Longevity: Anti-Aging Peptides, Supplement Stack & Biological Age Markers

The short version

Longevity isn't a single compound. It's metabolic health, low inflammation, preserved muscle mass, sleep quality, and a handful of compounds with research-grade evidence for slowing biological aging. The protocol on this page is built from peer-reviewed research on NAD+ precursors, sirtuin activators, mitochondrial peptides, and the biomarkers that actually correlate with all-cause mortality.

Why this protocol works

The longevity foundation is unglamorous: NMN (NAD+ precursor with strong published RCT data), resveratrol (sirtuin activation, requires fat for absorption), vitamin D3 + K2 (cardiovascular + bone + immune), omega-3 EPA/DHA (target Omega-3 Index 8–12% per Framingham data), and magnesium glycinate. Berberine cycled 8 weeks on / 4 weeks off provides AMPK activation similar to metformin without the prescription.

Epithalon is the most-researched longevity peptide - published Russian data going back to the 1980s shows telomere elongation in human studies. MOTS-c is the mitochondrial peptide that's emerged in the last decade with strong metabolic-health data. GHK-Cu has published cellular-rejuvenation data and is in the longevity protocol of multiple respected clinicians.

The biomarkers that predict longevity outcomes - independent of chronological age - are ApoB (cardiovascular), HbA1c + fasting insulin (metabolic), hs-CRP (inflammation), homocysteine (cognitive + cardiovascular), albumin (nutritional/inflammatory), and biological-age markers like the PhenoAge composite. These are the panel any longevity-focused user should track quarterly.

Deep Dive

What biological aging actually is: the hallmarks framework

The most useful mental model for a longevity protocol comes from a single landmark paper: Lopez-Otin and colleagues, "The Hallmarks of Aging" (Cell, 2013), expanded to twelve hallmarks in a 2023 update. Aging is not one process. It is a set of interacting cellular failures: genomic instability, telomere attrition, epigenetic drift, loss of protein quality control, disabled autophagy, deregulated nutrient sensing, mitochondrial dysfunction, cellular senescence, stem-cell exhaustion, altered intercellular signaling, chronic low-grade inflammation ("inflammaging"), and gut dysbiosis.

This framework explains why no single compound is a longevity strategy. Each intervention touches only a subset of hallmarks. NAD+ precursors act mainly on mitochondrial function and nutrient sensing. Resistance training works against stem-cell exhaustion and muscle loss. Anti-inflammatory work lowers inflammaging. A coherent protocol is one that covers several hallmarks at once, which is the mechanistic reason the unglamorous foundations do more measurable work than any exotic addition.

The nutrient-sensing pathways that sit underneath everything

Four signaling systems govern the trade-off between growth and cellular maintenance, and nearly every longevity compound acts on one of them: mTOR, AMPK, the sirtuins, and insulin/IGF-1 signaling.

mTOR drives growth and protein synthesis when nutrients are abundant. AMPK is the low-energy sensor that switches on autophagy, the cell's recycling and clean-up program. Sirtuins are NAD+-dependent enzymes involved in DNA repair and metabolic regulation, which is why NAD+ availability, and its decline with age, is an active area of study. The insulin/IGF-1 axis ties the whole system back to metabolic health.

The most robust experimental evidence here comes from the NIA Interventions Testing Program, which tests compounds for lifespan effects in genetically diverse mice across independent labs. Rapamycin, an mTOR inhibitor, is the strongest positive result to date (Harrison et al., Nature, 2009), with acarbose and 17-alpha-estradiol also extending lifespan in that program. That is educational context on pathway biology, not a protocol recommendation. AMPK activation (the mechanism behind berberine and metformin) and caloric restriction converge on the same growth-versus-maintenance balance.

Reading biological-age markers: clocks and function tests

Biological-age tracking splits into two categories, and confusing them is common.

Molecular clocks estimate age from DNA methylation patterns. The first was Horvath's clock (Genome Biology, 2013). More predictive successors followed: PhenoAge (Levine et al., Aging, 2018), GrimAge (Lu et al., Aging, 2019), and DunedinPACE (Belsky et al., eLife, 2022). DunedinPACE is distinct because it measures the rate of aging rather than an age. A value near 1.0 means aging roughly one biological year per calendar year, and below 1.0 means slower. In the CALERIE randomized trial, sustained caloric restriction modestly slowed DunedinPACE, on the order of 2 to 3 percent (Waziry et al., Nature Aging, 2023), one of the few controlled human signals that a lifestyle change shifts a validated aging measure.

