Can Vitamin D Test help with Haut?

A vitamin D test (blood test for 25-hydroxyvitamin D) can indicate deficiency, which has been linked to skin conditions like psoriasis, eczema, and acne. However, the evidence is mixed: severe deficiency clearly impairs skin health, but supplementation in non-deficient individuals shows only modest benefits in randomized trials. A DNA test for vitamin D-related genes (e.g., VDR, GC) does not measure current vitamin D levels or directly predict skin health – a blood test is required. MyBody-X may offer both, but interpretation should be personalized, considering sun exposure, diet, and lifestyle. Marketing often overstates the connection. Conclusion: A vitamin D blood test can be useful if deficiency is suspected, but it is not a universal skin solution. The DNA component adds little practical value for skin concerns.