Gen-Tec have made a 100% pure pharmaceutical grade L-Lysine powder. Lysine is essential to producing carnitine (a nutrient that helps you convert fatty acids into energy). It also helps your body process and absorb calcium, and is important in your body forming collagen, so you need it for healthy bones, skin, tendons and cartilage. You can use this as an additive to your shake if you're feeling tired, or mix it in with some of the other products in the Gen-Tec pharmaceutical range to make your own custom supplement!