Proteins are necessary for tissue repair and for the construction of new tissue. Every cell needs protein to maintain its life. Protein is also the primary substance used to replace worn out or dead cells. Your muscles, hair, nails, skin, and eyes are made of protein.
Taking supplemental chromium has been shown repeatedly to improve insulin sensitivity and glucose tolerance, even to the point of reversing type II diabetes in many people (1). Thus, as my old clinical nutrition professor pointed out, apparently a chromium deficiency can actually lead to type II diabetes.
If insulin sensitivity is decreased, blood sugar levels can rise. This is a sign that someone either has or is at increased risk of having diabetes. Prior to the test the men were given either caffeine tablets equal to 2 to 3 cups of coffee or a placebo. Results showed that caffeine reduced the men's ability to process blood sugar. It also interfered with insulin, the body's hormone that handles blood sugar.