Vitamins and amino acids are involved in cellular metabolism and protein production, so they are used to improve the food conversion coefficient and increase the growth rate and quality of meat and eggs. Plant protein, which constitutes a high percentage of poultry diet protein, is unbalanced in essential amino acids, so the use of amino acids is essential separately. The use of oral amino and Whitenian solution – Amin & Vit Rooyan in the face of various stresses, recovery, heat, anorexia, and after the use of antibiotics are recommended.