{"count":9,"index":{"built_at":"2026-07-28T02:21:08.940541+00:00","public_records":55311,"revision":"7e579521d52d2964f47c5732"},"query":{"area":null,"kind":null,"lang":null,"limit":10,"match_mode":"all_terms","q":"Evidence check: B12 in the context of Sport"},"results":[{"answer":"The provided context does not contain specific data or studies on vitamin B12 in sports. Generally, B12 is crucial for energy metabolism, red blood cell formation, and neurological function – a deficiency can impair athletic performance. However, the context lacks evidence for increased requirements in athletes or performance benefits from supplementation in non-deficient individuals. General literature shows moderate evidence: supplementation corrects deficiency-related declines, but no ergogenic effect in replete individuals. Since the context offers no sport-specific B12 research, the assessment remains conservative. Note: MyBody-X does not offer a dedicated B12 sport test; its nutrient deficiency test measures B12 but without sports interpretation. Evidence is rated as unclear.","area":"gesundheit","canonical_id":"gesundheit:canonical-cd58eb0d83ebeb69c7e725ad","id":"public-9d7e2eec061cf9d7a3453b77","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: B12 in the context of Sport","score":20.41374601,"snippet":"The provided context does not contain specific data or studies on vitamin B12 in sports. Generally, B12 is crucial for energy metabolism, red blood cell formation, and neurological function – a deficiency can impair athletic performance. However, the context lacks evidence for increased requirements in athletes or performance benefits from supplementation in non-deficient individuals. General literature shows moderate evidence: supplementation corrects deficiency-related declines, but no ergogenic effect in replete individuals. Since the context offers no sport-specific B12 research, the assessment remains conservative. Note: MyBody-X does not offer a dedicated B12 sport test; its nutrient d","sources":[],"title":"Evidence check: B12 in the context of Sport","url":"https://tikki.wiki/wissen/gesundheit/frage/public-9d7e2eec061cf9d7a3453b77/evidence-check-b12-in-the-context-of-sport/","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 vitamin B12 absorption. Some studies link FUT2 variants to B12 levels, which could theoretically affect energy metabolism and red blood cell production in athletes. However, there is no direct, robust evidence from sport-specific studies linking FUT2 variants to performance outcomes. The evidence is purely mechanistic: B12 is crucial for energy and erythropoiesis, but the impact of FUT2 polymorphisms on athletic performance is not supported by human trials. Consumer DNA tests often include FUT2 in nutrient metabolism panels, but the relevance for sport is weak. A blood test for B12 status would be more actionable. Caution: having a FUT2 variant does not guarantee deficiency or performance impairment.","area":"gesundheit","canonical_id":"gesundheit:canonical-5bdf038a9811be21dc9b3bc4","id":"public-504c71fd9c4c4380391082cf","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: FUT2 in the context of Sport","score":20.02340803,"snippet":"FUT2 (fucosyltransferase 2) determines secretor status and influences vitamin B12 absorption. Some studies link FUT2 variants to B12 levels, which could theoretically affect energy metabolism and red blood cell production in athletes. However, there is no direct, robust evidence from sport-specific studies linking FUT2 variants to performance outcomes. The evidence is purely mechanistic: B12 is crucial for energy and erythropoiesis, but the impact of FUT2 polymorphisms on athletic performance is not supported by human trials. Consumer DNA tests often include FUT2 in nutrient metabolism panels, but the relevance for sport is weak. A blood test for B12 status would be more actionable. Caution:","sources":[],"title":"Evidence check: FUT2 in the context of Sport","url":"https://tikki.wiki/wissen/gesundheit/frage/public-504c71fd9c4c4380391082cf/evidence-check-fut2-in-the-context-of-sport/","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 lacks specific data on homocysteine in sports. Generally, homocysteine is a cardiovascular risk marker influenced by folate, B12, and B6. Exercise may lower homocysteine, but evidence is mixed. Interpreting home test results without medical guidance is not recommended. Genetic variants (e.g., MTHFR) have limited predictive value for athletic performance or homocysteine management, as diet and lifestyle dominate. Evidence: mixed. Sources: none in given