Independent editorial coverage of sports nutrition, athlete health and the science behind performance.
D-aspartic acid (DAA) is sold in the UK as a "natural testosterone booster", and the marketing is often far more confident than the…
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Casein is the "slow" milk protein, often taken before bed or between meals. Yet two tubs both labelled "casein" can differ substantially in…
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"Protein shakes will wreck your kidneys" is one of the most persistent gym myths, usually repeated with a mixture of concern and folklore.…
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Glutamine is the most abundant amino acid in the body and one of the longest-standing products on sports nutrition shelves. As we move past…
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Few areas of fitness are as crowded with folklore as training "for definition". High reps to carve out detail, endless crunches for a…
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Search for performance or weight-loss compounds online and you will quickly find websites selling "research chemicals" — powders, liquids…
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Leucine is often called the "trigger" amino acid for muscle building, and its role has been studied mostly in young men. Women who lift,…
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Few supplement ingredients have travelled as far as taurine — from a curiosity in 19th-century German chemistry to a staple of energy…
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Creatinine is one of the most commonly ordered blood tests in the NHS, used to estimate how well the kidneys are working. For people who…
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Collagen peptides have moved from beauty aisles into the kit bags of runners, footballers and lifters. Unlike many trendy supplements,…
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Psyllium — known in British pharmacies as ispaghula husk — has been used for generations as a gentle remedy for constipation. In midlife,…
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Hyaluronic acid is best known from skincare adverts, but it is also sold as an oral "joint supplement" and injected into knees in some…
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Regular exercise is one of the most effective ways to lower blood pressure, so a high reading in a fit, active person can come as a…
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When you diet down for a competition, a holiday or simply to get leaner, the fear of losing hard-earned muscle is real. HMB has long been…
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Crossing the finish line of a marathon is the end of months of preparation — and the start of a recovery process that many runners…
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