Folate is needed for development and growth of cells (including red blood cells) and synthesis of DNA (genetic material)
Last reviewed: May 18, 2026 Last updated: May 18, 2026 Written by: Jay Hastings, CEO of PlexusDx Jay Hastings is the CEO of PlexusDx, a precision health company focused on genetic testing, blood biomarker insights, and personalized wellness recommendations
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Because the body is efficient at excreting excess B12 through urine, there is no established tolerable upper intake level (UL) for the vitamin
B12 circulates and binds to transport proteins that carry it to cells throughout your body, where it participates in energy metabolism, DNA synthesis, and myelin production