According to WebMD itβs inconclusive if creating enhances performance. In some people it decreases performance. Possible side effects are kidney disease, kidney failure, water retention,nausea, diarrhea, muscle pain and high blood pressure. Used with other stimulants can cause cardiovascular failure. Creatinemah affect blood sugar levels. The long term effects are not yet known.
You can get a normal amount of creative from meat, poultry and fish. After a growth spurt freshman year my son was 5β11β 135. Just filling out, FASST (fitness, agility, speed, strength training) and drinking protein shakes got him to 6β 160 the following season. During this period he lived with his face in the fridge. He was always eating.
It was easier to put on weight and fill out after he stopped playing school basketball. Playing soccer and basketball was keeping him too thin.