The prohormones in this category are legal dietary supplements that are available to buy over the counter. They are best defined as steroid precursors; they aren’t technically steroids – but are converted into one by the body upon ingestion. These supplements are designed to enhance the effects of hormones already in the user’s body. There are many different types of these compounds available – some are classed as synthetic and others use natural ingredients. Prohormones are designed to help users build lean muscle mass, increase strength, and cut fat. Many companies say that nobody below the age of 18 may use their prohormone products.