Note: I am a slow gainer and I haven't finished my first bottle yet. With that said, since using this product, I have continued to make strength gains with respect to one-rep max, reps, etc., notwithstanding that my training and nutrition during this time hasn't been at its peak. Additionally, following especially tough workout days which usually leave me needing to take a full rest or very light recovery day, I've found myself feelin great the next day and able to train at a much higher level. My verdict is that these are excellent for recovery, and my progress so far suggests I'll continue to see notable improvements in strength and muscle mass as well. I think they taste pretty good! I'm impressed enough that I already bought my second bottle.