The Claim

Soy isoflavone supplements reduce the severity of menopausal hot flashes by 26.2% compared to placebo, with a 95% confidence interval of -42.23% to -10.15%, in perimenopausal and postmenopausal women.

Source: Extracted or synthesized soybean isoflavones reduce menopausal hot flash frequency and severity: systematic review and meta-analysis of randomized controlled trials

What the research says

Supports is higher

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

Supports
39score
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.

Quantitative
1 study reviewed
In plain English

Soy isoflavone supplements reduce the severity of menopausal hot flashes by 26.2% compared to a placebo in perimenopausal and postmenopausal women.

See the scientific wording

Soy isoflavone supplements reduce the severity of menopausal hot flashes by 26.2% compared to placebo, with a 95% confidence interval of -42.23% to -10.15%, demonstrating a statistically significant effect in perimenopausal and postmenopausal women across 9 randomized controlled trials.

Why this might work

Soy isoflavones bind to estrogen receptors in the brain's temperature control center, which reduces false signals that the body is overheating, leading to fewer and less intense hot flashes.

Suggested mechanismbased on 1 study

What the research says

1 study
  1. Study: Extracted or synthesized soybean isoflavones reduce menopausal hot flash frequency and severity: systematic review and meta-analysis of randomized controlled trials

    This study found that women who took soy supplements had hot flashes that were about 26% less severe than those who took dummy pills, which matches exactly what 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.