Everything DoseRank tracks on the vitamin b9 (folate - folic acid) shelf — Folic Acid. The category itself is never ranked: 190 products get scored the moment you say what you want them to do.
How to read the scores
This legend covers the scores on this page — for data sources, scoring weights, and limits, read the full methodology →
Answer a few questions about your goals, habits, stack, and budget. Then, DoseRank will find the products that best match your needs based on your answers. It's free and only takes 60 seconds! No account is required.
A saved, shareable breakdown: your matched products, dose math, interaction flags to discuss with a clinician, and a price-tracked stack you can revisit.
Questions
Each product gets a composite score blending clinical strength, evidence, dose fit, trust and value — computed for the goal you picked, across this category's products. The #1 on the DoseRank tab has the highest composite; the other tabs re-rank the same products by Value, Trust, or Popularity. Placement is never paid.
Start with a goal, not a brand
Browsing vitamin b9 (folate - folic acid) supplements without a goal makes no sense — different products do different jobs, and “best” flips depending on which job you're hiring for. These are the 45 health outcomes that matter for this category. Pick yours, and the full evidence-ranked shelf loads for that goal alone.
Congenital anomalyStructural or functional birth defect.154 rankedStrong
Folate statusBiochemical sufficiency of folate.154 rankedStrong
HomocysteineAmino acid marker linked with vascular and methylation status.157 rankedStrong
Anemia statusPresence of clinically meaningful low red cell mass or hemoglobin.143 rankedStrong
Cognitive functionOverall thinking ability including memory, attention, and processing.153 rankedStrong
StrokeCerebrovascular event causing neurologic injury.73 rankedStrong
Mean corpuscular volumeAverage red blood cell size.33 rankedStrong
Gastrointestinal adverse eventUndesired digestive side effect such as nausea, diarrhea, or pain.35 rankedStrong
Vitamin B12 statusBiochemical sufficiency of cobalamin.43 rankedStrong
Depressive symptomsLow mood, anhedonia, and related depressive features.112 rankedStrong
Neuropathy symptomsPain, numbness, or dysfunction due to peripheral nerve problems.46 rankedStrong
Endothelial functionAbility of blood vessels to dilate and respond normally.88 rankedModerate-strong
Drug-supplement interactionClinically relevant interaction between a supplement and a medication.4 rankedStrong
Blood pressureArterial pressure; direction of benefit depends on baseline status.94 rankedStrong
Vitamin B6 statusBiochemical sufficiency of pyridoxine-related compounds.22 rankedStrongNothing is ranked yet — the shelf stays locked until you pick a goal.
No goal, no ranking.
A “best vitamin b9 (folate - folic acid) supplement” list without a goal would be marketing, not evidence. Pick what you want to improve and DoseRank scores all 190 products against that goal's trials.