Betaine (trimethylglycine) is an extremely versatile molecule with many food applications based on its activity as a methyl donor and an osmotic pressure regulating agent. Anhydrous betaine is also used in dietary supplements, pharmaceuticals, dental products, cosmetics and for the fermentation process.Betaine is also used in commercial animal feeds. Because betaine is generally regarded as a metabolic intermediate product present in living organisms, it's safe, biodegradable and not harmful to the environment.