The Claim

The addition of 48–54 mg/day of kahweol to 60 mg/day of cafestol increases alanine aminotransferase by 35 U/L (P=0.004) and does not significantly alter serum lipid levels, indicating that kahweol enhances cafestol’s effect on liver enzymes without increasing its effect on serum lipids.

Source: Separate effects of the coffee diterpenes cafestol and kahweol on serum lipids and liver aminotransferases.

What the research says

Supports is higher

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

Supports
66score
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.

How it works
1 study reviewed
In plain English

Adding kahweol to cafestol raises a liver enzyme called alanine aminotransferase by 35 U/L without changing serum lipid levels.

See the scientific wording

The addition of 48–54 mg/day of kahweol to 60 mg/day of cafestol further increases alanine aminotransferase by 35 U/L (P=0.004) but has no statistically significant additional effect on serum lipids, indicating that kahweol potentiates cafestol’s effect on liver enzymes without amplifying its hyperlipidemic activity.

Why this might work

Cafestol triggers liver cells to activate stress pathways that increase enzyme release into the blood. Kahweol strengthens this same stress response in liver cells, causing more enzyme to leak out, but does not change how the liver handles fats.

Supported mechanismbased on 1 study

What the research says

1 study
  1. Study: Separate effects of the coffee diterpenes cafestol and kahweol on serum lipids and liver aminotransferases.

    When kahweol is added to cafestol, it makes a liver enzyme go up a lot, but doesn’t make cholesterol or triglycerides go up any more than cafestol alone. So kahweol affects the liver differently than it affects fats in the blood.

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.

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