Vitamin D, bone density and the Indian sun myth
Plenty of sunlight and still deficient. Skin pigmentation, receptor variants and indoor life all stack up, and the fix is more specific than going outside more.
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Endurance or power: training with your muscle profile
ACTN3 and friends do not decide whether you should exercise. They do hint at which sessions leave you stronger and which leave you flattened.
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Your genes are not your sentence
Sleep, stress, movement and food all change how loudly a gene is expressed. Epigenetics is the part of the story you actually control.
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Why the same diet makes one person thrive and another gain weight
Two people, one meal plan, opposite results. It is rarely willpower — carbohydrate handling, fat oxidation and satiety signalling are all partly inherited.
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