An alternative methylation pathway where dietary choline provides methyl groups to reduce homocysteine.
The process by which choline acts as a methyl donor via its conversion to betaine, participating in the reduction of homocysteine and feeding the cellular methylation cycle.
Choline, an essential or semi-essential nutrient depending on conditions, is converted to betaine by hepatic enzymes. Betaine then acts as a methyl donor to transform homocysteine into methionine via the enzyme betaine-homocysteine methyltransferase (BHMT). This reaction creates an alternative and complementary pathway to the folate-B12 cycle to regulate homocysteine levels and feed the cellular methylation cycle. Adequate choline intake reduces dependence on folate and B12 to maintain homocysteine homeostasis. Choline deficiency alters phosphatidylcholine synthesis and reduces SAM production, affecting hepatic and neural function.
Alternative methyl donor via betaine, reducing homocysteine, and supporting the cellular methylation cycle.
Adult women should consume approximately 425 mg of choline per day, men 550 mg. Food sources include eggs (one egg contains 147 mg), fatty fish, and cruciferous vegetables. Adequate choline intake is particularly important during pregnancy (450-550 mg) for fetal neurologic development and epigenetic regulation.
Choline provides an alternative cellular methylation pathway, reducing dependence on folate-B12, and supporting hepatic and neurologic health.
A question about Choline Methylation? Ask our nutrition AI.
Ask a question