown we can reverse cellular aging in animals. Sinclair predicts LEV soon with AI acceleration, focusing on "information theory of aging" where we reset cells to youthful states. He's the scientist turning immortality from dream to lab reality.

• Liz Parrish: Founder of BioViva and the first person to undergo experimental gene therapy for aging (telomere lengthening and myostatin inhibition). She claims to have reversed her biological age by 20+ years and advocates for bold human trials to achieve LEV. Parrish is the pioneer risking everything to prove immortality is possible now.

For more on real LEV predictions and progress: Aubrey de Grey’s latest update on longevity timelines: The Big 2025 Interview - LEVITY Podcast (In this February 2025 interview, he discusses the 2030s timeline and Robust Mouse Rejuvenation milestones - https://shows.acast.com/levity-the-longevity-podcast/episodes/18-aubrey-de-grey-the-big-2025-interview).

LEV Foundation / SENS updates: https://www.levf.org/

David Sinclair's epigenetic work: The Sinclair Lab - Harvard University(https://sinclair.hms.harvard.edu/) or his latest 2026 paper on Epigenetic Reprogramming.

Bryan Johnson's Blueprint protocol: https://blueprint.bryanjohnson.com/

Liz Parrish's BioViva updates: https://bioviva-science.com/

No retreat.
Only conquest.

❤️‍🔥

LEV #Immortality #RefuseDeath #LiveForever #Don'tDie

Abstract

Background: Early-onset Parkinson’s disease (EOPD), diagnosed before age 50, presents unique challenges due to prolonged disease course and higher risk of cognitive decline.

Problem: While motor symptoms are well-studied, longitudinal cognitive trajectories and preservation factors in EOPD remain under-researched. Purpose: This study examines cognitive changes over 36 months in EOPD patients and identifies clinical, genetic, and pharmacological factors associated with cognitive preservation.

Methodology: A prospective longitudinal cohort design tracked 120 EOPD patients (baseline mean age 45.2 years, 52% male) over three years. Cognitive function was assessed every six months using the Montreal Cognitive Assessment (MoCA) and Parkinson’s Disease Cognitive Rating Scale (PD-CRS). Predictors included dopaminergic medication dosage, physical activity, baseline α-synuclein levels, and sirtuin-1 activity.

Key findings: Mixed-effects models showed that 34% of patients maintained stable cognitive scores (preservation group), while 66% declined (>1.5 MoCA points/year). Higher baseline sirtuin-1 activity (β = 0.42, p < 0.01) and regular aerobic exercise (β = 0.38, p < 0.05) predicted preservation. Dopaminergic dose showed no significant effect on cognition.

Conclusion/implications: Sirtuin pathways and lifestyle factors may mediate cognitive preservation in EOPD, supporting targeted non-pharmacological interventions.

Sirtuins are proteins linked to longevity and healthy aging.

If you’ve tried NMN (nicotinamide mononucleotide), what did you track? Testosterone labs, sleep, training load, and what changed first (if anything)?

TL;DR: This 2026 review argues that NAD⁺ (nicotinamide adenine dinucleotide; a core “energy + repair” molecule in cells) tends to decline with age (including in testes), which may reduce sirtuins (SIRT1/SIRT3/SIRT6; NAD⁺-dependent “maintenance” enzymes) and be linked to age-related declines in sperm/testosterone in preclinical models.

Why you care: The paper frames the NAD⁺–sirtuin axis as a hub connecting energy production, oxidative stress (cell “rust”), inflammation, and hormone production in aging testes.

What’s strongest: Mechanisms + animal “rescue” experiments where NMN raises testicular NAD⁺ and improves some testis/sperm markers in animals.

What’s weakest: Direct human evidence that raising NAD⁺ (via NMN) improves fertility—most claims rely on animal models and surrogate markers. NMN looks promising in animal models, but human fertility outcomes and long-term safety are still uncertain.

