Yeah, we just told you to pump iron, but you also need to eat it. "If you don't have enough of this mineral, your body can't get enough oxygen to your cells, which slows down your metabolism," explains Samantha Heller, R.D., a nutritionist at the New York University Medical Center. Most multivitamins contain around 18 mg (the RDA for adults); you can also get your fill by eating three to four daily servings of foods rich in iron, such as lean red meat, chicken, fortified cereal, and soy nuts. If you're feeling symptoms like fatigue and weakness, ask your doctor to test you for anemia (it's a simple blood test) at your next physical.
According to most interviews, Hugh regularly drank protein shakes before and after his workouts. Outside of a protein supplement, all of his other nutrients came from natural foods. He most likely took additional supplements not directly tied to gaining size such as a multivitamin and fish oil pill. In fact, a study from the Department of Health Sciences at Getty College has shown that individuals who consume a routine fish oil supplement end up with higher amounts of fat free mass over the course of a few months.