What is the best anti-aging peptide?

Epithalon ranks #1 for direct anti-aging evidence — it's the only compound with human clinical trial data demonstrating telomere lengthening and telomerase activation. NAD+ is a close second for its fundamental role in mitochondrial function and DNA repair, which decline significantly with age.

Can peptides reverse aging?

No compound reverses aging completely. However, peptides like Epithalon have demonstrated measurable improvements in aging biomarkers — specifically telomere length and telomerase activity — in peer-reviewed human studies. NAD+ restores cellular energy metabolism and DNA repair capacity that decline with age.

How is Epithalon different from other longevity compounds?

Epithalon's key distinction is its mechanism and the quality of evidence behind it. It directly activates telomerase — the enzyme that rebuilds telomeres. In human studies with elderly subjects, Epithalon was shown to produce measurable telomere lengthening. No other supplement or peptide has this same combination of direct telomerase activation and peer-reviewed human clinical evidence.

How do you take Epithalon?

The most studied Epithalon protocol involves reconstituting the lyophilized peptide with bacteriostatic water and injecting subcutaneously once or twice daily for 10–20 consecutive days. Typical doses are 5–10mg per day. This cycle is typically run once or twice per year.

Is NAD+ better taken as a supplement or injection?

Subcutaneous injection and IV NAD+ achieve higher blood levels than oral precursors (NMN, NR, niacin). Oral precursors require conversion to NAD+ in the body and have lower bioavailability. Injectable or IV NAD+ bypasses this conversion step. For general maintenance, oral NMN/NR is fine. For therapeutic purposes, injectable is preferred.

Best Anti-Aging Peptides of 2026: Epithalon, NAD+, GHK-Cu Compared

Detailed Rankings

Best Anti-Aging Peptides, Compared

Ranked by research quality, mechanism specificity, and real-world evidence. All scores based on published human trials, animal studies, and clinical experience.

🏆 Top Pick Human clinical trials

Epithalon

Telomerase activator

9.2

Score

The most researched longevity peptide. Activates telomerase enzyme to preserve telomere length and extend cellular lifespan. Human clinical trials show measurable telomere lengthening.

Telomere lengtheningCellular longevitySleep improvementHormone regulation

Dosing

5–10mg/day for 10–20 days

Cycle

1–2x per year

Evidence

Human clinical trials

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Human clinical trials

NAD+

Nicotinamide adenine dinucleotide

8.8

Score

Critical coenzyme for mitochondrial function and cellular energy. Injectable NAD+ bypasses oral bioavailability issues for direct cellular benefits.

Mitochondrial functionEnergy metabolismDNA repairSirtuin activation

Dosing

50–100mg SQ or 250–500mg IV

Cycle

Ongoing maintenance

Evidence

Human clinical trials

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In vitro + animal studies

GHK-Cu

Copper peptide

8.1

Score

Copper-binding peptide that promotes collagen synthesis, skin regeneration, and wound healing. Popular for anti-aging skin protocols.

Skin regenerationCollagen synthesisWound healingHair growth

Dosing

1–3mg/day SQ or topical

Cycle

Ongoing

Evidence

In vitro + animal studies

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Animal + human studies

Thymulin

Thymus peptide

7.4

Score

Immune restoration peptide that supports thymus function. The thymus shrinks with age, leading to immune decline. Thymulin may help restore immune function.

Immune restorationThymus supportT-cell functionAging immunity

Dosing

1–2mg/week

Cycle

Short cycles (4–8 weeks)

Evidence

Animal + human studies

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Head-to-Head

Anti-Aging Peptide Comparison Table

Peptide	Primary Mechanism	Evidence Type	Route	Cycle	Best For
Epithalon ⭐ Top Pick	Telomerase activation, telomere lengthening	Human clinical trials	Subcutaneous	10–20 days, 1–2x/year	Cellular longevity, telomeres
NAD+	Mitochondrial function, DNA repair, sirtuins	Human clinical trials	SQ or IV	Ongoing maintenance	Energy, mitochondria
GHK-Cu	Collagen synthesis, gene reprogramming	In vitro + animal	Topical or SQ	Ongoing	Skin, wound healing
Thymulin	Immune restoration, thymus support	Animal + human	Subcutaneous	Short cycle	Immune aging

⭐ Editor's Choice

BioLongevity Labs

✓ Third-party COA verified

✓ Lyophilized for stability

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Best Peptides for Anti-Aging & Longevity

Best Anti-Aging Peptides, Compared

Anti-Aging Peptide Comparison Table