Nutritionwell supported · human data
Calcium will not make you leaner, whether it comes from pills or dairy
Across 41 pooled trials, neither calcium supplements nor around 3 daily dairy servings shifted body weight or body fat. The only hint of benefit appeared when dairy was added to a calorie-restricted diet, where it was tied to modestly greater fat loss in the short term.
For you: No reason to buy calcium for fat loss. If you are dieting anyway, keeping dairy in the plan may help a little, but the deficit is doing the heavy lifting.
What it shows: A convincing null: results pooled from 41 trials in several thousand adults found extra calcium made no meaningful dent in weight or fat. The dairy-while-dieting fat loss signal came from a smaller set of 13 short trials, so treat it as a lead rather than a promise.Meta-analysis · Br J Nutr