SummaryThis review has dealt with the importance of methionine, choline and sulphate in poultry. The interrelationship between methionine and choline and between the sulphur amino acids and inorganic sulphate are also discussed. The review has emphasized that a three way interrelationship between methionine, choline and sulphate exists and should not be overlooked. It is pointed out that a complete understanding of the interrelationships between methionine and inorganic sulphate cannot be attained unless all three of these nutrients are studied simultaneously.