Do you want to grow your muscle size and be fuller/built with your gym trainings?
Do you want a boost in strength to be able to do more Reps/Sets at the gym?
If yes,
Then Creatine is what you need.
Creatine is an FDA approved supplement which improves your strength during exercise as well as increases muscle size.
A meta analysis of research papers on Creatine shows that one can can gain 1-3 pounds in weight, 8% boost in strength and 14% increase in the number of Reps/Sets performed in the gym using a specific method of using Creatine