Insulin treated patients with diabetes (type 1 or 2), and physicians involved in the treatment, management of diabetes and care of patients with diabetes.
It takes approximately six to eight weeks to grow enough hair for a fade or basic man's haircut after you shave your head. If you wish to grow your hair out longer, it will take an additional month for each 1/2 inch of growth.
Generally speaking, hair regrowth in men is more difficult and takes multiple injections at 6-8 week intervals. It could take 5 or 6 months at least to see appreciable results and sometimes a year. Determining factors are the amount and cause of hair loss, additional treatments for hair and scalp used in combination and the general state of health.