Methylation and DNA synthesis cofactor
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About Vitamin B9 (Folate)
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About Vitamin B9 (Folate)
Overview and History
Folate belongs to the B‑vitamin family and exists as a group of folate compounds in foods and as the synthetic form folic acid. Biochemically, its active forms (for example, 5‑methyltetrahydrofolate) act as cofactors in one‑carbon metabolism, supporting nucleotide synthesis and methyl group transfers.
Historically linked to studies of blood cell production and growth, folate is especially important when cells divide rapidly. It works closely with other cofactors and enzymes to support DNA production, methylation of biomolecules, and pathways that influence neurotransmitter and amino acid metabolism.
Interpreting Highs and Lows
Low folate levels typically reflect inadequate intake, reduced absorption, increased physiological demand, or limits in biochemical activation; they are associated with reduced capacity for DNA synthesis and methylation, which can affect energy, recovery, and cognitive processes. Genetic variants that alter folate processing (for example, in genes like MTHFR) can also influence measured levels and functional folate activity.
Elevated folate in blood most often reflects recent supplementation or fortified food intake, altered cellular uptake, or changes in metabolism and clearance. Interpretation of high or low values is most informative when considered alongside red blood cell folate, B12 status, homocysteine, and genetic markers within the full Nutrient Zoomer panel.
Featured Test
Folate is included in the Nutrient Zoomer because it is central to one‑carbon metabolism and methylation pathways. The marker evaluates current folate availability and, together with related nutrient and genetic data, helps reveal whether folate biology supports DNA synthesis, methylation, and metabolic balance—informing personalized nutrition strategies.
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Mary Beth Augustine
DCN, RDN, FAND- Lead Clinical Educator
Suzanne Barker
MS, RDN, LD, CTTS, CGP- Clinical Educator
Suzette Garcia
MSc- MHNE- Clinical Educator
Brooke Mader Ganev
MS, CNS, LDN, FDN- Clinical Educator
Adair Anderson
MS, RDN, LDN- Clinical Educator
Lillie Luu Nguyen
DCN, CNS, LDN- Clinical Educator
Jason Barker
ND- Clinical Educator
Emaline Brown
ND- Clinical Educator
Dana Filatova
DCN, CNS, LDN- Clinical Educator
Jessy Dhanjal
ND- Clinical Educator
Nour Amri
MS, LDN, CNS, CKNS- Clinical Educator
