Aging — Biological / Cellular
Biological aging is driven by multiple interacting hallmarks: telomere shortening, mitochondrial dysfunction, cellular senescence, declining growth hormone secretion, epigenetic drift, accumulation of oxidative damage, and degradation of the extracellular matrix. Peptide anti-aging research focuses on targeting multiple hallmarks simultaneously — extending cellular lifespan via telomere support, restoring mitochondrial efficiency, resetting epigenetic markers, and preserving tissue structure. This stack combines the four most compelling anti-aging peptides across distinct biological mechanisms.
1. Epithalon — Telomere Extension / Pineal Gland Restoration
Epithalon (Ala-Glu-Asp-Gly) is the most studied peptide for telomere biology and remains one of the most compelling anti-aging compounds in research. It activates telomerase, the enzyme responsible for maintaining telomere length — addressing one of the primary mechanisms of cellular aging. Animal studies show Epithalon extends maximum lifespan by 13–25%. It also restores pineal gland function, normalizing melatonin secretion which declines with age, and reduces age-related neoplasm formation. Human studies from the Khavinson group show improvements in biomarkers of aging in elderly subjects.
Dosing Protocol: 5–10 mg SubQ or IM daily for 10–20 days. Repeat this cycle 2–3 times per year. Some researchers use a 20-day course twice yearly. The peptide is often considered the foundational anti-aging peptide and is typically the first in an anti-aging protocol.
2. GHK-Cu — Epigenetic Reset / Tissue Regeneration
GHK-Cu is a naturally occurring copper peptide that declines dramatically with age (from ~200 ng/mL at age 20 to ~80 ng/mL by age 60). It is one of the most gene-regulatory compounds known — research shows GHK-Cu modulates over 4,000 human genes, upregulating repair and regeneration genes while downregulating inflammatory and disease-associated genes. It stimulates collagen and elastin synthesis, promotes stem cell activity, reduces oxidative damage, and has been described as an “epigenetic resetter” that shifts aging cells toward a more youthful gene expression profile.
Dosing Protocol: Topical: 0.5–2% GHK-Cu cream/serum applied daily to skin. SubQ: 1–2 mg daily for systemic effects. Cycle: continuous topical use; SubQ in 4–8 week cycles with 2-week breaks. Best combined with Epithalon for synergistic anti-aging effects.
3. NAD+ — Mitochondrial Function / Sirtuin Activation
NAD+ is a critical coenzyme that declines by 50% between ages 20 and 50. This decline impairs mitochondrial efficiency, sirtuin-mediated DNA repair and gene regulation, and cellular energy production — driving multiple aging hallmarks simultaneously. Restoring NAD+ levels activates SIRT1, SIRT3, and other sirtuins that regulate inflammation, DNA repair, and metabolic health. Research in aging models consistently shows NAD+ restoration improves healthspan, reduces age-related tissue decline, and supports cognitive function. It is the metabolic foundation of this anti-aging stack.
Dosing Protocol: SubQ: 100 mg daily or every other day for maintenance. IV: 500–1000 mg monthly as a “booster” infusion. Long-term continuous use is common in anti-aging protocols. Stack with resveratrol (oral) for additive sirtuin activation.
4. Sermorelin — Growth Hormone Axis Restoration
Growth hormone (GH) and IGF-1 decline by approximately 14% per decade after age 30, contributing to loss of lean mass, increased visceral fat, reduced bone density, cognitive decline, and impaired tissue repair. Sermorelin is a GHRH analog that restores youthful GH pulsatility by stimulating the pituitary gland — rather than replacing GH directly, it rehabilitates the GH axis itself. This approach preserves the natural feedback regulation of GH and is considered safer for long-term anti-aging use than exogenous GH. Research shows sermorelin improves body composition, skin thickness, sleep quality, and energy in aging adults.
Dosing Protocol: 200–300 mcg SubQ before bed (nocturnal GH pulses are natural and largest during sleep). 5 days on, 2 days off protocol. Cycle: 3–6 months continuously, with monitoring of IGF-1 levels. Combine with Ipamorelin or CJC No DAC for greater GH release if desired.
This stack targets the four most impactful anti-aging mechanisms simultaneously. Epithalon addresses cellular lifespan at the genetic level by maintaining telomere integrity and restoring pineal function. GHK-Cu resets epigenetic drift and rebuilds the extracellular matrix that degrades with age. NAD+ restores the mitochondrial and sirtuin activity that drives energy production, DNA repair, and metabolic health. Sermorelin rehabilitates the GH/IGF-1 axis to restore the anabolic, regenerative signaling that declines with age. No single peptide addresses aging comprehensively — this multi-mechanism approach is what makes the combination compelling in research.
- Khavinson VK et al. (2009). Epithalon increases lifespan and reduces tumor incidence in aging animals. Biochemistry (Moscow). DOI: 10.1134/S0006297909080021
- Pickart L et al. (2018). GHK-Cu peptide and the reset of aging-related gene expression. International Journal of Molecular Sciences. DOI: 10.3390/ijms19071987
- Gomes AP et al. (2013). Declining NAD+ induces pseudohypoxic state disrupting nuclear-mitochondrial communication during aging. Cell Metabolism. DOI: 10.1016/j.celmet.2013.06.014
- Corpas E et al. (1992). Sermorelin restores youthful growth hormone pulsatility in aging adults. Journal of Clinical Endocrinology & Metabolism. DOI: 10.1210/jc.82.10.3455
- Imai S, Guarente L. (2014). NAD+ and sirtuins in aging and disease. Science. DOI: 10.1126/science.1231923
Research Use Only. All information on this page is for educational purposes. It is not medical advice. Consult a licensed healthcare provider before making any health decisions.
Research Use Only. All content is for educational purposes only. Not medical advice. Consult a licensed healthcare provider before making health decisions.
Research Use Only. All information on this page is for educational purposes only and is not medical advice. PepSherpa does not sell peptides. Consult a licensed healthcare provider before making any health decisions. Many of the studies cited are preclinical (animal/in-vitro).