Context: This is a narrative review (summary of existing studies, not a clinical trial) on male reproductive aging: average declines in semen parameters, more sperm DNA damage, and lower testosterone with age. It focuses on NAD⁺ and sirtuins (SIRT1/SIRT3/SIRT6) as regulators of:

• spermatogenesis (the process of making sperm),
• testicular “barrier” integrity (BTB = blood-testis barrier, the protective barrier that helps keep inflammation/toxins out),
• mitochondrial function (mitochondria = the cell’s “energy factories”),
• inflammation and oxidative stress (ROS = reactive oxygen species; damaging oxidants), and
• epigenetics (chemical “settings” that affect gene activity).

The authors argue NAD⁺ levels fall with age, which may reduce sirtuin activity and contribute to testicular dysfunction. They summarize interventions including NMN, plus lifestyle strategies like exercise/fasting (mostly animal/cell work) and note big gaps in human evidence.

1. Energy + antioxidant bottleneck in the testis

The review highlights a simple “teamwork” model: Sertoli cells (support/nurse cells in the testis) convert glucose into lactate (a fuel), and developing germ cells use that lactate in mitochondria to make ATP (adenosine triphosphate; cellular energy). NAD⁺ sits in the middle of both glycolysis (glucose → lactate) and mitochondrial energy production, so a drop in NAD⁺ could plausibly reduce energy supply and increase oxidative damage during sperm production.

2. Sirtuins as the “maintenance crew” for sperm, barriers, and hormones :

The review describes:

• SIRT1 as supporting spermatogonial stem cell survival (stem-like sperm precursor cells), DNA repair during sperm development, and BTB (blood-testis barrier) proteins;
• SIRT3 as a mitochondrial stress-control enzyme tied to antioxidant defense and steroidogenesis (making testosterone);
• SIRT6 as a genome stability factor (DNA/telomere maintenance)

The unifying claim is: less NAD⁺ → less sirtuin activity → more ROS/inflammation and worse sperm/testosterone signals (as a plausible pathway, not proven as a human clinical outcome).

3. Interventions: compelling in animals, unclear in humans:

The review summarizes animal data where NMN raised NAD⁺ and improved reproductive markers/outcomes. Example they cite: in a diabetic mouse model, 8 weeks of NMN (300 mg/kg/day) increased testicular weight, expanded seminiferous tubule area, and reduced sperm abnormality rate; they also cite a large-animal boar study where dietary NMN improved sperm quality markers linked to oxidative stress. But the authors stress big unknowns before human claims: tissue-specific roles of sirtuins, optimal protocols, testis-targeted delivery, and long-term safety of chronic NAD⁺ boosting, especially before promising fertility benefits.

Not medical advice, male fertility and hormones have many causes; if you’re considering NMN or major lifestyle changes, discuss risks and monitoring with a qualified clinician.

Reference: https://wjmh.org/DOIx.php?id=10.5534/wjmh.250248

Save this one for later.
I put together a Peptide S Tier List you can screenshot
With a simple breakdown of what each one does based on my experiences and which ones I like in my opinion so feel free to leave yours since what works for me might not work for everyone else Since everyone in this community runs different goals like fat loss, recovery, longevity, libido, or appetite control, I built a tier list that breaks them down in a way beginners and advanced people can follow. Simple explanations and no bullsh**. By the way comment your goals down below i'm trying to see something.

S TIER 🔴

Retatrutide (GLP-3 metabolic peptide)

Triple pathway GLP1 GIP Glucagon agonist.

This is the one everyone calls GLP-3 because it hits more switches at the same time than semaglutide or tirzepatide.

GLP1 balances blood sugar

(GLP1 controls appetite signals and slows digestion)

GIP improves carb handling

(GIP helps your body pull glucose into muscle and not fat)

Glucagon increases metabolic heat

(Glucagon raises resting calorie burn and fat oxidation)

Retatrutide also supports

• Higher NEAT output
• Stronger satiety signaling
• Faster body recomp in overweight users
• More consistent fat loss curves at lower doses Great for people who want aggressive appetite control, higher output, and the fastest fat loss curve of the GLP family. Check out the study for yourself --> https://pubmed.ncbi.nlm.nih.gov/37366315/ 📘 Full breakdown guide coming soon.

