The Claim

Cafestol supplementation at 12 mg daily for 12 weeks has no effect on fasting HbA1c, mean glucose, or glucose variability in healthy adults with increased waist circumference.

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.

Description
1 study reviewed
In plain English

Taking 12 mg of cafestol daily for 12 weeks does not change fasting HbA1c, average blood glucose, or blood glucose fluctuations in healthy adults with higher waist circumference.

See the scientific wording

Cafestol supplementation at 12 mg daily for 12 weeks does not alter fasting HbA1c, mean glucose, or glucose variability in healthy adults with increased waist circumference, indicating no short-term impact on glycemic control despite reductions in visceral fat and GGT.

Why this might work

Cafestol enters the body, reduces fat stored around internal organs, and lowers a liver enzyme linked to stress, but it does not change how the body manages blood sugar levels.

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

    This study gave people 12 mg of cafestol daily for 12 weeks and found it didn’t improve their blood sugar control, even though it helped reduce belly fat. So, taking cafestol doesn’t seem to help lower blood sugar or prevent spikes in people with extra belly fat.

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.