IDNStudy.com, ang komunidad ng pagbabahagi ng kaalaman. Hanapin ang mga solusyong kailangan mo nang mabilis at tiyak sa tulong ng aming mga bihasang miyembro.
Answer:
"PROTEIN"
"one of the most essential macronutrients for muscle growth and repair because it's packed with amino acids that your body does and doesn't produce".
Source:my science book and some research