The Claim

In men with visceral obesity, a 1-year lifestyle intervention without vitamin D supplementation resulted in a 27% increase in plasma 25(OH) vitamin D concentrations, from 50 ± 18 to 60 ± 18 nmol/L.

Source: Relationships between circulating 25(OH) vitamin D, leptin levels and visceral adipose tissue volume: results from a 1-year lifestyle intervention program in men with visceral obesity

What the research says

Supports is higher

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

Supports
42score
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

Men who had excess belly fat saw their vitamin D levels go up by 27% after a year of eating better and moving more—even though they didn’t take any vitamin D pills or supplements.

See the scientific wording

In men with visceral obesity, plasma 25(OH) vitamin D concentrations increased by 27% (from 50 ± 18 to 60 ± 18 nmol/L) after a 1-year lifestyle intervention despite no vitamin D supplementation.

What the research says

1 study
  1. Study: Relationships between circulating 25(OH) vitamin D, leptin levels and visceral adipose tissue volume: results from a 1-year lifestyle intervention program in men with visceral obesity

    Men with belly fat followed a healthy diet and exercise plan for a year, and even though they didn’t take any vitamin D pills, their vitamin D levels went up by 27%. The study proves this can happen just by living healthier.

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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