‘Big’ people must exercise through the winter
Sat 12:08 pm +00:00, 11 Oct 2025 1During winter in northern climates, sunlight is too weak to trigger vitamin D production, leaving many people — especially those with excess body fat — at risk for deficiency A 10-week study found that exercise alone, without supplements or weight loss, helped maintain levels of active vitamin D in overweight or obese adults …













