Questions people ask about Vitamin D Frauen

Vitamin D is particularly important for women, playing a key role in bone health, immune function, and pregnancy. The standard test measures 25-hydroxyvitamin D in blood, with widely accepted but not universally standardized cutoffs: deficiency <20 ng/mL, insufficiency 20–30 ng/mL. The available studies (all cross-sectional or retrospective, 2025–2026) provide prevalence data but no interventional evidence. Genetic tests for vitamin D status, such as variants in VDR or GC genes, have limited predictive power and are not recommended in clinical practice. For women, especially during menopause or when planning pregnancy, optimizing vitamin D levels may be beneficial, but supplementation should be individualized and ideally guided by blood testing. The evidence is moderate: cutoffs are based on observational data, not randomized controlled trials. Therefore, results should be seen as guidance, not definitive medical advice. A home test can give an initial indication but does not replace professional consultation.