context.","area":"gesundheit","canonical_id":"gesundheit:canonical-bf4638d05488e4953098d0aa","id":"public-132aa28e22000c8f313f3018","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: Homocystein in the context of Sport","score":19.54419287,"snippet":"The provided context lacks specific data on homocysteine in sports. Generally, homocysteine is a cardiovascular risk marker influenced by folate, B12, and B6. Exercise may lower homocysteine, but evidence is mixed. Interpreting home test results without medical guidance is not recommended. Genetic variants (e.g., MTHFR) have limited predictive value for athletic performance or homocysteine management, as diet and lifestyle dominate. Evidence: mixed. Sources: none in given context.","sources":[],"title":"Evidence check: Homocystein in the context of Sport","url":"https://tikki.wiki/wissen/gesundheit/frage/public-132aa28e22000c8f313f3018/evidence-check-homocystein-in-the-context-of-sport/","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":"Folic acid (vitamin B9) is crucial for DNA synthesis, red blood cell production, and homocysteine metabolism. In sports, it is often linked to improved oxygen delivery and recovery. Evidence is moderate: some studies show benefits for endurance athletes with low baseline folate, but no consistent performance enhancement in well-nourished individuals. High doses can mask vitamin B12 deficiency, potentially leading to neurological issues. Therefore, testing folate status (e.g., serum folate, homocysteine) before supplementation is recommended. Most research focuses on endurance sports; data for strength or team sports are limited. Caveat: supplemental folic acid differs from natural food folate, and genetic variants (e.g., MTHFR) can affect conversion. Routine supplementation without confirmed deficiency is not evidence-based.","area":"gesundheit","canonical_id":"gesundheit:canonical-556d2e007aad6b9f15eda430","id":"public-e84ce9e9d2a0766dbc95f90f","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: Folsäure in the context of Sport","score":19.10045868,"snippet":"Folic acid (vitamin B9) is crucial for DNA synthesis, red blood cell production, and homocysteine metabolism. In sports, it is often linked to improved oxygen delivery and recovery. Evidence is moderate: some studies show benefits for endurance athletes with low baseline folate, but no consistent performance enhancement in well-nourished individuals. High doses can mask vitamin B12 deficiency, potentially leading to neurological issues. Therefore, testing folate status (e.g., serum folate, homocysteine) before supplementation is recommended. Most research focuses on endurance sports; data for strength or team sports are limited. Caveat: supplemental folic acid differs from natural food folat","sources":[],"title":"Evidence check: Folsäure in the context of Sport","url":"https://tikki.wiki/wissen/gesundheit/frage/public-e84ce9e9d2a0766dbc95f90f/evidence-check-folsaeure-in-the-context-of-sport/","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 IgA) is a well-established serological marker for celiac disease. In the context of sport, it is occasionally measured in athletes with unexplained gastrointestinal symptoms, fatigue, or performance decline. However, evidence for routine screening in asymptomatic athletes is weak. Celiac disease affects about 1% of the population, and undiagnosed cases can impair athletic performance due to malabsorption of iron, vitamin D, and B12. Yet tTG IgA is not a direct performance or recovery biomarker. A positive test requires gastroenterological follow-up with duodenal biopsy. False positives can occur, especially in IgA deficiency or other autoimmune conditions. Testing should be reserved for clinical suspicion, not as a general sports screening. Evidence is based on clinical practice and guidelines, not on specific sport studies. Caveat: A negative test does not rule out celiac disease, particularly in IgA deficiency (then IgG-based tests are needed).","area":"gesundheit","canonical_id":"gesundheit:canonical-ea109257269ed1f70da1b7a5","id":"public-c3143b52d4020e7a7414ce10","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: tTG IgA in the context of Sport","score":18.93954077,"snippet":"tTG IgA (tissue transglutaminase IgA) is a well-established serological marker for celiac disease. In the context of sport, it is occasionally measured in athletes with unexplained gastrointestinal symptoms, fatigue, or performance decline. However, evidence for routine screening in asymptomatic athletes is weak. Celiac disease affects about 1% of the population, and