The Claim

Oral hydroxycitrate supplementation at 500 mg following endurance exercise increases whole-body fat oxidation during recovery, as indicated by a lower respiratory quotient, without altering circulating free fatty acids or glycerol levels in healthy young men.

Source: Oral hydroxycitrate supplementation enhances glycogen synthesis in exercised human skeletal muscle

What the research says

Supports is higher

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

Supports
59score
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

Taking 500 mg of hydroxycitrate after endurance exercise increases the body's use of fat for energy during recovery, as shown by a lower respiratory quotient, while free fatty acids and glycerol in the blood remain unchanged in healthy young men.

See the scientific wording

Oral hydroxycitrate supplementation (500 mg) after endurance exercise increases whole-body fat oxidation during recovery, as indicated by a lower respiratory quotient, without altering circulating free fatty acids or glycerol levels in healthy young men.

Why this might work

After exercise, hydroxycitrate blocks a key step in sugar breakdown, forcing muscle cells to store more sugar as glycogen instead of burning it. This shortage of sugar fuel makes the muscle rely more on fat for energy. To get more fat inside the cells, the muscle increases the number of fat transporters on its surface, allowing more fat to enter and be burned for energy. Blood fat levels stay the same because the body is using its own stored fat, not pulling more from the bloodstream.

Verified mechanismbased on 1 study

What the research says

1 study

  1. Study: Oral hydroxycitrate supplementation enhances glycogen synthesis in exercised human skeletal muscle

    After a workout, taking hydroxycitrate helped the body burn more fat for energy during recovery, even though the amount of fat in the blood stayed the same — meaning the body was using its own stored fat better, not pulling more from the bloodstream.

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.