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.
Recurrent pregnancy loss (RPL)—defined as two or more consecutive miscarriages—affects 1-5% of couples and represents one of the most emotionally devastating experiences in reproductive medicine. While approximately 50-70% of first-trimester miscarriages result from random chromosomal abnormalities (aneuploidy) that cannot be prevented, the remaining 30-50% have identifiable, modifiable causes: clotting disorders, hormonal deficiencies, autoimmune conditions, uterine abnormalities, metabolic dysfunction, and nutrient deficiencies.
The biology is clear: methylation defects from MTHFR mutations impair DNA synthesis and increase chromosomal errors; vitamin D deficiency doubles miscarriage risk through immune dysregulation; inadequate progesterone fails to support early pregnancy; elevated homocysteine increases clotting and placental insufficiency; oxidative stress in aging eggs accelerates aneuploidy; chronic inflammation disrupts implantation and placental development.
A comprehensive, research-backed breakdown of prenatal vitamin ingredients, optimal forms, dosing by trimester, MTHFR considerations, and the best prenatal supplement picks for 2026.