Common mistakes around Vitamin D Ernährung

Common mistakes around Vitamin D nutrition: Many assume that diet alone provides enough Vitamin D, but food sources (fatty fish, eggs) contain only small amounts. The primary source is sunlight. Another mistake is taking high-dose supplements without a prior blood test. Vitamin D is fat-soluble and can cause toxicity (hypercalcemia) if overdosed. People also overlook the synergy with magnesium and vitamin K2, which are essential for proper calcium metabolism. Genetic variants in VDR or GC genes can affect Vitamin D metabolism – DNA tests offer insights but are not diagnostic. Many supplement without adjusting for body weight, season, or baseline levels. The German DGE recommends 20 µg/day for adults, but individual needs vary. The safest approach: measure 25(OH)D levels, then supplement accordingly, ideally with co-factors. Avoid the misconception that 'more is better' – balance is key.