Muscle Supplements Is There Any Other Muscle Supplements I Can Use Besides Steroids That Are Legal And Won't Have Side Effects?

Is there any other muscle supplements I can use besides steroids that are legal and won't have side effects? - muscle supplements

I have worked on intensively.I squats and sit-ups and nothing. Is all that matters is that my shoulders are wider, but it shows the muscles (mirrored). Is there another way I can be bigger muscles without receiving steroids or other supplements, is good?