{"count":10,"index":{"built_at":"2026-07-27T16:26:51.941466+00:00","public_records":55311,"revision":"5ea2bf7c32b7b68220b9b9b9"},"query":{"area":null,"kind":null,"lang":null,"limit":10,"match_mode":"all_terms","q":"Evidence check: FTO in the context of sleep"},"results":[{"answer":"The link between FTO variants and sleep is less clear than the well-established association with BMI and obesity. Some GWAS studies (e.g., on sleep duration or chronotype) have identified FTO as one of many loci, but with very small effect sizes. Most of these associations disappear or are greatly attenuated after adjusting for BMI, suggesting that the effect on sleep may be mediated indirectly through body composition. There are no robust intervention studies showing that FTO variants directly affect sleep quality or architecture. Consumer DNA tests tend to overstate such connections. In practice, an FTO risk allele should not be used as a sole explanation for sleep issues. Lifestyle factors (diet, exercise, sleep hygiene) have a far greater impact. Evidence: human-moderate (GWAS, but small effects and possible confounding).","area":"gesundheit","canonical_id":"gesundheit:canonical-ee604f73032be3c310cf2ef0","id":"public-b52e343dc52f8b407b4baecb","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: FTO in the context of sleep","score":18.86357579,"snippet":"The link between FTO variants and sleep is less clear than the well-established association with BMI and obesity. Some GWAS studies (e.g., on sleep duration or chronotype) have identified FTO as one of many loci, but with very small effect sizes. Most of these associations disappear or are greatly attenuated after adjusting for BMI, suggesting that the effect on sleep may be mediated indirectly through body composition. There are no robust intervention studies showing that FTO variants directly affect sleep quality or architecture. Consumer DNA tests tend to overstate such connections. In practice, an FTO risk allele should not be used as a sole explanation for sleep issues. Lifestyle factor","sources":[],"title":"Evidence check: FTO in the context of sleep","url":"https://tikki.wiki/wissen/gesundheit/frage/public-b52e343dc52f8b407b4baecb/evidence-check-fto-in-the-context-of-sleep/","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 FTO gene (fat mass and obesity associated) is primarily known for its strong link to obesity and BMI. In the context of sleep, the evidence is much weaker and inconsistent. Some GWAS have reported associations between FTO variants and sleep duration or quality, but these effects are typically small and often mediated by BMI – meaning sleep issues may be a consequence of higher body weight rather than a direct genetic effect. Other studies find no significant association after adjusting for BMI. MyBody-X DNA tests are not medical diagnostic devices; they provide informational genetic predispositions, not clinical sleep diagnoses. The predictive power of single SNPs is limited, ancestry-dependent, and should not be used as the sole basis for sleep optimization. For sleep disorders, a medical evaluation (e.g., sleep study) is recommended. Overall: FTO is not a strong sleep gene; focus should be on lifestyle factors like light exposure, sleep hygiene, and weight management.","area":"gesundheit","canonical_id":"gesundheit:canonical-eae57e1302121da0ea5de4e5","id":"public-bc003abfd437df76a173e55a","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: FTO in the context of Schlaf","score":18.75629478,"snippet":"The FTO gene (fat mass and obesity associated) is primarily known for its strong link to obesity and BMI. In the context of sleep, the evidence is much weaker and inconsistent. Some GWAS have reported associations between FTO variants and sleep duration or quality, but these effects are typically small and often mediated by BMI – meaning sleep issues may be a consequence of higher body weight rather than a direct genetic effect. Other studies find no significant association after adjusting for BMI. MyBody-X DNA tests are not medical diagnostic devices; they provide informational genetic predispositions, not clinical sleep diagnoses. The predictive power of single SNPs is limited, ancestry-de","sources":[],"title":"Evidence check: FTO in the context of Schlaf","url":"https://tikki.wiki/wissen/gesundheit/frage/public-bc003abfd437df76a173e55a/evidence-check-fto-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":"FTO is a gene associated with obesity in GWAS, but with a small effect size (~0.4 kg/m² per risk allele). There is no direct causal evidence linking FTO variants to fatigue. Fatigue may arise secondarily from obesity-related conditions (e.g., sleep apnea), but FTO alone is not a predictor. The evidence for an FTO-fatigue connection is indirect and weak. Lifestyle factors (diet, exercise, sleep) have a much larger impact. MyBody-X tests include FTO, but interpretation should be cautious: no clinical recommendation for fatigue can be derived from FTO. Caveat: population specificity of GWAS results. Source: ENSG00000140718.","area":"gesundheit","canonical_id":"gesundheit:canonical-dd87c76a21be3a72c2fd2a9d","id":"public-536968dc1d64599c5f0d0d81","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: