Peptide tier list for anti-aging and longevity
Ranked by what's producing the best results for aging, skin, cellular health, and long term wellness
The order within each tier is not a ranking. They're just grouped by tier not listed best to worst
S TIER
HGH - sleep, skin, recovery, body comp, energy. The most established compound on this list with decades of clinical use. Everything about aging improves when GH levels are optimized
GHK-Cu - the most researched anti-aging peptide available. Naturally occurs in the body and declines sharply with age. Modulates over 4000 genes involved in tissue remodeling, collagen synthesis, and inflammation. Human studies show improvements in skin thickness, elasticity, and wrinkle depth. Works injectable and topical
Thymosin Alpha-1 - your immune system ages just like everything else. Most legitimate immune peptide with clinical use in 30+ countries. Immune modulation and inflammation control are foundational to aging well
A TIER
NAD+ precursors (NMN / NR) - NAD+ levels drop by as much as 50% between young adulthood and later decades. Preclinical data shows restoring levels can improve mitochondrial function, cognitive performance, and multiple aging markers. Multiple delivery routes available
Epithalon - studied for telomerase activation and telomere length. Telomere shortening is one of the hallmarks of aging. Sleep and circadian rhythm support are the more immediately noticeable benefits. Human data is limited but the mechanism is directly relevant
BPC-157 - tissue repair, gut health, and reducing systemic inflammation all contribute to aging better. Pro-angiogenic effects support blood vessel health which declines with age
TB-500 - tissue remodeling and repair. Supports the body's ability to recover and rebuild which naturally slows down over time. Often paired with BPC-157
B TIER
CJC-1295 + Ipamorelin - GH support without injecting exogenous HGH. Sleep, recovery, and body comp improvements all feed into the anti-aging picture. More affordable than HGH
Sermorelin - same category as CJC/Ipa. GH support for sleep and recovery. Clinical history in wellness settings
MOTS-c - mitochondrial derived peptide. Mitochondrial decay is a major driver of aging. Studied for insulin sensitivity and metabolic regulation. Human data is limited but the mechanism is directly tied to cellular aging
SS-31 / Elamipretide - targets the mitochondrial inner membrane directly. Studied for mitochondrial protection and cellular energy. Highly regarded in longevity circles
Semax - neuroprotection and BDNF upregulation. Cognitive decline is one of the most impactful age related changes. Protects dopaminergic neurons and reduces neuroinflammation in preclinical models
Selank - cognitive preservation and neuroinflammation reduction. Neuroinflammation is increasingly recognized as a driver of systemic aging
C TIER
Glutathione - master antioxidant. Detoxification and immune support. Levels decline with age
Collagen peptides (oral) - most accessible anti-aging option. Some clinical evidence for skin elasticity and hydration
KPV - anti-inflammatory without immunosuppression. Chronic inflammation accelerates aging. KPV addresses that through NF-kB inhibition
DSIP - deep restorative sleep is where repair happens. DSIP may support sleep architecture but human data is mixed
Thymalin - immune and longevity peptide. Limited published evidence but immune restoration is relevant to aging
D TIER
Melanotan II - cosmetic tanning compound. Not an anti-aging peptide. Side effect profile makes it hard to justify here
Dihexa - cognitive peptide with theoretical relevance but very limited data and safety concerns around its mechanism
The compounds in S and A tier are there because they address the root drivers of aging. GH decline, immune dysfunction, mitochondrial decay, tissue breakdown, and chronic inflammation. Everything below supports those areas or targets something more specific
This is educational and research discussion only. Not medical advice
What would you move? Drop your rankings below