XTEND has been bringing a comprehensive range of nutritional supplements to athletes for more than 10 years. It used to belong to Scivation, but rebranded to XTEND at the end of 2019. Its best-selling products include instant amino acid mixtures designed to regenerate muscle mass. These contain scientifically and clinically tested ingredients for the best results in muscle tissue recovery. A key component of each product is the amino acids leucine, isoleucine and valine supplemented with stimulants, vitamins and electrolytes, which make XTEND the world leader in BCAA mixes sales.