{"count":10,"index":{"built_at":"2026-07-27T23:12:25.940737+00:00","public_records":55311,"revision":"d0569be7a6ba7a597113d17c"},"query":{"area":null,"kind":null,"lang":null,"limit":10,"match_mode":"all_terms","q":"Evidence check: Vitamin D Test in the context of longevity"},"results":[{"answer":"A vitamin D test measures 25-hydroxyvitamin D levels in blood. For longevity, vitamin D is relevant due to its roles in immune function, bone health, and cell regulation. Observational studies link low vitamin D levels with higher all-cause mortality, but randomized controlled trials have not consistently shown that supplementation extends lifespan. Thus, the evidence is mixed: the test itself is clinically validated (e.g., for osteoporosis risk), but its predictive value for longevity is limited. Consumer tests are reliable for measurement, but interpretation must consider lifestyle, sun exposure, and individual risk factors. A single vitamin D value without other biomarkers (e.g., calcium, PTH) is insufficient for a longevity strategy. Caution: normal levels do not guarantee low risk, and supplementation without deficiency may be unnecessary. Evidence: mixed – robust lab measurement, but weak direct link to longevity.","area":"gesundheit","canonical_id":"gesundheit:canonical-8c16781fb0c1e0353f0a44f4","id":"public-72ae914fce4fa91677a2cefe","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: Vitamin D Test in the context of longevity","score":17.2907878,"snippet":"A vitamin D test measures 25-hydroxyvitamin D levels in blood. For longevity, vitamin D is relevant due to its roles in immune function, bone health, and cell regulation. Observational studies link low vitamin D levels with higher all-cause mortality, but randomized controlled trials have not consistently shown that supplementation extends lifespan. Thus, the evidence is mixed: the test itself is clinically validated (e.g., for osteoporosis risk), but its predictive value for longevity is limited. Consumer tests are reliable for measurement, but interpretation must consider lifestyle, sun exposure, and individual risk factors. A single vitamin D value without other biomarkers (e.g., calcium,","sources":[],"title":"Evidence check: Vitamin D Test in the context of longevity","url":"https://tikki.wiki/wissen/gesundheit/frage/public-72ae914fce4fa91677a2cefe/evidence-check-vitamin-d-test-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) 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":17.21237809,"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":"A vitamin D level of 18 ng/mL indicates insufficiency (optimal: 30–50 ng/mL). Supplementation is often warranted, but stay below 4,000 IU/day without medical supervision. Vitamin D acts through the VDR (vitamin D receptor). Genetic variants in the VDR gene (e.g., rs2228570, rs1544410) can modestly affect receptor function, but they rarely explain such a low level. The main causes are usually inadequate sun exposure or diet. In the context of longevity, observational studies link adequate vitamin D status to lower all-cause mortality, but the evidence is not causal. DNA tests can detect VDR variants, but they cannot replace blood testing. Supplement decisions should be guided by blood levels, not genetics. Caveat: marketing often overstates the impact of single VDR SNPs on lifespan.","area":"gesundheit","canonical_id":"gesundheit:canonical-10578f50809d8d2cc8f633cc","id":"public-31e21c464b8e77258f02838b","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: VDR in the context of longevity","score":17.10725603,"snippet":"A vitamin D level of 18 ng/mL indicates insufficiency (optimal: 30–50 ng/mL). Supplementation is often warranted, but stay below 4,000 IU/day without medical supervision. Vitamin D acts through the VDR (vitamin D receptor). Genetic variants in the VDR gene (e.g., rs2228570, rs1544410) can modestly affect receptor function, but they rarely explain such a low level. The main causes are usually inadequate sun exposure or diet. In the context of longevity, observational studies link adequate vitamin D status to lower all-cause mortality, but the evidence is not causal. DNA tests can detect VDR variants, but they cannot replace blood testing. Supplement decisions should be guided by blood levels,","sources":[],"title":"Evidence check: VDR in the context of