A
ACEThe endurance geneInfluences cardiovascular efficiency and endurance response to trainingACTN3The sprinter geneInfluences whether muscles lean toward power or enduranceADORA2AThe caffeine-sensitivity geneSets how strongly your brain feels caffeineAMY1The starch geneControls how much carb-digesting enzyme your saliva makesAPOEThe fat-and-brain geneAffects how you handle dietary fat and certain long-term risks
C
One honest line, on every page. Each entry describes a research-backed tendency, not a diagnosis. Carrying a variant tells you how your body is likely to lean, it does not label you, and nothing here is a substitute for a doctor where a medical question is involved.