{"count":3,"index":{"built_at":"2026-07-28T06:48:05.484700+00:00","public_records":55311,"revision":"7fbeee94fe60cc8b67f1532a"},"query":{"area":null,"kind":null,"lang":null,"limit":10,"match_mode":"all_terms","q":"Evidence check: Vitamin D 25-OH in the context of longevity"},"results":[{"answer":"The evidence for vitamin D (25-OH) as a direct longevity factor is mixed. Observational studies consistently show that low 25(OH)D levels (< 30 nmol/l) are associated with increased all-cause mortality, even after adjusting for age, comorbidities, and lifestyle. Mechanistically, vitamin D influences calcium homeostasis, immune function, inflammation regulation, and cell differentiation, which could theoretically modulate aging-related processes. However, randomized controlled trials (RCTs) of vitamin D supplementation in generally healthy adults without proven deficiency have not demonstrated a significant survival benefit. Post-hoc analyses suggest potential benefit in those with very low baseline levels, but overall evidence does not support a general recommendation for longevity enhancement. Importantly, very high doses (> 4000 IU/day long-term) can be toxic (hypercalcemia, kidney stones). A 25(OH) blood test is useful to rule out deficiency before starting supplementation. The evidence grade is therefore 'mixed': strong association in observational data but weak to absent confirmation in interventions for the endpoint longevity.","area":"gesundheit","canonical_id":"gesundheit:canonical-d9396fbdf49d7c2ff05e06a7","id":"public-8a88c4475890a672fb002e38","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: Vitamin D 25-OH in the context of longevity","score":26.43535444,"snippet":"The evidence for vitamin D (25-OH) as a direct longevity factor is mixed. Observational studies consistently show that low 25(OH)D levels (< 30 nmol/l) are associated with increased all-cause mortality, even after adjusting for age, comorbidities, and lifestyle. Mechanistically, vitamin D influences calcium homeostasis, immune function, inflammation regulation, and cell differentiation, which could theoretically modulate aging-related processes. However, randomized controlled trials (RCTs) of vitamin D supplementation in generally healthy adults without proven deficiency have not demonstrated a significant survival benefit. Post-hoc analyses suggest potential benefit in those with very low b","sources":[],"title":"Evidence check: Vitamin D 25-OH in the context of longevity","url":"https://tikki.wiki/wissen/gesundheit/frage/public-8a88c4475890a672fb002e38/evidence-check-vitamin-d-25-oh-in-the-context-of-longevity/","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 evidence for vitamin D (25-OH) in the context of longevity is mixed. Observational studies consistently link low 25-hydroxyvitamin D levels with higher all-cause mortality, especially in older adults. However, randomized controlled trials (RCTs) of vitamin D supplementation have not shown a clear benefit for extending lifespan. The VITAL trial (2019) found no significant reduction in total mortality with vitamin D3 (2000 IU/day) in generally healthy adults. Some subgroup analyses suggest potential benefits for those with very low baseline levels (<30 nmol/L), but this remains inconclusive. Additionally, measuring 25-OH vitamin D as a single biomarker for longevity is insufficient; there are no standardized cutoffs for 'optimal' levels regarding life extension. Correcting a deficiency (target >50 nmol/L) is prudent, but supplementing beyond sufficiency is not evidence-based. Caveat: MyBody-X tests are not diagnostic; consult a physician for abnormal results. Evidence grade: human-moderate (observational) to mixed (RCTs).","area":"gesundheit","canonical_id":"gesundheit:canonical-93b5a570c4529355d65c335a","id":"public-7275f6fc41f93b8e7368858b","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: Vitamin D 25-OH in the context of Langlebigkeit","score":25.81049151,"snippet":"The evidence for vitamin D (25-OH) in the context of longevity is mixed. Observational studies consistently link low 25-hydroxyvitamin D levels with higher all-cause mortality, especially in older adults. However, randomized controlled trials (RCTs) of vitamin D supplementation have not shown a clear benefit for extending lifespan. The VITAL trial (2019) found no significant reduction in total mortality with vitamin D3 (2000 IU/day) in generally healthy adults. Some subgroup analyses suggest potential benefits for those with very low baseline levels (<30 nmol/L), but this remains inconclusive. Additionally, measuring 25-OH vitamin D as a single biomarker for longevity is insufficient; there ","sources":[],"title":"Evidence check: Vitamin D 25-OH in the context of Langlebigkeit","url":"https://tikki.wiki/wissen/gesundheit/frage/public-7275f6fc41f93b8e7368858b/evidence-check-vitamin-d-25-oh-in-the-context-of-langlebigkeit/","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 evidence for a vitamin D test in the context of longevity is weak. While vitamin D is essential for bone health, immune function, and possibly inflammation modulation, a direct causal link between vitamin D testing (either blood levels or genetic variants) and extended lifespan is not supported by robust human studies. The provided context only mentions the VDR FokI polymorphism (rs2228570), whose connection to insulin resistance is rated as 'unclear'. Large RCTs (e.g., VITAL) show no significant reduction in all-cause mortality from vitamin D supplementation in healthy adults. Genetic testing for VDR variants does not provide clinically actionable information for longevity. Therefore, the evidence grade is 'unclear'. Practical advice: If deficiency is suspected, measure serum 25(OH)D and supplement according to guidelines, not based on DNA tests. Excessive vitamin D intake can be toxic (hypercalcemia).","area":"gesundheit","canonical_id":"gesundheit:canonical-fc454e0afa43a0a00fe61957","id":"public-8e8418a354769c5692d7c966","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: Vitamin D Test in the context of Langlebigkeit","score":23.4564702,"snippet":"The evidence for a vitamin D test in the context of longevity is weak. While vitamin D is essential for bone health, immune function, and possibly inflammation modulation, a direct causal link between vitamin D testing (either blood levels or genetic variants) and extended lifespan is not supported by robust human studies. The provided context only mentions the VDR FokI polymorphism (rs2228570), whose connection to insulin resistance is rated as 'unclear'. Large RCTs (e.g., VITAL) show no significant reduction in all-cause mortality from vitamin D supplementation in healthy adults. Genetic testing for VDR variants does not provide clinically actionable information for longevity. Therefore, t","sources":[],"title":"Evidence check: Vitamin D Test in the context of Langlebigkeit","url":"https://tikki.wiki/wissen/gesundheit/frage/public-8e8418a354769c5692d7c966/evidence-check-vitamin-d-test-in-the-context-of-langlebigkeit/","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"}