Methylation

Betaine, also known as trimethylglycine (TMG), is one of the most underrated yet scientifically validated supplements for methylation support, liver health, cardiovascular wellness, and athletic performance. Derived primarily from beets (Beta vulgaris, hence the name “betaine”), this naturally occurring compound serves as a critical methyl donor in one of your body’s most fundamental biochemical pathways. Unlike trendy supplements with limited research, betaine has decades of clinical evidence supporting its role in homocysteine metabolism, liver disease prevention, and cellular health optimization. It’s FDA-approved at high doses (6 grams daily) for treating homocystinuria, a genetic condition causing dangerous homocysteine buildup—proof of its safety and efficacy at therapeutic levels.

Betaine supplements have gained significant attention in recent years for their diverse health benefits, but confusion often arises because “betaine” actually refers to two distinct supplement forms with very different uses. Betaine hydrochloride (betaine HCl) supports digestive function by increasing stomach acid, while trimethylglycine (TMG, also called betaine anhydrous) acts as a methyl donor supporting cardiovascular health, athletic performance, and cellular metabolism. Understanding which form of betaine you need—and why—is critical for achieving your health goals. This comprehensive guide examines the science behind both forms of betaine, their unique benefits, proper dosing strategies, and the best supplement products available today.