Can Vitamin D 25-OH help with Abnehmen?

Whether vitamin D (25-OH) aids weight loss is not scientifically clear. Observational studies link low vitamin D levels with obesity, but this does not prove causality. Randomized controlled trials (RCTs) show mixed results: some suggest a modest reduction in fat mass, others find no significant effect. Vitamin D is crucial for bone health, immune function, and possibly metabolism, but evidence for a direct role in weight loss is weak. High doses can be toxic (hypercalcemia). MyBody-X offers vitamin D testing to assess status, but interpretation should be done by a physician. For weight loss, calorie deficit, exercise, and balanced nutrition remain the primary drivers. The evidence for vitamin D as a weight-loss aid is best described as 'human-moderate' to 'mixed'.