Betaine is a methyl donor group so can spare methionine and choline.As an osmolyte it can control the amount of water in body fluids (e.g. blood). Poor control can lead to the osmotic damage of body cells. Deficiency symptoms are unlikely but the use of betaine can spare the use of expensive amino acid methionine in the diet resulting in cost saving of the feed. Agritech offer Nutra +.