What should I know about vitamin d mangel hautprobleme?

Vitamin D deficiency can contribute to skin issues such as dryness, itching, eczema, and impaired wound healing. Research indicates that vitamin D supports the skin barrier and has anti-inflammatory properties. Deficiency has been linked to psoriasis and acne, though the evidence is not always causal. The most reliable way to assess vitamin D status is through a blood test measuring 25-hydroxyvitamin D. Genetic tests for vitamin D-related SNPs (e.g., in the VDR gene) can indicate predisposition but do not reflect actual levels. MyBody-X tests are for adults and are not substitutes for medical diagnosis. If you have skin problems, consult a doctor before taking supplements, as vitamin D overdose can be toxic. The evidence for the vitamin D–skin connection is human-strong, based on numerous observational and interventional studies. However, this answer is not derived from the provided context but from general medical knowledge.