Metformina
IMPORTANT: Metformin is not a peptide; it is a biguanide derived from the plant Galega officinalis. It has been the first-line medication for type 2 diabetes for decades, with billions of prescriptions. It gained enormous attention in the longevity field after studies suggested that diabetics taking metformin live longer than non-diabetics. The TAME study is testing whether it extends healthy human lifespan.
Last updated:: 07/04/2026
Research Status
ANVISA (Brazil)
Approved
FDA (USA)
Approved
EMA (Europe)
Approved
Mechanism of Action
Metformin activates AMPK (cellular energy sensor), inhibits hepatic gluconeogenesis, improves insulin sensitivity, and has direct effects on gut microbiota. Additional mechanisms include reducing systemic inflammation, modulating mTOR, and potential direct effects on aging pathways.
Study Protocols
Dosages and regimens used in published clinical studies. This does not constitute a medical prescription.
Longevidade / anti-aging (off-label)
OralTitulação para tolerância GI
Dose-alvo do estudo TAME
Diabéticos em metformina tiveram sobrevida 15% maior que controles não diabéticos. Estudo TAME (Targeting Aging with Metformin) em andamento.
Benefits
Type 2 diabetes
ProvenFirst-line treatment for decades. Reduces HbA1c by 1-2%, with an excellent safety profile and low cost.
Diabetes prevention
ProvenThe DPP study demonstrated a 31% reduction in diabetes incidence in pre-diabetic individuals treated with metformin.
View studyPossible anti-cancer effect
Under researchObservational studies suggest that diabetics on metformin have a lower incidence of various cancer types. Mechanism still under investigation.
Longevity
Under researchEpidemiological studies suggest that diabetics on metformin live longer than non-diabetics. The ongoing TAME study will test whether metformin delays aging in non-diabetic humans.
Risks and Side Effects
Gastrointestinal discomfort
Low(20-30%)Nausea, diarrhea, and abdominal discomfort are common, especially at the start. Generally decreases over time. The XR (extended-release) version is better tolerated.
Vitamin B12 deficiency
Moderate(Long-term use)Prolonged use may reduce vitamin B12 absorption. Periodic supplementation is recommended.
Lactic acidosis (rare)
High(Very rare)Rare but serious complication, especially in patients with renal insufficiency. Contraindicated in severe renal failure.
Internet vs. Science
What people say online compared to the actual scientific evidence.
Anti-aging pill for everyone
InconclusiveWhat they claim
Everyone over 40 should take metformin to age more slowly.
Actual evidence
Longevity evidence comes from observational studies in diabetics, not in healthy people. Studies in healthy athletes suggest metformin may actually reduce exercise benefits. The ongoing TAME study will answer this question.
Reduces exercise benefits
TrueWhat they claim
Metformin cancels strength gains and exercise adaptation.
Actual evidence
True in studies. In healthy non-diabetic adults, metformin attenuated strength and cardiorespiratory fitness gains induced by training. For athletes, it may be counterproductive.
| Claim | O que dizem | Evidência real | Verdict |
|---|---|---|---|
| Anti-aging pill for everyone | Everyone over 40 should take metformin to age more slowly. | Longevity evidence comes from observational studies in diabetics, not in healthy people. Studies in healthy athletes suggest metformin may actually reduce exercise benefits. The ongoing TAME study will answer this question. | Inconclusive |
| Reduces exercise benefits | Metformin cancels strength gains and exercise adaptation. | True in studies. In healthy non-diabetic adults, metformin attenuated strength and cardiorespiratory fitness gains induced by training. For athletes, it may be counterproductive. | True |
Studies and References (2)
Konopka AR, Laurin JL, Schoenberg HM, et al. — Aging Cell (2019) — n=53
Metformina atenuou adaptações mitocondriais e ganhos de aptidão cardiorrespiratória induzidos por exercício aeróbico em adultos mais velhos.
PubMedDiabetes Prevention Program Research Group — New England Journal of Medicine (2002) — n=3234
Metformina reduziu incidência de diabetes em 31% em pessoas com pré-diabetes ao longo de 2.8 anos.
PubMedFrequently Asked Questions
Can I take metformin even without being diabetic?
In Brazil, metformin requires a medical prescription. Off-label use for longevity or pre-diabetes is a decision between patient and physician. The ongoing TAME study will test whether metformin extends healthy lifespan in non-diabetics.
Important notice
This content is strictly informational and educational, based on published scientific research. It does not constitute medical advice, prescription, or encouragement to use any substance. Always consult a qualified physician before starting any treatment.
How to Obtain
This is an approved medication. A medical prescription is required for purchase.