FTO in the context of fatigue","score":18.53974897,"snippet":"FTO is a gene associated with obesity in GWAS, but with a small effect size (~0.4 kg/m² per risk allele). There is no direct causal evidence linking FTO variants to fatigue. Fatigue may arise secondarily from obesity-related conditions (e.g., sleep apnea), but FTO alone is not a predictor. The evidence for an FTO-fatigue connection is indirect and weak. Lifestyle factors (diet, exercise, sleep) have a much larger impact. MyBody-X tests include FTO, but interpretation should be cautious: no clinical recommendation for fatigue can be derived from FTO. Caveat: population specificity of GWAS results. Source: ENSG00000140718.","sources":[],"title":"Evidence check: FTO in the context of fatigue","url":"https://tikki.wiki/wissen/gesundheit/frage/public-536968dc1d64599c5f0d0d81/evidence-check-fto-in-the-context-of-fatigue/","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 link between FTO variants (e.g., rs9939609) and fatigue is indirect and weakly supported by evidence. FTO is strongly associated with fat mass and obesity risk; carriers of the risk allele tend to have slightly higher BMI and altered appetite regulation. Obesity can contribute to fatigue through sleep apnea, low-grade inflammation, and metabolic strain. However, a direct causal effect of FTO on tiredness or low energy is not established. The evidence is mechanistic (FTO involved in energy homeostasis) and epidemiological (BMI association), but insufficient for individual fatigue prediction. A consumer DNA test like MyBody-X can indicate obesity predisposition, but cannot diagnose fatigue causes. Clinical workup (thyroid, iron, sleep, stress) remains essential. Caveat: Fatigue is multifactorial; a single gene variant explains negligible variance.","area":"gesundheit","canonical_id":"gesundheit:canonical-676e908ffa8b583638dc0345","id":"public-c6959eb6bd657fbc304a6460","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: FTO in the context of Müdigkeit","score":18.32536209,"snippet":"The link between FTO variants (e.g., rs9939609) and fatigue is indirect and weakly supported by evidence. FTO is strongly associated with fat mass and obesity risk; carriers of the risk allele tend to have slightly higher BMI and altered appetite regulation. Obesity can contribute to fatigue through sleep apnea, low-grade inflammation, and metabolic strain. However, a direct causal effect of FTO on tiredness or low energy is not established. The evidence is mechanistic (FTO involved in energy homeostasis) and epidemiological (BMI association), but insufficient for individual fatigue prediction. A consumer DNA test like MyBody-X can indicate obesity predisposition, but cannot diagnose fatigue","sources":[],"title":"Evidence check: FTO in the context of Müdigkeit","url":"https://tikki.wiki/wissen/gesundheit/frage/public-c6959eb6bd657fbc304a6460/evidence-check-fto-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":"The SLIM DNA-Test (or similar weight-loss genetic tests) often claims personalized recommendations based on variants like FTO, MC4R, or VDR. However, the scientific evidence is limited: FTO rs9939609 (A allele) is associated with higher BMI (GWAS p=4e-51), but the effect per allele is only ~0.3 BMI units. A direct impact on sleep quality or chronotype is not established – only an indirect link via sleep apnea in severe obesity. VDR variants affect vitamin D metabolism, and low vitamin D is linked to poorer sleep, but a causal effect on circadian rhythm is lacking. The Mediterranean-fiber diet, in contrast, shows robust human evidence for weight loss, reduced inflammation, and improved microbiome diversity – independent of genotype. Bottom line: A DNA test alone is insufficiently validated for weight loss and sleep. More actionable are biomarkers like HbA1c, hs-CRP, or blood vitamin D levels. Evidence is mixed: mechanistic and observational, but not strong enough for clinical recommendations.","area":"gesundheit","canonical_id":"gesundheit:canonical-82acd24271d458c7aa5edf5f","id":"public-0e07f7d7130aa4895e835326","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: WeightLoss | SLIM DNA-Test in the context of Schlaf","score":17.8219135,"snippet":"The SLIM DNA-Test (or similar weight-loss genetic tests) often claims personalized recommendations based on variants like FTO, MC4R, or VDR. However, the scientific evidence is limited: FTO rs9939609 (A allele) is associated with higher BMI (GWAS p=4e-51), but the effect per allele is only ~0.3 BMI units. A direct impact on sleep quality or chronotype is not established – only an indirect link via sleep apnea in severe obesity. VDR variants affect vitamin D metabolism, and low vitamin D is linked to poorer sleep, but a causal effect on circadian rhythm is lacking. The Mediterranean-fiber diet, in contrast, shows robust human evidence for weight loss, reduced inflammation, and improved microb","sources":[],"title":"Evidence check: WeightLoss | SLIM DNA-Test in the context of Schlaf","url":"https://tikki.wiki/wissen/gesundheit/frage/public-0e07f7d7130aa4895e835326/evidence-check-weightloss-slim-dna-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"}},{"answer":"The