Fasting for six days with no calories may lower certain chemicals in the blood linked to brain health — one drops because you're not eating, and the other suggests your body is producing fewer harmful substances.

46

Pro

0

Against

Evidence from Studies

Supporting (1)

46

Community contributions welcome

46

Exploring the effect of prolonged fasting on kynurenine pathway metabolites and stress markers in healthy male individuals

Randomized Controlled Trial

Human

2024 Aug

The study found that fasting for six days lowered levels of certain brain-related chemicals, including a harmful one, while increasing protective ones, which supports the idea that fasting shifts the body’s chemistry in a safer direction.

Contradicting (0)

0

Community contributions welcome

No contradicting evidence found

Gold Standard Evidence Needed

According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.

Source Study

Exploring the effect of prolonged fasting on kynurenine pathway metabolites and stress markers in healthy male individuals

Score: 46

DOI: 10.1038/s41430-024-01451-7

Similar Assertions

If healthy guys don't eat for six days, their bodies show higher levels of certain chemicals linked to how the body handles stress and metabolism, with the highest levels seen right at the end of the fast.

46

0

81%

After a 6-day water-only fast, a man’s metabolism resets certain chemicals in his body back to normal within a week of eating again—even if he hasn’t regained all his weight yet.

46

0

77%