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4 peer-reviewed studies
What the evidence says
Most Green Coffee Bean studies are mechanism or observational rather than RCTs that measure a clinical effect — keep findings provisional.
Most evidence is from medium-quality meta-analyses and randomised trials published 2017–2024 with a typical study size of 71 participants.
Based on 4 studies · 2 meta-analyses · 1 RCT · 71 total participants
Confidence
HighBy outcome
3 studies in the last 5 years · Latest meta-analysis: 2024
A meta-analysis (3 RCTs, 103 people) found green coffee bean extract (chlorogenic acid 500mg/day) produced a small reduction in body weight.
Kanchanasurakit S et al. · Syst Rev (2023)
A meta-analysis found green coffee bean extract modestly reduced blood pressure.
Samavat S et al. · Diabetes Metab Syndr (2024)
A systematic review summarized chlorogenic acid's metabolic effects.
Tajik N et al. · Eur J Nutr (2017)
A manufacturer-funded randomized trial (n=71) reported significant weight and BMI reductions with green coffee bean extract.
Sudeep HV et al. · SAGE Open Med (2021)