Closing
Does metformin improve inflammation & biomarkers versus placebo?
Mostly studied in type 2 & unspecified diabetes. Also asked against other treatments.
Not modeled yetTrial evidence exists, but no mechanistic model yetWithout a model there is no decisive experiment to propose. Help build it. →
Where the evidence stands
A coin flip. So far, one result, not yet repeated.
NoUnsureYes
- Belief
- 0.50 (range 0.25–0.70)
- Trials for
- 1
- Trials against
- 0
- Inconclusive
- 3
Already under way
- Focusing on the Menopausal Transition to Improve Mid-Life Women's HealthNCT06975111 · recruiting · started 2026
- Therapeutic Synergy of Probiotic Augmented Conventional Antidiabetic Pharmacotherapy in Gestational Diabetes MellitusNCT07645001 · recruiting · started 2026
- Study on the Effect of Metformin in Improving Cardiac Function After Implantation of Left Ventricular Assist DevicesNCT07666698 · not yet recruiting · started 2026
- Evaluation of the Efficacy and Safety of Hebenrun in Patients With Type 2 Diabetes Mellitus: A Randomized Controlled TrialNCT07768280 · not yet recruiting · started 2026
- The Effect of Empagliflozin and Metformin on Oxidative Capacity and Microvascular Reactivity of Skeletal Muscle in Patients With Type 2 Diabetes MellitusNCT07771010 · recruiting · started 2026
The evidence so far
- Registered trials
- 190
- With posted results
- 37
- Published papers
- 14
Of 21 decided analyses: 1 favor metformin, 18 find no difference, 2 favor the comparator.
Papers
- Effects of a combination of rhGH and metformin on adiponectin levels in patients with metabolic syndrome.Trial report · 2005
- The effects of metformin on endogenous androgens and SHBG in women: a systematic review and meta-analysis.Meta-analysis / systematic review · 2009
- Effects of metformin treatment on blood leptin and ghrelin levels in patients with type 2 diabetes mellitus.Meta-analysis / systematic review · 2017
- Impact of metformin on C-reactive protein levels in women with polycystic ovary syndrome: a meta-analysis.Meta-analysis / systematic review · 2017
- The effect of metformin on biomarkers associated with breast cancer outcomes: a systematic review, meta-analysis, and dose-response of randomized clinical trials.Meta-analysis / systematic review · 2020
- Meta-Analysis of Randomized Controlled Trials of Pharmacologic Agents in Non-alcoholic Steatohepatitis.Meta-analysis / systematic review
Trials
- A Randomized, Parallel Group, Double-blind, Multi-center Study Comparing the Efficacy and Safety of AVANDAMET and Metformin After 80 Weeks of Treatment.NCT00386100 · 15 posted results
- A Phase 3b, Double-Blind, Randomized Study to Determine the Efficacy and Safety of Pioglitazone HCl and Metformin HCl Fixed-Dose Combination Therapy Compared to Pioglitazone HCl Monotherapy and to Metformin HCl Monotherapy in the Treatment of Subjects With Type 2 DiabetesNCT00727857 · 6 posted results
- Glycemic Control in Children and Adolescents With Double Diabetes: Trial of Optimized Insulin-Metformin RegimenNCT01334125 · 1 posted result
- Effectiveness of the Treatment With Dapagliflozin and Metformin Compared to Metformin Monotherapy for Weight Loss on Diabetic and Prediabetic Patients With Obesity Class IIINCT03968224 · 2 posted results
- A Randomized Phase 3 Trial of Metformin in Patients Initiating Androgen Deprivation Therapy as Prevention and Intervention of Metabolic Syndrome: The Prime StudyNCT03031821
- Effect of Metformin on Healthy Live Birth After In-vitro Fertilization in Women With Prediabetes Mellitus: a Multicenter Double-blind Placebo Controlled Randomized TrialNCT06064669
- Gut-Brain-axis: Targets for Improvement of Cognition in the ElderlyNCT04841668
- A Randomized Trial of Metformin as Adjunct Therapy for Overweight Adolescents With Type 1 DiabetesNCT01881828