{"count":2,"index":{"built_at":"2026-07-28T07:49:55.945199+00:00","public_records":55311,"revision":"8dc36eaa002a1d38b48f4b89"},"query":{"area":null,"kind":null,"lang":null,"limit":10,"match_mode":"all_terms","q":"Evidence check: Vitamin D 25-OH in the context of Schlaf"},"results":[{"answer":"Measurement of 25-hydroxyvitamin D (25-OH) is the standard biomarker for vitamin D status. Observational studies have linked low vitamin D levels to sleep disturbances such as shorter sleep duration, poorer sleep quality, and increased daytime sleepiness. However, the evidence is largely associative and not causal. Randomized controlled trials (RCTs) on vitamin D supplementation for sleep show mixed results: some report modest improvements in sleep quality, while others find no significant effect. Potential mechanisms involve vitamin D receptors in brain regions regulating sleep-wake cycles and anti-inflammatory pathways. A MyBody-X test can provide your 25-OH level, but its utility for sleep issues is limited. Sleep is multifactorial, influenced by stress, sleep hygiene, mental health, and other nutrients. A single vitamin D measurement does not replace a medical evaluation. If deficiency is confirmed, supplementation is recommended, but sleep improvement is not guaranteed. Evidence grade: mixed (observational studies, few RCTs).","area":"gesundheit","canonical_id":"gesundheit:canonical-71b2d1f4b16b302ececc02cb","id":"public-05239f061e86d202204c825b","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: Vitamin D 25-OH in the context of Schlaf","score":24.41866178,"snippet":"Measurement of 25-hydroxyvitamin D (25-OH) is the standard biomarker for vitamin D status. Observational studies have linked low vitamin D levels to sleep disturbances such as shorter sleep duration, poorer sleep quality, and increased daytime sleepiness. However, the evidence is largely associative and not causal. Randomized controlled trials (RCTs) on vitamin D supplementation for sleep show mixed results: some report modest improvements in sleep quality, while others find no significant effect. Potential mechanisms involve vitamin D receptors in brain regions regulating sleep-wake cycles and anti-inflammatory pathways. A MyBody-X test can provide your 25-OH level, but its utility for slee","sources":[],"title":"Evidence check: Vitamin D 25-OH in the context of Schlaf","url":"https://tikki.wiki/wissen/gesundheit/frage/public-05239f061e86d202204c825b/evidence-check-vitamin-d-25-oh-in-the-context-of-schlaf/","verification":{"claim_support_verified":false,"human_reviewed":false,"quote_exact_match":false,"source_identity_verified":false,"tier":"existing_native_answer_privacy_screened_sources_pending"}},{"answer":"The question of a Vitamin D test in the context of sleep is legitimate, but the evidence requires careful differentiation. Observational studies show associations between low vitamin D levels (25-hydroxyvitamin D) and sleep disturbances such as shortened sleep duration, poorer sleep quality, and increased daytime sleepiness. However, causality is not clearly established: randomized controlled trials (RCTs) of vitamin D supplementation show mixed results, and effects on sleep are generally small or non-significant. A blood test for 25(OH)D is the clinical standard for assessing vitamin D status. Direct-to-consumer genetic tests for variants in genes like VDR, GC, or CYP2R1, which influence vitamin D metabolism, are not validated for sleep assessment. The associations are weak and polygenic, with low individual predictive power. Moreover, routine vitamin D screening in the general population without specific risk factors is not recommended by guidelines (e.g., US Preventive Services Task Force). For individuals with sleep issues, it is more appropriate to measure 25(OH)D via blood test if deficiency is suspected (e.g., dark skin, low sun exposure, obesity). A genetic test provides no added value. Conclusion: Vitamin D tests (blood) can be useful in individual cases, but the evidence for a causal link with sleep is moderate. Genetic tests are not indicated.","area":"gesundheit","canonical_id":"gesundheit:canonical-76249b22b82e1eeadc56c224","id":"public-9c9d31cda6223222c7fca60b","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: Vitamin D Test in the context of Schlaf","score":23.00928927,"snippet":"The question of a Vitamin D test in the context of sleep is legitimate, but the evidence requires careful differentiation. Observational studies show associations between low vitamin D levels (25-hydroxyvitamin D) and sleep disturbances such as shortened sleep duration, poorer sleep quality, and increased daytime sleepiness. However, causality is not clearly established: randomized controlled trials (RCTs) of vitamin D supplementation show mixed results, and effects on sleep are generally small or non-significant. A blood test for 25(OH)D is the clinical standard for assessing vitamin D status. Direct-to-consumer genetic tests for variants in genes like VDR, GC, or CYP2R1, which influence vi","sources":[],"title":"Evidence check: Vitamin D Test in the context of Schlaf","url":"https://tikki.wiki/wissen/gesundheit/frage/public-9c9d31cda6223222c7fca60b/evidence-check-vitamin-d-test-in-the-context-of-schlaf/","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"}