Skip to main content
SupplementScience

Types of Metformin (Longevity Context): Forms & Bioavailability

This content is for informational purposes only and does not constitute medical advice. Consult your healthcare provider before starting any supplement. Full disclaimer

Forms Comparison

FormBioavailabilityBest For
Metformin Extended-Release (ER)ModerateReduced GI side effects — slower release minimizes nausea and diarrhea that limit tolerance of immediate-release
Metformin Immediate-Release (IR)Moderate-HighStandard form — most studied version but higher rate of GI side effects

Metformin Extended-Release (ER)

Bioavailability: Moderate. Best for: Reduced GI side effects — slower release minimizes nausea and diarrhea that limit tolerance of immediate-release.

Metformin Immediate-Release (IR)

Bioavailability: Moderate-High. Best for: Standard form — most studied version but higher rate of GI side effects.

Full Metformin (Longevity Context) Guide

References

  1. (). Can people with type 2 diabetes live longer than those without? A comparison of mortality in people initiated with metformin or sulphonylurea monotherapy and matched, non-diabetic controls. Diabetes, Obesity and Metabolism. DOI
  2. (). Metformin and cancer risk and mortality: a systematic review and meta-analysis taking into account biases and confounders. Cancer Prevention Research. DOI
  3. (). Metformin inhibits mitochondrial adaptations to aerobic exercise training in older adults. Aging Cell. DOI