query asks for an evidence check on a 'Nährstoffcheck' (nutrient check) in the context of sleep. The provided context documents contain no specific studies or validated information on DNA-based nutrient checks and their impact on sleep. Documents on MY FOODBOOK and general DNA tests indicate that personalized dietary recommendations based on genetic variants (e.g., FTO, MTHFR, APOE) have weak scientific support. Evidence for clinically meaningful sleep improvement from such tests is absent. The FOOD4ME RCT (2024) suggests low clinical utility. Consumers should be aware that most of these tests are marketing products and cannot replace evidence-based sleep advice. Safety note: Persistent sleep issues warrant medical evaluation, not a DNA test.","area":"gesundheit","canonical_id":"gesundheit:canonical-993e32f086427eb68ed717fb","id":"public-27c3e0c54c9b42d7894ae4a8","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: Nährstoffcheck in the context of sleep","score":17.80813188,"snippet":"The query asks for an evidence check on a 'Nährstoffcheck' (nutrient check) in the context of sleep. The provided context documents contain no specific studies or validated information on DNA-based nutrient checks and their impact on sleep. Documents on MY FOODBOOK and general DNA tests indicate that personalized dietary recommendations based on genetic variants (e.g., FTO, MTHFR, APOE) have weak scientific support. Evidence for clinically meaningful sleep improvement from such tests is absent. The FOOD4ME RCT (2024) suggests low clinical utility. Consumers should be aware that most of these tests are marketing products and cannot replace evidence-based sleep advice. Safety note: Persistent ","sources":[],"title":"Evidence check: Nährstoffcheck in the context of sleep","url":"https://tikki.wiki/wissen/gesundheit/frage/public-27c3e0c54c9b42d7894ae4a8/evidence-check-naehrstoffcheck-in-the-context-of-sleep/","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 contexts contain no direct evidence linking folic acid (folate) to sleep. Folate is a B vitamin involved in methylation and homocysteine metabolism. Some observational studies suggest a possible association between low folate levels and poor sleep quality, but the evidence is weak and inconsistent. Direct-to-consumer DNA tests claiming such a link typically rely on mechanistic or GWAS data with small effect sizes. The genes mentioned in the contexts (e.g., ZNF185, FTO) have no established connection to folate or sleep. Therefore, caution is warranted: supplementing folic acid for sleep improvement is not evidence-based. For sleep issues, consult a healthcare professional rather than relying on consumer genetic tests.","area":"gesundheit","canonical_id":"gesundheit:canonical-c39997aae8c8ec76bb1cbe69","id":"public-c72f214ee4383d15570bc0d2","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: Folsäure in the context of sleep","score":17.73992517,"snippet":"The provided contexts contain no direct evidence linking folic acid (folate) to sleep. Folate is a B vitamin involved in methylation and homocysteine metabolism. Some observational studies suggest a possible association between low folate levels and poor sleep quality, but the evidence is weak and inconsistent. Direct-to-consumer DNA tests claiming such a link typically rely on mechanistic or GWAS data with small effect sizes. The genes mentioned in the contexts (e.g., ZNF185, FTO) have no established connection to folate or sleep. Therefore, caution is warranted: supplementing folic acid for sleep improvement is not evidence-based. For sleep issues, consult a healthcare professional rather ","sources":[],"title":"Evidence check: Folsäure in the context of sleep","url":"https://tikki.wiki/wissen/gesundheit/frage/public-c72f214ee4383d15570bc0d2/evidence-check-folsaeure-in-the-context-of-sleep/","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 combination of weight-loss DNA testing with sleep context has weak scientific support. While genes like BMAL1 (circadian rhythm), FTO (weight regulation), and ADRB3 (metabolism) have variants with small effects, these are often overshadowed by lifestyle factors. No validated 'WeightLoss Slim DNA' test specifically for sleep exists in the literature. Evidence is mostly mechanistic or marketing-based, not from randomized trials. Sleep quality and duration clearly affect hunger hormones (ghrelin, leptin) and energy expenditure, but a genetic test cannot reliably predict this complex interaction. Conservative advice: focus on consistent sleep timing, morning light exposure, and balanced diet. A DNA test may serve as a clue but should not drive drastic diet or sleep changes. Caveat: most commercial tests overstate clinical relevance. Consult a doctor for serious sleep or weight issues.","area":"gesundheit","canonical_id":"gesundheit:canonical-5aaec9c7f05ad9740524aea3","id":"public-1d2ae857de52138401e011d0","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: WeightLoss Slim DNA in the context of sleep","score":17.63231379,"snippet":"The combination of weight-loss DNA testing with sleep context has weak scientific support. While genes like BMAL1 (circadian rhythm), FTO (weight regulation), and