Final answer:
Creatine and anabolic steroids are dietary supplements marketed to strength-trained individuals as precursors to testosterone.
Step-by-step explanation:
Dietary supplements marketed to strength-trained individuals that are precursors or prohormones for testosterone include creatine and anabolic steroids.
Creatine is an organic acid naturally occurring in the body that supplies energy to muscle cells for short bursts of energy. It has been shown to improve strength, energy, muscle mass, and recovery times. Anabolic steroids, on the other hand, are synthetic variations of testosterone that are used to boost muscle mass and increase power output.