There is a profile on Steroid.com on Deca. Read that first. it explains natural testosteron supression a little and has a graph. Unfortunately I was not able to locate the actual study that the information was pulled from in the references. I spent about 10 minutes looking for the research on
www.ncbi.nlm.nih.gov but couldnt find anything there either. I know it exists though. You're gonna have to keep looking.
You're friend is obviously not an authority. See what happens to him doing that shit. Test is the basis for all cycles unless you're (not you but a person in general) a vag and go with an all oral cycle.
Let me start this over. You've been training for a year right? You haven't been doing it long enough to use roids. You're not going to get a lot of benefit from them and you're gonna end up throwing away your money. Thats great that you've lost 95 lbs. Seriously. Nice work. But now try to ad 20lbs of muscle in the next year. Are you going to the gym 6 days a week? Are you eating 6 times a day and keeping a journal on what you are eating each meal? Keeping a journal on how much weight you lift when? These are all things that you need to be proficient at before you're gonna get any real results from juicin.
My recommendation is that you get to 12% bodyfat and then gain 20lbs of muscle. Have a trainer at your gym check your body fat for you. and then keep track of your progress by way of the methods I mentioned. Read Arnolds Encyclopedia 2 or 3 times though and when you know all of that read A Scientific Approach to Bodybuilding a couple times. In the mean time, stay on this forum and read what people say, esspecially the vets, in another year you'll have gained a lot of skills through reading and working out.
When I first started I got into it because of a dude just like your friends. Uneducated and just got all his info from what his other stupid meat head friends did. You know what he has to show for all his money spent on roids while I was learning and workin my ass off? Nothing, hes still the same size except hes down a few thousand bucks. We still talk but I dont even try to give him advice on roids. He's been scammed twice and stopped mid cycle a couple times because he lacked the knowledge to know why he was having side effects he did. He also lacked the understanding in how to work out and eat on roids. I'm 55lbs heavier than when I started 5 years ago and 30 of that came in the first two years without juicin. Hes just 5 years older and the same size.
Don't listen to those dopes. Do your research. Work hard. Have patience. You'll be glad you did. Sorry, that's not what I wanted to hear either when I started but its still good advice.