Here are some details about Testerectsome of the popular ones - amino acids, whey protein, different types of fat burners, and essential fatty acids - to help familiarize you with some that you'll come across.From nutritional products for kids to supplements for adults, many health products contain amino acids. This is because amino acids are compounds that help in the development and function of your hormones, muscles, and nervous system. They play a major role in protein and enzyme synthesis.