undiagnosed cases can impair athletic performance due to malabsorption of iron, vitamin D, and B12. Yet tTG IgA is not a direct performance or recovery biomarker. A positive test requires gastroenterological follow-up with duodenal biopsy. False positives can occur, especially in IgA deficiency or other autoimmune conditions. Te","sources":[],"title":"Evidence check: tTG IgA in the context of Sport","url":"https://tikki.wiki/wissen/gesundheit/frage/public-c3143b52d4020e7a7414ce10/evidence-check-ttg-iga-in-the-context-of-sport/","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 FUT2 variant determines whether you secrete blood group antigens into body fluids (secretor status). This influences gut microbiota composition and vitamin B12 absorption. In a sports context, non-secretor status (e.g., rs601338 A allele) may be linked to higher risk of B12 deficiency and altered immune response to respiratory infections – both potentially relevant for performance. However, these insights come mainly from population genetic and mechanistic studies; direct athletic performance data are lacking. Moreover, the effect of a single SNP is small. A FUT2 test alone does not warrant drastic training or diet changes. If you have deficiency symptoms or frequent infections, it is reasonable to check B12 levels clinically and focus on a balanced, microbiota-supporting diet. The evidence is currently rated as 'mechanistic'.","area":"gesundheit","canonical_id":"gesundheit:canonical-4979b1a2bf85ede301d453a5","id":"public-83b7de9506253e64188a2830","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"What to watch with FUT2 and Sport?","score":17.97100134,"snippet":"The FUT2 variant determines whether you secrete blood group antigens into body fluids (secretor status). This influences gut microbiota composition and vitamin B12 absorption. In a sports context, non-secretor status (e.g., rs601338 A allele) may be linked to higher risk of B12 deficiency and altered immune response to respiratory infections – both potentially relevant for performance. However, these insights come mainly from population genetic and mechanistic studies; direct athletic performance data are lacking. Moreover, the effect of a single SNP is small. A FUT2 test alone does not warrant drastic training or diet changes. If you have deficiency symptoms or frequent infections, it is re","sources":[],"title":"What to watch with FUT2 and Sport?","url":"https://tikki.wiki/wissen/gesundheit/frage/public-83b7de9506253e64188a2830/what-to-watch-with-fut2-and-sport/","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":"Based on the provided context, there is no information suggesting that a Fertility Check (Fruchtbarkeits-Test) is useful for assessing allergies. The context covers ferritin, B12, DNA tests for sports/longevity, and microbiome, but not fertility testing or allergy. A fertility test typically measures reproductive hormones (e.g., AMH, FSH) or genetic markers related to fertility, not allergy markers. Allergies are immune-mediated responses involving IgE, skin tests, or specific genetic variants (e.g., in the MHC region). There is no evidence that a fertility check can predict or diagnose allergies. The evidence level is unclear to marketing-driven. Consumers should not rely on such tests for allergy evaluation. For allergy concerns, clinical testing (skin prick, specific IgE) and an allergist consultation remain the gold standard.","area":"gesundheit","canonical_id":"gesundheit:canonical-d2c30ba98ba664e82c45d6ae","id":"public-b0a17003198b47df682fab5d","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Is Fertility Check | Fruchtbarkeits-Test useful for allergy?","score":17.40867264,"snippet":"Based on the provided context, there is no information suggesting that a Fertility Check (Fruchtbarkeits-Test) is useful for assessing allergies. The context covers ferritin, B12, DNA tests for sports/longevity, and microbiome, but not fertility testing or allergy. A fertility test typically measures reproductive hormones (e.g., AMH, FSH) or genetic markers related to fertility, not allergy markers. Allergies are immune-mediated responses involving IgE, skin tests, or specific genetic variants (e.g., in the MHC region). There is no evidence that a fertility check can predict or diagnose allergies. The evidence level is unclear to marketing-driven. Consumers should not rely on such tests for ","sources":[],"title":"Is Fertility Check | Fruchtbarkeits-Test useful for allergy?","url":"https://tikki.wiki/wissen/gesundheit/frage/public-b0a17003198b47df682fab5d/is-fertility-check-fruchtbarkeits-test-useful-for-allergy/","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 