BCAA supplements contain free-form leucine, isoleucine and valine, which have an ultra-rapid absorption rate and potency. You’re likely to get the most benefit if you take them just prior to, during and after exercise. With this in mind, many BCAA products are available as a powder which you simply mix with water to create a delicious and refreshing beverage. Factoring these into your routine introduces a degree of ‘damage control’, and helps to achieve an anabolic (muscle-building) state. Alternatively, you can get them in capsule of liquid form.