(File photo)Edited and translated by Du Mingming, People's Daily Online1. Beef contains potassium and proteinLow level of potassium will lead to inhibition of protein synthesis and growth hormone production, thereby will affect the growth of muscles. Lean beef is a very good source of protein, providing 22g of protein in just 4 ounces.【1】 【2】 【3】 【4】 【5】 【6】 【7】