longevity","url":"https://tikki.wiki/wissen/gesundheit/frage/public-31e21c464b8e77258f02838b/evidence-check-vdr-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 provided context contains no specific data or studies on VKORC1 in relation to longevity. VKORC1 encodes vitamin K epoxide reductase, a key enzyme in the vitamin K cycle, best known for its role in warfarin sensitivity. In longevity research, vitamin K is increasingly discussed for its role in activating matrix Gla protein (MGP) and inhibiting vascular calcification – a potential mechanism for cardiovascular health in aging. However, these links are based mostly on mechanistic and epidemiological data; robust GWAS or interventional studies directly associating VKORC1 variants with extended lifespan are lacking. The evidence is therefore rated as 'mechanistic' to 'unclear'. Without concrete lab results or clinical trials from the context, any claim remains speculative. Consumers should be aware that DNA tests for VKORC1 are primarily validated for pharmacogenetics (warfarin dosing), not for longevity prediction. Lifestyle factors (diet, exercise, stress management) currently have a far greater impact on healthy lifespan than single gene variants.","area":"gesundheit","canonical_id":"gesundheit:canonical-04206a6cb5e365240e02e5b3","id":"public-54503b820f384cc4b9ba6b3d","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: VKORC1 in the context of longevity","score":17.08121941,"snippet":"The provided context contains no specific data or studies on VKORC1 in relation to longevity. VKORC1 encodes vitamin K epoxide reductase, a key enzyme in the vitamin K cycle, best known for its role in warfarin sensitivity. In longevity research, vitamin K is increasingly discussed for its role in activating matrix Gla protein (MGP) and inhibiting vascular calcification – a potential mechanism for cardiovascular health in aging. However, these links are based mostly on mechanistic and epidemiological data; robust GWAS or interventional studies directly associating VKORC1 variants with extended lifespan are lacking. The evidence is therefore rated as 'mechanistic' to 'unclear'. Without concre","sources":[],"title":"Evidence check: VKORC1 in the context of longevity","url":"https://tikki.wiki/wissen/gesundheit/frage/public-54503b820f384cc4b9ba6b3d/evidence-check-vkorc1-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 provided context contains no information on folic acid in relation to longevity. Folic acid (vitamin B9) is essential for cell division and DNA synthesis, but evidence for life extension through supplementation is weak. Some observational studies suggest potential cardiovascular benefits, while randomized controlled trials show no clear advantage for all-cause mortality. Moreover, high folic acid intake may pose risks in individuals with vitamin B12 deficiency. Consumer DNA tests for MTHFR variants are often marketed with exaggerated health claims without clinical validation for longevity. Without direct evidence from the context, the relevance for anti-aging remains unclear. A balanced diet with natural folate sources (e.g., leafy greens) is safer than high-dose supplements.","area":"gesundheit","canonical_id":"gesundheit:canonical-e5fdb99bdfa2e3031904dc36","id":"public-1a87869d91253bf81604cf32","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: Folsäure in the context of longevity","score":17.05133301,"snippet":"The provided context contains no information on folic acid in relation to longevity. Folic acid (vitamin B9) is essential for cell division and DNA synthesis, but evidence for life extension through supplementation is weak. Some observational studies suggest potential cardiovascular benefits, while randomized controlled trials show no clear advantage for all-cause mortality. Moreover, high folic acid intake may pose risks in individuals with vitamin B12 deficiency. Consumer DNA tests for MTHFR variants are often marketed with exaggerated health claims without clinical validation for longevity. Without direct evidence from the context, the relevance for anti-aging remains unclear. A balanced ","sources":[],"title":"Evidence check: Folsäure in the context of longevity","url":"https://tikki.wiki/wissen/gesundheit/frage/public-1a87869d91253bf81604cf32/evidence-check-folsaeure-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 MyBody-X DNA Longevity-Test analyzes genetic variants linked to aging processes, nutrient