When browsing online retailers like Amazon or specialized health sites, you will typically find three main options:

: The synthetic form used in fortified foods and standard supplements. It is generally more stable and cost-effective, and it is the only form extensively proven by the CDC to prevent neural tube defects during pregnancy.

: Often labeled as "active folate," this form does not require enzymatic conversion in the liver. It is frequently recommended for individuals with MTHFR genetic variants who may struggle to process other forms.

: A metabolically active form that bypasses certain enzymatic steps but is distinct from methylfolate; it is sometimes preferred by those sensitive to methylated nutrients. Top-Rated Folate Supplements (2026)