Sore After Working Out

Currently I’m on the 4th month of the advanced muscle gain program. Lately I’ve noticed that I’ve been more sore than normal after working out. I use creatine and a preworkout supplement but that’s all. Any suggestions for a supplement that will help me stay lean and keep me from being so sore after working out?

First so sorry for the long delay. I got really backed up. Awesome. Well change usually will result in soreness. However I would watch these videos.