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PROTEIN SUPPLEMENTS Protein is not only found in both animal and plant-based foods but is also available in a variety of supplement powders, drinks and protein bars. Protein supplements are not essential for everyone but may be helpful as part of the overall nutrition plan. The amino acid ‘leucine’ stimulates muscle protein synthesis, with highest levels found in milk (and whey protein) and red meat. Just 2-3g of leucine is equivalent to 20-25g of high biological value protein in terms of its capacity to stimulate protein synthesis. Although heavily training endurance athletes, strength athletes and individuals are training to try and gain muscle mass, all have higher protein requirements and normal eating habits are often enough to meet requirements. It is strongly advised that athletes consult an Accredited Practising Dietitian to ensure that their protein and ov