Aminos are essential and your body doesn't produce them itself. You have to supplement them in with red meat or easier, aminos. I like that Whole Foods carry this product but Best Price Nutrition is about 1/4th of the price!! I usually trust products that whole foods stocks. I like using aminos while Im training so I don't get too hungry and also so I don't burn muscle if my training goes too long. Its perfect for recovery. I recommend this product to anyone weight training or cardio training. Its great for lean muscle!