utilization, and detoxification – such as methylation, oxidative stress, and telomere maintenance. However, fatigue (Müdigkeit) is a multifactorial symptom often caused by sleep deprivation, stress, thyroid dysfunction, iron deficiency, or mental health issues. The test cannot directly measure any of these functional causes. At best, it may reveal genetic predispositions (e.g., slower histamine breakdown or impaired B‑vitamin activation) that could indirectly influence energy levels. The evidence for direct clinical prediction of fatigue from such genetic tests is weak – it relies mostly on mechanistic assumptions and marketing. A blood panel (including thyroid, vitamin D, iron, and B‑vitamins), plus a microbiome test, would be far more informative for fatigue workup. The Longevity-Test can serve as a complementary orientation but does not replace medical diagnostics.","area":"gesundheit","canonical_id":"gesundheit:canonical-3d13ecf1bde7ca430c4a8410","id":"public-7d07907325456d7befaf0a23","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: Longevity DNA Test in the context of Müdigkeit","score":16.97758902,"snippet":"The MyBody-X DNA Longevity-Test analyzes genetic variants linked to aging processes, nutrient utilization, and detoxification – such as methylation, oxidative stress, and telomere maintenance. However, fatigue (Müdigkeit) is a multifactorial symptom often caused by sleep deprivation, stress, thyroid dysfunction, iron deficiency, or mental health issues. The test cannot directly measure any of these functional causes. At best, it may reveal genetic predispositions (e.g., slower histamine breakdown or impaired B‑vitamin activation) that could indirectly influence energy levels. The evidence for direct clinical prediction of fatigue from such genetic tests is weak – it relies mostly on mechanis","sources":[],"title":"Evidence check: Longevity DNA Test in the context of Müdigkeit","url":"https://tikki.wiki/wissen/gesundheit/frage/public-7d07907325456d7befaf0a23/evidence-check-longevity-dna-test-in-the-context-of-muedigkeit/","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":"VKORC1 encodes the vitamin K epoxide reductase, crucial for recycling vitamin K, which activates proteins involved in blood coagulation and vascular calcification. In longevity research, VKORC1 is indirectly relevant: adequate vitamin K status supports arterial elasticity and bone health, both linked to healthy aging. However, the strongest evidence for VKORC1 variants comes from pharmacogenetics (warfarin sensitivity), not from lifespan studies. Common SNPs like rs9923231 and rs7294 alter enzyme activity and may modulate vitamin K requirements, but their impact on longevity is unclear and likely small. Observational studies suggest associations with cardiovascular calcification, but no direct GWAS or centenarian data confirm a role in extending lifespan. Therefore, a consumer DNA test for VKORC1 alone cannot predict longevity. Evidence grade: mechanistic/unclear. Caveat: Do not self-supplement high-dose vitamin K without medical guidance, especially if on anticoagulants.","area":"gesundheit","canonical_id":"gesundheit:canonical-7032b09abb46347af336ada3","id":"public-b8cecccb1fb947117b470d0e","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: VKORC1 in the context of Langlebigkeit","score":16.83078011,"snippet":"VKORC1 encodes the vitamin K epoxide reductase, crucial for recycling vitamin K, which activates proteins involved in blood coagulation and vascular calcification. In longevity research, VKORC1 is indirectly relevant: adequate vitamin K status supports arterial elasticity and bone health, both linked to healthy aging. However, the strongest evidence for VKORC1 variants comes from pharmacogenetics (warfarin sensitivity), not from lifespan studies. Common SNPs like rs9923231 and rs7294 alter enzyme activity and may modulate vitamin K requirements, but their impact on longevity is unclear and likely small. Observational studies suggest associations with cardiovascular calcification, but no dire","sources":[],"title":"Evidence check: VKORC1 in the context of Langlebigkeit","url":"https://tikki.wiki/wissen/gesundheit/frage/public-b8cecccb1fb947117b470d0e/evidence-check-vkorc1-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":"tTG IgA (tissue transglutaminase antibody) is a well-established biomarker for celiac disease, not directly for