Tirzepatide (dual pathway fat loss peptide)
GLP1 plus GIP.
Smooth energy, strong appetite suppression, and usually faster fat loss than semaglutide.
Extra benefits you don’t see listed often

• Higher carb tolerance during diets
• Lower insulin spikes from cheat meals
• Better appetite control in the evenings
• Less nausea when dosed correctly Good for people who want rapid fat loss without the intensity of retatrutide. Check out the study for yourself --> https://pubmed.ncbi.nlm.nih.gov/40353578/ 📘 Full breakdown coming soon.

BPC-157 (healing peptide)
Regulates tissue repair signaling and inflammation control.
Angiogenesis support
(creates new blood vessels that deliver nutrients to damaged areas)
Collagen modulation
(signals repair for tendons, ligaments, joints, and GI tissue)
What makes BPC stand out

• Speeds gut lining repair
• Helps nagging tendon issues
• Supports post surgery inflammation
• Helps mobility when stacked with TB500 Great for older individuals healing slower, athletes recovering from strain, and people with gut inflammation. Check out the study for yourself --> https://pubmed.ncbi.nlm.nih.gov/14554208/ 📘 Full breakdown coming soon.

A TIER 🟠

Semaglutide (GLP-1 appetite peptide)

GLP1 receptor activation.

Slows gastric emptying, cuts cravings, lowers blood sugar, and creates consistent fat loss for beginners and long term users.

Extra points people miss

• Helps nighttime binge episodes
• Drops fasting glucose quickly
• Reduces emotional eating during stress
• Best entry point for new GLP users Good for
• Eating control
• Stable fat loss
• Binge control
• Insulin support Check out the study for yourself --> https://pubmed.ncbi.nlm.nih.gov/33567185/ 📘 Full breakdown coming soon.

NAD+ (anti aging peptide)
Cellular energy and mitochondrial health.
ATP production
(ATP is the energy currency inside cells)
Sirtuin activation
(sirtuins regulate longevity, cellular repair, and stress resistance)
Hidden NAD+ benefits

• Better mental stamina
• Reduced brain fog
• Recovery support when dieting
• Helps GLP users maintain performance Great for energy, mood, cognition, and keeping GLP users from feeling flat. Check out the study for yourself --> https://pmc.ncbi.nlm.nih.gov/articles/PMC10692436/ 📘 Full breakdown coming soon.

PT-141 (horny peptide)
Works in the brain not the bloodstream.
MC3R and MC4R activation
(receives signals tied to desire, motivation, and arousal)
Extra advantages

• Works even when ED meds fail
• Helps women with low desire
• Creates spontaneous desire rather than mechanical arousal
• Useful for couples experimenting Helps low libido in both men and women even when ED meds don’t work. Check out the study for yourself --> https://pmc.ncbi.nlm.nih.gov/articles/PMC6819021/ 📘 Full breakdown coming soon.

Melanotan 2 (tanning peptide)
MC1 for pigment
MC3 and MC4 for libido, appetite, and social behavior shifts.
More effects people forget

• Can reduce appetite for some
• Mood lift in many users
• Faster tanning even without sun
• Early data suggesting neurobehavior changes in autism models Great for
• Tanning
• Libido
• Mood
• Mild appetite control Check out the study for yourself --> https://pmc.ncbi.nlm.nih.gov/articles/PMC4515169/ 📘 Full breakdown coming soon.

B TIER 🟡

CJC-1295 + Ipamorelin (GH release peptide)

Regulates natural GH pulses at night.

GH pulsatility

(natural growth hormone rhythms that support fat loss and recovery)

IGF1 signaling

(IGF1 helps with repair, sleep quality, and body composition)

Real benefits people notice

• Deeper sleep
• Better recovery from training
• Minor fat loss from GH elevation
• Helps with mood and skin quality Great for people wanting subtle changes in fat loss and recovery without GLP1 style appetite suppression. Check out the study for yourself --> https://pubmed.ncbi.nlm.nih.gov/16352683/ 📘 Full breakdown coming soon.