ADRB3 (metabolism) have variants with small effects, these are often overshadowed by lifestyle factors. No validated 'WeightLoss Slim DNA' test specifically for sleep exists in the literature. Evidence is mostly mechanistic or marketing-based, not from randomized trials. Sleep quality and duration clearly affect hunger hormones (ghrelin, leptin) and energy expenditure, but a genetic test cannot reliably predict this complex interaction. Conservative advice: focus on consistent sleep timing, morning light exposure, and balanced diet","sources":[],"title":"Evidence check: WeightLoss Slim DNA in the context of sleep","url":"https://tikki.wiki/wissen/gesundheit/frage/public-1d2ae857de52138401e011d0/evidence-check-weightloss-slim-dna-in-the-context-of-sleep/","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":"FTO (fat mass and obesity-associated) gene variants, particularly rs9939609, are among the most replicated genetic markers for obesity risk. In the context of stress, some studies have explored whether FTO variants modulate stress-induced eating, cortisol responses, or weight gain under chronic stress. However, the evidence is limited and inconsistent. While there is strong GWAS evidence linking FTO to BMI and adiposity, the specific interaction with stress remains largely mechanistic or exploratory. Consumer DNA tests often market FTO as a 'stress eating' or 'comfort food' gene, but this oversimplifies the biology. Stress influences eating behavior through multiple pathways (cortisol, dopamine, etc.), and FTO's role is likely small and context-dependent. No clinical guidelines currently recommend FTO testing for stress management. Lifestyle factors (diet, sleep, exercise) and stress reduction techniques have far greater impact. Therefore, while the biology is plausible, the evidence for a direct FTO-stress link is weak and should not drive clinical decisions.","area":"gesundheit","canonical_id":"gesundheit:canonical-08caa202c7f4328eebc57016","id":"public-dec4fe4f960432f36e5a40b6","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: FTO in the context of stress","score":17.61420929,"snippet":"FTO (fat mass and obesity-associated) gene variants, particularly rs9939609, are among the most replicated genetic markers for obesity risk. In the context of stress, some studies have explored whether FTO variants modulate stress-induced eating, cortisol responses, or weight gain under chronic stress. However, the evidence is limited and inconsistent. While there is strong GWAS evidence linking FTO to BMI and adiposity, the specific interaction with stress remains largely mechanistic or exploratory. Consumer DNA tests often market FTO as a 'stress eating' or 'comfort food' gene, but this oversimplifies the biology. Stress influences eating behavior through multiple pathways (cortisol, dopam","sources":[],"title":"Evidence check: FTO in the context of stress","url":"https://tikki.wiki/wissen/gesundheit/frage/public-dec4fe4f960432f36e5a40b6/evidence-check-fto-in-the-context-of-stress/","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 direct evidence linking the FADS1 gene to sleep. FADS1 encodes a delta-5 desaturase involved in omega-3 and omega-6 fatty acid metabolism. While a theoretical connection via inflammation or lipid signaling could influence sleep quality, robust human studies are lacking. The knowledge snippets cover other genes (ACTN3, MTHFR, FTO, ACE) and topics like sports genetics, blood draw protocols, or statin side effects – none address FADS1 or sleep. Consumer DNA tests like MyBody-X may include FADS1 SNPs, but effect sizes on complex traits such as sleep are very small and not actionable. Evidence: unclear, as no specific studies or guidelines are cited. Prioritizing sleep hygiene, stress reduction, and medical evaluation for sleep disorders is more evidence-based than genetic testing. Without strong data, dietary or supplement changes based solely on FADS1 results are not recommended.","area":"gesundheit","canonical_id":"gesundheit:canonical-0965ce4b101def1980ec71a9","id":"public-d4ef57c88dbc3a8962a3f380","kind":"qa","language":"en","publication_status":"existing_native_answer_privacy_screened_sources_pending","question":"Evidence check: FADS1 in the context of Schlaf","score":17.42477286,"snippet":"The provided context contains no direct evidence linking the FADS1 gene to sleep. FADS1 encodes a delta-5 desaturase involved in omega-3 and omega-6 fatty acid metabolism. While a theoretical connection via inflammation or lipid signaling could influence sleep quality, robust human studies are lacking. The knowledge snippets cover other genes (ACTN3, MTHFR, FTO, ACE) and topics like sports genetics, blood draw protocols, or statin side effects – none address FADS1 or sleep. Consumer DNA tests like MyBody-X may include FADS1 SNPs, but effect sizes on complex traits such as sleep are very small and not actionable. Evidence: unclear, as no specific studies or guidelines are cited. Prioritizing ","sources":[],"title":"Evidence check: FADS1 in the context of Schlaf","url":"https://tikki.wiki/wissen/gesundheit/frage/public-d4ef57c88dbc3a8962a3f380/evidence-check-fads1-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"}