IGF-1
Stands for Insulin-like growth factor. An important hormone for muscle growth. Naturally produced by the body in response to exercise and is necessary for normal physiological functioning. Excess of IGF-1 may be associated with an increased risk of breast cancer, and prostate cancer.
Inositol
An active factor in the B-Complex vitamins which help convert food to energy. With Choline, Inositol is active in the metabolism of fats.
Insulin
An anabolic hormone that's supposed to take the sugar and transport it into the muscle. Insulin also promotes increased amino acid entry into muscle and increases muscle protein synthesis. Too much insulin can cause sugar to bypass muscle, and be stored as bod yfat.
Ipriflavone
One of many flavonoids, ipriflavone, formally known as 7-isopropoxyisoflavone, is synthesized from the soy isoflavone daidzein. It has anabolic effects that are especially pronounced in bone.
Iron
Mineral essential to oxygen transport in blood (via hemoglobin and myoglobin), enzyme production and immune support. A deficiency can cause the most common form of anemia. Teenagers need additional iron during their years of maximum growth; women need extra iron during the years they are menstruating and during pregnancy.
Isoflavones
Phytonutrient antioxidants, including genisteine and diadzein, that act as estrogen receptor protectors (minimize PMS, menopause side effects) and lower cholesterol levels.
Isoleucine
One of the three branched chain amino acids. They are called BCAA's because they structurally branch off another chain of atoms instead of forming a line. Studies have shown that BCAA's help to stimulate protein synthesis and inhibit its breakdown, so BCAA's have powerful anabolic and anticatabolic effects on the body.
They may also potentiate the release of some anabolic hormones, such as growth hormone. Regular ingestion of BCAA's help to keep the body in a state of postive nitrogen balance. In this state, your body much more readily builds muscle and burns fat. Studies have shown that athletes taking extra BCAA's have shown a loss of more body fat than those not taking BCAA's.