longevity. The evidence for diagnosing celiac disease is strong (human-strong), but the link to longevity is indirect and moderate. Untreated celiac disease can impair lifespan through chronic inflammation, malabsorption, and nutrient deficiencies (e.g., iron, vitamin D, B12). In the general asymptomatic population, screening for tTG IgA is controversial; guidelines recommend it only for at-risk groups (e.g., family history, type 1 diabetes). A positive test requires confirmation by duodenal biopsy. False positives can occur in other autoimmune conditions or infections. In the context of longevity, tTG IgA is not a routine marker; it is more relevant for investigating digestive complaints or unexplained deficiencies. A negative test does not rule out non-celiac gluten sensitivity. For comprehensive longevity assessment, markers like HbA1c, hs-CRP, vitamin D, omega-3 index, and hormone panels are more informative. The MyBody-X Men’s Wellness Check does not include tTG IgA; it focuses on metabolic and hormonal markers. In summary, tTG IgA is a specific diagnostic tool whose longevity relevance stems from preventing complications of undiagnosed celiac disease – not a direct longevity biomarker.","area":"gesundheit","canonical_id":"gesundheit:canonical-07e528e4c6f1a6b356648a95","id":"public-3211e0c803e90c7703480195","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: tTG IgA in the context of longevity","score":16.79729365,"snippet":"tTG IgA (tissue transglutaminase antibody) is a well-established biomarker for celiac disease, not directly for longevity. The evidence for diagnosing celiac disease is strong (human-strong), but the link to longevity is indirect and moderate. Untreated celiac disease can impair lifespan through chronic inflammation, malabsorption, and nutrient deficiencies (e.g., iron, vitamin D, B12). In the general asymptomatic population, screening for tTG IgA is controversial; guidelines recommend it only for at-risk groups (e.g., family history, type 1 diabetes). A positive test requires confirmation by duodenal biopsy. False positives can occur in other autoimmune conditions or infections. In the cont","sources":[],"title":"Evidence check: tTG IgA in the context of longevity","url":"https://tikki.wiki/wissen/gesundheit/frage/public-3211e0c803e90c7703480195/evidence-check-ttg-iga-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":"FUT2 (fucosyltransferase 2) determines secretor status and influences gut microbiome composition as well as vitamin B12 absorption. Some GWAS studies have linked FUT2 variants to B12 levels, which could indirectly affect longevity through homocysteine regulation. However, the evidence for a direct connection to lifespan is weak and based on population genetic correlations rather than causal effects. MyBody-X tests can detect these variants, but interpretation in the context of longevity is speculative. Results should not be used as medical predictions. A healthy lifestyle (diet, exercise, stress management) has a far greater impact on life expectancy than individual FUT2 variants. Evidence grade: human-moderate (GWAS).","area":"gesundheit","canonical_id":"gesundheit:canonical-3563309937c40481b83c9168","id":"public-96d8c4d8e46f0af61622558c","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: FUT2 in the context of longevity","score":16.73363581,"snippet":"FUT2 (fucosyltransferase 2) determines secretor status and influences gut microbiome composition as well as vitamin B12 absorption. Some GWAS studies have linked FUT2 variants to B12 levels, which could indirectly affect longevity through homocysteine regulation. However, the evidence for a direct connection to lifespan is weak and based on population genetic correlations rather than causal effects. MyBody-X tests can detect these variants, but interpretation in the context of longevity is speculative. Results should not be used as medical predictions. A healthy lifestyle (diet, exercise, stress management) has a far greater impact on life expectancy than individual FUT2 variants. Evidence g","sources":[],"title":"Evidence check: FUT2 in the context of longevity","url":"https://tikki.wiki/wissen/gesundheit/frage/public-96d8c4d8e46f0af61622558c/evidence-check-fut2-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 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":16.72122554,"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"}