Folate (as L-Methyltetrahydrofolate Calcium) — 1,000 mcg DFE L-Methyltetrahydrofolate Calcium (L-MTHF) is the calcium salt of the predominant circulating, biologically active form of folate in human plasma — the end-product of the multi-step enzymatic folate activation pathway — delivered here in its final, immediately utilizable form without requiring the MTHFR enzyme conversion step that standard folic acid supplementation depends upon. As the direct methyl donor in the folate cycle, L-MTHF donates its methyl group to homocysteine via methylcobalamin-dependent methionine synthase, producing methionine for S-adenosylmethionine (SAMe) synthesis — the universal methyl donor governing over 200 downstream methylation reactions including neurotransmitter synthesis, DNA methylation, epigenetic gene regulation, and phospholipid metabolism. For the estimated 40–60% of the population carrying MTHFR C677T or A1298C polymorphisms that impair folic acid conversion, L-MTHF is the clinically essential folate form, ensuring adequate methylation cycle function and supporting neural tube development, homocysteine management, and cellular DNA integrity independent of enzymatic conversion capacity.
Vitamin B12 (as Methylcobalamin) — 1,000 mcg Methylcobalamin is the neurologically active, methyl-group-bearing coenzyme form of vitamin B12 — representing approximately 80% of circulating plasma B12 in healthy individuals — and the form that directly participates in the folate-methionine methylation cycle without requiring hepatic conversion from cyanocobalamin or hydroxocobalamin. As the obligate cofactor for methionine synthase, methylcobalamin couples the folate and methionine cycles by accepting the methyl group from L-MTHF and transferring it to homocysteine, completing the homocysteine remethylation reaction that maintains healthy homocysteine levels within normal ranges and sustains SAMe production for ongoing methylation activity throughout the body. Beyond its methylation cycle role, methylcobalamin is essential for myelin sheath synthesis and maintenance in the peripheral and central nervous system, supporting optic nerve integrity, sensory and motor nerve conduction velocity, and cognitive function — establishing it as the preferred B12 form for neurological health protocols and for the estimated 10–15% of adults over 60 with clinically significant B12 insufficiency due to declining intrinsic factor production.
