Hi guys, To be honest i just chose this hormone with this ester because Cypionate is one of the only testosterones that is prescribed by a doctor why you might ask well the FDA and red tape. The best type to be honest that depends for hormone replacement therapy test cypionate or test enanthate would be your best choice because of the long half life. enanthate half life is 4-5 days and cypionate is 8 days. Now for the real subject the best for building muscle at a fast rate would be sustanon 20, test enanthate, or test propionate. the test propionate is a short ester 3 day half life. you need to have your milligram at 750mg or 1000mg a week. ill be doing test propionate subject next. Now on the subject of insulin or blood sugar management the test wont effect that. What would effect those subjects would be HGH (human growth hormone), IGF(insulin growth factor), and also insulin. i would be doing those subjects after the steroids are done. To really answer your question blood sugar and insulin is diet and activity, working out or physical activity.