Ph D L-Leucine capsules (90) is the most key branched chain amino acids (BCAA) & has been used by most sporting professionals. L-Lecuine cannot be produced in the body & therefore must be obtained through your diet. This is why these are a great convenient source for that. L-Leucine is around 8% of the total amino acid count in your body. Ph D Nutrition Beta Alanine 90ct Ph D Nutrition Beta Alanine 90ct is a non essential amino acid & is the only natural occuring beta amino. This product works well with L-Histidine & will increase carnosine concentration in the skeletal muscle. This will help energise your muscles while participating in sports that are explosive & intense. If you re looking to lift for longer at a intense pace, this is a great product to help you through it.