about which blood markers matter for a male hormone & vitality check cannot be specifically answered from the provided context – the snippets cover DNA tests, microbiome, and sports, not blood markers. From general medical practice, key markers include: total and free testosterone, SHBG, LH, FSH, estradiol, prolactin, vitamin D, vitamin B12, ferritin, TSH, and possibly cortisol and PSA. These assess hormonal balance, micronutrient status, and thyroid function. Evidence is based on endocrine guidelines and clinical practice, not on the given sources. Caveat: blood markers are not diagnostic; a physician should interpret results in context. MyBody-X offers such checks, but they are lifestyle tests, not medical devices. Results can serve as a screening tool but do not replace medical evaluation for symptoms like fatigue, low libido, or erectile dysfunction.","area":"gesundheit","canonical_id":"gesundheit:canonical-f53cbeee1c968b01d8d82735","id":"public-a723be254401e0bc252a457e","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Hormon & VitalCheck für Männer: which blood markers matter?","score":16.93714775,"snippet":"The question about which blood markers matter for a male hormone & vitality check cannot be specifically answered from the provided context – the snippets cover DNA tests, microbiome, and sports, not blood markers. From general medical practice, key markers include: total and free testosterone, SHBG, LH, FSH, estradiol, prolactin, vitamin D, vitamin B12, ferritin, TSH, and possibly cortisol and PSA. These assess hormonal balance, micronutrient status, and thyroid function. Evidence is based on endocrine guidelines and clinical practice, not on the given sources. Caveat: blood markers are not diagnostic; a physician should interpret results in context. MyBody-X offers such checks, but they ar","sources":[],"title":"Hormon & VitalCheck für Männer: which blood markers matter?","url":"https://tikki.wiki/wissen/gesundheit/frage/public-a723be254401e0bc252a457e/hormon-vitalcheck-fuer-maenner-which-blood-markers-matter/","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 how long blood test results take and which blood markers matter cannot be directly answered from the given context. The provided information covers specific genetic variants (e.g., rs8192678 in PPARGC1A for mitochondrial biogenesis), child microbiome tests, the Fitness | LifestyleCheck (which measures standard blood markers), and the MEDI CHECK for drug intolerances. None of these sources specify typical turnaround times for blood tests or a definitive list of important markers. In general, commercial blood tests (e.g., for fitness or health checks) return results within a few days to two weeks, depending on the lab and panel. Commonly measured markers include blood lipids (cholesterol, triglycerides), blood glucose (fasting glucose, HbA1c), inflammatory markers (CRP), liver and kidney function, vitamins (D, B12), and minerals (iron, magnesium). The relevance of specific markers depends heavily on the individual's goals (e.g., endurance sports, metabolic health). Without more specific context, the answer remains general. The evidence level is rated as 'unclear' because the provided context does not support a more precise response.","area":"gesundheit","canonical_id":"gesundheit:canonical-8cff9f366cadebfb5fe8344f","id":"public-ad19497a5bc8d8568f5c8ede","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"wie lange bis blutergebnisse da sind — which blood markers matter?","score":15.73052019,"snippet":"The question of how long blood test results take and which blood markers matter cannot be directly answered from the given context. The provided information covers specific genetic variants (e.g., rs8192678 in PPARGC1A for mitochondrial biogenesis), child microbiome tests, the Fitness | LifestyleCheck (which measures standard blood markers), and the MEDI CHECK for drug intolerances. None of these sources specify typical turnaround times for blood tests or a definitive list of important markers. In general, commercial blood tests (e.g., for fitness or health checks) return results within a few days to two weeks, depending on the lab and panel. Commonly measured markers include blood lipids (c","sources":[],"title":"wie lange bis blutergebnisse da sind — which blood markers matter?","url":"https://tikki.wiki/wissen/gesundheit/frage/public-ad19497a5bc8d8568f5c8ede/wie-lange-bis-blutergebnisse-da-sind-which-blood-markers-matter/","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"}