At 30%bf you should be working on nutrition to lower your bf closer to 15% before cycling. You are putting your heart and numerous other organs at great risk cycling at 30%bf and your buddy should certainly be aware of this. If he isn't, he is not qualified to advise you.

Side effects aren't always visible and its the ones you WON'T see that should concern you the most - a heart attack or blood clot rarely gives you any early symptoms of a potentially deadly condition. Elevated blood pressure and poor lipid metabolism are other variables that should be monitored and the lack of an AI me ruined for your cycle is simply asking for major problems.

Unfortunately there are many guys in the gym offering advice that simply shouldn't be instructing others.