Betaine Increases Intraepithelial Lymphs in Duodenum and Increases Functional Properties of Phagocytes
I know this seems like one of those big long technical titles, but the take home message here is that betaine, considered as a strong methyl donor akin to folic acid, may have positive effects on the immune system being able to fight off infections.
Nutrition.org — Abstracts: Klasing et al. 132 (8): 2274