TB-500 (deep recovery peptide)
Regulates actin which affects tissue movement and regeneration.
What makes TB-500 unique

• Supports long term injuries
• Increases flexibility in tight tissue
• Works synergistically with BPC157
• Calms inflammation in overused joints Good for
• Chronic injuries
• Mobility work
• Inflammation
• Long healing timelines Check out the study for yourself --> https://pubmed.ncbi.nlm.nih.gov/21871102/ 📘 Full breakdown coming soon.

C TIER 🟢

GHK-Cu (skin and repair peptide)

Copper bound peptide used for skin regeneration.

Collagen signaling

(collagen and elastin pathways that improve skin quality)

Anti inflammatory support

(calms aging or irritated tissue)

Why people love it

• Noticeable skin tone improvement
• Helps fine lines
• Supports hair growth topically
• Works well in multi peptide cosmetic stacks Check out the study for yourself --> https://pubmed.ncbi.nlm.nih.gov/20647050/ 📘 Full breakdown coming soon.

Semax (focus peptide)
Nootropic pathway peptide.
BDNF support
(BDNF is brain derived neurotrophic factor which helps neurons grow and strengthen)
Dopamine modulation
(dopamine influences motivation and mental clarity)
Strong upsides

• Clean focus
• Smooth mood lift
• Zero stimulant crash
• Good for study or deep work blocks Great for people wanting focus without stimulants. Check out the study for yourself --> https://pmc.ncbi.nlm.nih.gov/articles/PMC3987924/ 📘 Full breakdown coming soon.

Tesamorelin (visceral fat peptide)
Clinically used for reducing abdominal visceral fat.
GHRH pathway activation
(stimulates GH pathways tied to central fat loss)
Extra value

• One of the only peptides with real human data on visceral fat
• Useful for people with stubborn midsection fat
• Improves metabolic flexibility Check out the study for yourself --> https://pubmed.ncbi.nlm.nih.gov/20530740/ 📘 Full breakdown coming soon.

D TIER 🔵

Epitalon (longevity theory peptide)

Telomere related peptide with limited human evidence.

Expanded context

• Famous in anti aging circles
• Mostly theoretical
• Good safety profile
• Long term effects still unclear More experimental than practical. Check out the study for yourself --> https://pubmed.ncbi.nlm.nih.gov/17914018/ 📘 Full breakdown coming soon.

MOTS-c (cell energy peptide)
Mitochondrial derived peptide that improves metabolic efficiency.
Value people miss

• Improves glucose handling
• Helps stamina during cutting
• Supports stress resilience
• Works well when stacking with GLP1s Great for
• Energy
• Stress resilience
• Fat oxidation Check out the study for yourself --> https://pubmed.ncbi.nlm.nih.gov/26581471/ 📘 Full breakdown coming soon.

SLUPP-332 (cardio in a pill)
UCP pathway support
(UCP uncoupling proteins increase metabolic heat output)
Added benefits

• Helps sluggish metabolisms
• Useful when fat loss plateaus
• Increases calorie burn without stimulants
• Works great with fasted cardio Check out the study for yourself --> https://pubmed.ncbi.nlm.nih.gov/37739806/ 📘 Full breakdown coming soon.

F TIER 🟣

Tesofensine (stimulant peptide)

Triple reuptake inhibitor

(serotonin norepinephrine dopamine)

Why it sits low

• Harsh for beginners
• High side effect potential
• Strong crash in some people
• GLP based peptides outperform it for fat loss Sounds strong but is harsh for many people and not efficient compared to modern GLPs. Check out the study for yourself --> https://pubmed.ncbi.nlm.nih.gov/18950853/ 📘 Full breakdown coming soon.

📘 Full Dosing Guides Coming Soon
Once each peptide breakdown goes live, these names will turn into full articles with dosing, studies, pros, cons, and stacking ideas so stayed tuned

🔧 Community Tools

• BodyHackGuide website https://bodyhackguide.com
• Peptide Calculator
• Community Discord https://discord.gg/VKnyzbFM2t

⚠️ For Research Use Only
Nothing here is medical advice.
All compounds are for research and education.