Even though people ate more dairy, their body didn’t make more of the active form of vitamin D—so the hormone that might affect fat cells stayed the same.
Scientific Claim
In overweight and obese adults on a 12-week energy-restricted diet, serum 1,25-dihydroxyvitamin D levels do not significantly change with increased dairy intake, indicating that the active form of vitamin D is not elevated by dietary dairy under these conditions.
Original Statement
“No significant changes were observed in 1,25(OH)2D by treatment group; however, there was a trend (P = 0.06) toward a significant increase in the percent change of 1,25(OH)2D in the AD group at the end of the 12-week intervention; ~7.5% increase for the AD group compared to ~1% decline in the LD group.”
Evidence Quality Assessment
Claim Status
appropriately stated
Study Design Support
Design supports claim
Appropriate Language Strength
definitive
Can make definitive causal claims
Assessment Explanation
The study design supports causal inference, and the claim accurately reflects the absence of a significant effect, correctly noting the non-significant trend without overstating.
Evidence from Studies
Supporting (1)
The study gave some people more dairy while they were dieting and found that their active vitamin D levels didn’t go up — so dairy doesn’t boost this specific form of vitamin D during weight loss.