{"count":1,"index":{"built_at":"2026-07-27T05:41:43.946746+00:00","public_records":55311,"revision":"123b4b95b44920a5f0f9700f"},"query":{"area":null,"kind":null,"lang":null,"limit":10,"match_mode":"all_terms","q":"Evidence check: Vitamin D 25-OH in the context of Fruchtbarkeit"},"results":[{"answer":"The role of vitamin D (25-OH) in fertility is increasingly discussed, but the evidence is mostly moderate. Observational studies link low vitamin D levels to reduced fertility in women (e.g., longer cycle length, lower oocyte quality) and men (lower sperm quality). Randomized controlled trials (RCTs) are fewer and show mixed results: some report improved live birth rates after supplementation, others no significant effect. The German Nutrition Society (DGE) recommends a 25-OH-D level of at least 50 nmol/l, but no specific fertility guidelines exist. Important: deficiency should be confirmed by blood test before supplementing, as long-term high doses (e.g., >100 µg/day) can be toxic. Individual genetics (e.g., VDR variants) may influence vitamin D metabolism, but the effect is small. Overall, maintaining adequate vitamin D is sensible but not a magic bullet. Evidence is based on human studies of moderate quality, not strong RCTs.","area":"gesundheit","canonical_id":"gesundheit:canonical-3474f7a600465f532b323f64","id":"public-d97cbf5d96ba4f13b2f32eb5","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: Vitamin D 25-OH in the context of Fruchtbarkeit","score":26.71194244,"snippet":"The role of vitamin D (25-OH) in fertility is increasingly discussed, but the evidence is mostly moderate. Observational studies link low vitamin D levels to reduced fertility in women (e.g., longer cycle length, lower oocyte quality) and men (lower sperm quality). Randomized controlled trials (RCTs) are fewer and show mixed results: some report improved live birth rates after supplementation, others no significant effect. The German Nutrition Society (DGE) recommends a 25-OH-D level of at least 50 nmol/l, but no specific fertility guidelines exist. Important: deficiency should be confirmed by blood test before supplementing, as long-term high doses (e.g., >100 µg/day) can be toxic. Individu","sources":[],"title":"Evidence check: Vitamin D 25-OH in the context of Fruchtbarkeit","url":"https://tikki.wiki/wissen/gesundheit/frage/public-d97cbf5d96ba4f13b2f32eb5/evidence-check-vitamin-d-25-oh-in-the-context-of-fruchtbarkeit/","verification":{"claim_support_verified":false,"human_reviewed":false,"quote_exact_match":false,"source_identity_verified":false,"tier":"existing_native_answer_privacy_screened_sources_pending"}}],"schema_version":"tikki.search-response.v1"}