Best for Longevity and healthy-aging research

Best Compounds for Longevity Research

Longevity discussions often place approved drugs, dietary compounds, and experimental peptides into one undifferentiated category. This review ranks the public source record by evidence depth: approved drugs with human data first, then compounds with controlled human studies, followed by preclinical-only peptide candidates. It is an evidence map, not a recommendation or treatment guide.

Last reviewed 2026-07-10 Next review 2026-08-10 16 sources
# Compound Evidence level Why it's listed
1 Rapamycin (Sirolimus)
Evidence review
Approved drug for other indications; peer-reviewed animal lifespan evidence and limited human aging-related trials The strongest mammalian lifespan evidence in the group, plus an FDA-approved drug record for unrelated indications and limited controlled human immune-aging research.
2 Metformin
Evidence review
Approved drug with extensive human data; longevity hypothesis remains under study Extensive human safety and diabetes data with observational longevity signals, while the TAME program tests whether those signals translate beyond diabetes care.
3 Spermidine
Evidence review
Human trials for selected outcomes plus preclinical longevity mechanisms Human cognition studies and a defined dietary exposure record place it above preclinical-only peptide candidates, though lifespan claims remain unsettled.
4 Epitalon
Regulatory watch
Peer-reviewed cellular and preclinical evidence; limited human evidence A prominent longevity peptide with published cellular findings but a narrow research base and no large, independently replicated human outcome trials.
5 MOTS-c
Regulatory watch
Preclinical and observational human research; no established therapeutic trials A biologically interesting mitochondria-derived peptide with strong mechanistic attention but no confirmed therapeutic benefit from human interventional trials.

Rapamycin (Sirolimus)

Rapamycin (Sirolimus)

The strongest mammalian lifespan evidence in the group, plus an FDA-approved drug record for unrelated indications and limited controlled human immune-aging research.

Evidence level: Approved drug for other indications; peer-reviewed animal lifespan evidence and limited human aging-related trials

Regulatory status: FDA-approved for specific medical indications; not approved for longevity or anti-aging

Rapamycin extends lifespan in multiple mouse studies, including late-life intervention experiments. A controlled trial of the related mTOR inhibitor everolimus reported improved vaccine response in older adults. Rapamycin is FDA-approved for transplant rejection prophylaxis and lymphangioleiomyomatosis, not aging, and human longevity outcomes remain unproven.

Metformin

Metformin

Extensive human safety and diabetes data with observational longevity signals, while the TAME program tests whether those signals translate beyond diabetes care.

Evidence level: Approved drug with extensive human data; longevity hypothesis remains under study

Regulatory status: FDA-approved for Type 2 diabetes; not approved for aging

Metformin is an established FDA-approved treatment for Type 2 diabetes. Observational studies have reported mortality patterns that motivated geroscience interest, but observational data cannot prove an anti-aging effect. The TAME concept is designed to test whether metformin can delay multiple age-related diseases in non-diabetic adults.

Spermidine

Spermidine

Human cognition studies and a defined dietary exposure record place it above preclinical-only peptide candidates, though lifespan claims remain unsettled.

Evidence level: Human trials for selected outcomes plus preclinical longevity mechanisms

Regulatory status: Dietary compound; not FDA-approved as a longevity treatment

Spermidine is a naturally occurring polyamine studied for autophagy, cognition, and healthy aging. Human trials have examined cognitive outcomes, while much of the longevity rationale comes from mechanistic and preclinical work. Supplement findings should not be conflated with proven lifespan extension.

Epitalon

Epitalon

A prominent longevity peptide with published cellular findings but a narrow research base and no large, independently replicated human outcome trials.

Evidence level: Peer-reviewed cellular and preclinical evidence; limited human evidence

Regulatory status: Not FDA-approved; regulatory watch

Publications from the Khavinson research group report telomerase-related cellular effects and longevity-oriented findings. The evidence base is concentrated within a limited research network, lacks large modern human trials, and does not establish clinical anti-aging efficacy.

MOTS-c

MOTS-c

A biologically interesting mitochondria-derived peptide with strong mechanistic attention but no confirmed therapeutic benefit from human interventional trials.

Evidence level: Preclinical and observational human research; no established therapeutic trials

Regulatory status: Not FDA-approved; regulatory watch

MOTS-c was identified as a mitochondrial-derived peptide involved in metabolic signaling. Mouse studies reported effects on insulin sensitivity and obesity-related endpoints, while observational human work has examined changes associated with exercise and aging. Human treatment efficacy has not been established.

Editorial note

Aging is not an FDA-approved indication for any item on this page. Approval for another disease does not establish a longevity benefit, and animal lifespan findings should not be presented as human outcomes.

Sources on this page

Source records are stored in the repo and linked from this page.

Rapamune (sirolimus) Label Information

U.S. Food and Drug Administration · Primary regulatory · 2023-09-01 · accessed 2026-07-01

FDA-approved prescribing label for Rapamune (sirolimus), indicated for prophylaxis of organ rejection in kidney transplant patients and for the treatment of lymphangioleiomyomatosis (LAM).

mTOR inhibition improves immune function in the elderly

Science Translational Medicine · Peer reviewed · 2014-12-24 · accessed 2026-07-01

Double-blind, placebo-controlled trial (Mannick et al.) showing that low-dose rapamycin analog (everolimus) improved immune response to influenza vaccine in older adults, providing early human translational evidence.

GLUCOPHAGE (metformin hydrochloride) Label Information

U.S. Food and Drug Administration · Primary regulatory · 2017-01-01 · accessed 2026-07-01

FDA-approved prescribing label for Glucophage (metformin hydrochloride), indicated as an adjunct to diet and exercise to improve glycemic control in adults and children with type 2 diabetes mellitus.

Targeting Aging with Metformin (TAME) — ClinicalTrials.gov

ClinicalTrials.gov / U.S. National Library of Medicine · Primary regulatory · 2015-05-04 · accessed 2026-07-01

ClinicalTrials.gov registry entry for the TAME (Targeting Aging with Metformin) trial, a multi-center study investigating whether metformin can delay the onset of age-related diseases in non-diabetic adults.

Metformin as a Tool to Target Aging (TAME concept article)

Cell Metabolism / Elsevier · Peer reviewed · 2016-09-13 · accessed 2026-07-01

Nir Barzilai and colleagues outline the scientific rationale and design of the TAME trial, arguing that metformin's AMPK-activating, insulin-sensitizing effects make it a candidate to target aging biology.

Epitalon and geroprotective peptides — review of anti-aging claims

PubMed / NCBI · Peer reviewed · 2020-01-01 · accessed 2026-07-03

Reviews of Epitalon and related peptides in the context of aging biology, noting that telomerase and longevity claims rest on preclinical data from limited research groups without large-scale human clinical trials.