insulin is the most anabolic compound available to the human body, its actually not a steroid but a protein. it dramatically increases protein synthesis, u can forget tren and hGH, insulin is by far the strongest thing a BB can take!
the problem is that for people who dont need it (ie. they dont have diabetes) it is extremely dangerous, take just a little to much and ur in an insulin induced coma and if no1 is around to help u then ur dead basicly.
insulin on its own makes u store fat like crazy which is why its not a good idea to use a high dose insulin cycle on its own, if u run it with a test u will have AMAZING results! honestly, im a jelous ****er that u have diabetes :P its pretty damn hard to get humalog (the best insulin) without a script. start a log because i would love to see what results u get if u run a cycle in conjunction with insulin.
http://www.steroid.com/Insulin.phtml <- more info.