Why Should Consumers Exercise Caution When Purchasing Any Product That

Why should consumers exercise caution when purchasing any product that claims to boost muscle mass?

A) Muscle building cannot occur without supplementation of additional protein.
B) Muscle-building products may be contaminated with anabolic steroids.
C) Muscle-building products tend to contain stimulants.
D) Muscle-building products are commonly water based, and therefore the majority of the product ingested is excreted in urine and sweat.