I just recently learned that either Human Growth Hormone (H.G.H.) or Insulin creates IGF-1, and IGF-1 acts like both H.G.H. and Insulin, meaning it contributes to the growth of either body fat (which creates estrogen in men), or body muscle (which creates testosterone in men). I believe that IGF-1, which is created by insulin, is what contributes to M.P.B., and the IGF-1 produced by H.G.H. is what causes the hair to "thicken". Remember that balding men are shown to have higher IGF-1 levels and lower IGFBP-3 levels. It is well known that high blood sugar levels are extremely bad, for many reasons such as: it inhibits H.G.H. release, it is stored as fat, it reduces S.H.B.G. and much more.
Insulin itself is a growth factor, one of the most powerful hormones within our body...and luckily one of the easiest to control. It would seem to me that the ideal way to control insulin and therefore IGF-1 as well, would be thru diet. Dietary protein is known to release H.G.H. that once again stimulates the "muscle building form" of IGF-1 from the liver to build muscle and burn fat. Dietary fat is known to moderately inhibit the release of H.G.H., but one must remember Omega 3 is crucial to hair health. Carbs are known to raise insulin levels but whole grains, or carbs with fiber, very slowly release insulin. Sugar and all high-glycemic carbs such as soda causes a sharp blood sugar spike which makes you pancreas produce copious amount of insulin, which builds up as fat, reduces strength, contributes to arteriosclerosis (a major factor in M.P.B.), and inhibits IGFBP-3 (which was shown to be low in balding men). To increase H.G.H, that is done by extreme endurance exercises, and is actually a natural process. Estrogen levels within the body determine the amount of H.G.H. is released, in other words; estrogen inhibits H.G.H. Testosterone helps trigger the release of H.G.H. and the two work together keeping the male body young, lean, and strong.