Functional predictors often out-perform any pill-based marker. Cardiorespiratory fitness (VO2max) showed a graded, no-upper-limit association with lower all-cause mortality in a cohort of over 120,000 patients (Mandsager et al., JAMA Network Open, 2018), where poor fitness carried risk comparable to established chronic disease. Grip strength independently predicted mortality in the international PURE study (Leong et al., Lancet, 2015). Both are commonly tracked alongside blood work.

For the blood markers listed above, the value is in reading the trend, not any single draw. In longevity practice ApoB is commonly tracked toward the low end of the reference range, hs-CRP toward under 1.0 mg/L as a low-inflammation signal, and homocysteine in the mid-single-digit micromoles-per-liter range. Individual targets and interpretation should be set with a licensed clinician.

What the human evidence actually shows

Honesty matters here because the marketing rarely supplies it. No completed human randomized trial has demonstrated extended lifespan from any supplement or peptide. The defensible claims are narrower.

NAD+ precursors reliably raise NAD+ levels and have acceptable short-term safety in trials. One 2021 Science trial (Yoshino et al.) reported improved skeletal-muscle insulin sensitivity in prediabetic women, but functional endpoints have generally been modest and long-term durability is unproven. Epithalon's human data comes largely from older, small, single-center studies with methodological limitations, so it is best described as promising and under-replicated rather than established. The strongest human longevity signals still come from caloric restriction (CALERIE) and fitness epidemiology, not compounds.

Timelines follow from this. Metabolic and inflammatory markers such as fasting insulin, hs-CRP, and ApoB can move meaningfully in 8 to 12 weeks. Epigenetic clocks drift slowly and carry real test-retest noise, so they need 6 months or more and repeat measurements to read as a trend. Individual lifespan is simply not a measurable personal endpoint, which is why trend-tracking a panel is the honest substitute.

Mistakes that quietly work against the goal

- Over-supplementing antioxidants around training. High-dose vitamin C (1000 mg) plus vitamin E (400 IU) blunted the insulin-sensitivity and mitochondrial-biogenesis gains from exercise in a controlled trial (Ristow et al., PNAS, 2009). Exercise benefit depends partly on the transient oxidative signal it produces, a hormetic effect that mega-dosing can erase. - Acting on epigenetic-clock noise. A single clock result can shift on retest, so a one-time number is a data point, not a verdict. - Neglecting the two strongest levers. VO2max and lean mass predict outcomes more powerfully than any supplement marker, yet they are the easiest to skip because they take effort rather than a purchase. - Over-applying mTOR-inhibition dogma. Under-eating protein and avoiding resistance training out of fear of "too much growth signaling" accelerates muscle loss. The nutrient-sensing balance cuts both ways, and preserving muscle after 50 is a longevity priority. Set individual targets and any pharmacologic decisions with a licensed clinician.

Peptides commonly used for longevity

Supplement stack pairing

Biomarkers to track for longevity

The protocol

1. 1
   Baseline comprehensive longevity panel: full lipids inc. ApoB + Lp(a), HbA1c, fasting insulin, hs-CRP, homocysteine, vitamin D, B12, albumin, ferritin.
2. 2
   Longevity Foundation supplement stack: NMN 500mg morning, resveratrol 500mg with fat, D3 5000 IU + K2 100mcg morning, fish oil 2g EPA+DHA with meals, magnesium glycinate 400mg bedtime, berberine 500mg 2x with meals (8 on / 4 off).
3. 3
   Epithalon 5–10mg daily SubQ for 10–20 days, twice yearly (the standard published protocol).
4. 4
   Resistance train 3–4x/week. Sarcopenia is the largest preventable longevity risk after age 50.
5. 5
   Sleep 7+ hours. The sleep-longevity correlation is one of the strongest in epidemiology.
6. 6
   Re-test the full panel quarterly. Trends over time matter more than any single value.

Common pitfalls

• ×Stacking 30 supplements without measuring anything. The "more is better" approach is how people end up with high homocysteine because they're pounding niacin without B12.
• ×Ignoring ApoB. The single best cardiovascular risk marker; standard lipid panels skip it.
• ×Skipping the boring stuff (sleep, training, stress) for the exotic stuff (peptides, NAD+ IVs). The boring stuff has the strongest data.
• ×Treating biological age tests as gospel. They're useful for trend-tracking, not as precise individual estimates.

Frequently Asked Questions

Other goals