The Claim

Twelve weeks of daily supplementation with 12 mg of purified cafestol reduces visceral fat volume by approximately 400 mL and body weight by 0.88 kg in healthy adults with increased waist circumference, without altering insulin sensitivity or glucose tolerance.

Source: Effects of 12-Week Supplementation with Coffee Diterpene Cafestol in Healthy Subjects with Increased Waist Circumference: A Randomized, Placebo-Controlled Trial

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
73score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Cause and effect
1 study reviewed
In plain English

Daily intake of 12 mg of purified cafestol for 12 weeks reduces visceral fat by about 400 mL and body weight by 0.88 kg in healthy adults with increased waist circumference, without changing insulin sensitivity or glucose tolerance.

See the scientific wording

Twelve weeks of daily supplementation with 12 mg of purified cafestol reduces visceral fat volume by approximately 400 mL and body weight by 0.88 kg in healthy adults with increased waist circumference, without altering insulin sensitivity or glucose tolerance, suggesting cafestol may influence fat distribution independently of glucose metabolism.

Why this might work

Cafestol enters the bloodstream after being absorbed in the gut, travels to fat tissue around the organs, and turns down genes that make fat cells store more fat. This causes the fat cells to hold less fat, shrinking the belly fat layer and lowering overall body weight without changing how the body processes sugar.

Supported mechanismbased on 1 study

What the research says

1 study
  1. Study: Effects of 12-Week Supplementation with Coffee Diterpene Cafestol in Healthy Subjects with Increased Waist Circumference: A Randomized, Placebo-Controlled Trial

    Taking 12 mg of cafestol daily for 12 weeks helped people lose some belly fat and a little weight without changing how their body handles sugar — just like the claim says.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.