Folic Acid Info
Standards

Our Sources

Every public health agency, guideline, and study cited across Folic Acid Info, with links to the originals.

We cite primary sources so you can check every claim. These are the sources referenced across the site. Each article also lists the specific sources it uses at the end of the page.

  1. NIH Office of Dietary Supplements. Folate - Health Professional Fact Sheet
  2. Centers for Disease Control and Prevention (CDC). About Folic Acid
  3. U.S. Preventive Services Task Force (USPSTF). Folic Acid Supplementation to Prevent Neural Tube Defects: Recommendation
  4. MedlinePlus, U.S. National Library of Medicine. Leucovorin Injection: Drug Information
  5. MedlinePlus, U.S. National Library of Medicine. Leucovorin: Drug Information
  6. National Heart, Lung, and Blood Institute (NHLBI). Anemia in Brief
  7. Centers for Disease Control and Prevention (CDC). Folic Acid: Sources and Recommended Intake
  8. U.S. Preventive Services Task Force (USPSTF). Folic Acid Supplementation to Prevent Neural Tube Defects: Final Recommendation Statement
  9. American College of Obstetricians and Gynecologists (ACOG). Healthy Eating During Pregnancy
  10. American College of Obstetricians and Gynecologists (ACOG). Healthy Eating
  11. NHS (UK National Health Service). Common questions about folic acid
  12. Centers for Disease Control and Prevention (CDC). Folic Acid: Facts for Clinicians
  13. World Health Organization (WHO). Antenatal iron supplementation
  14. World Health Organization (WHO). Implementing Malaria in Pregnancy Programs in the Context of WHO Recommendations
  15. American College of Obstetricians and Gynecologists (ACOG). Prepregnancy Counseling
  16. U.S. Food and Drug Administration (FDA). Fortifying Corn Masa Flour Products with Folic Acid
  17. Centers for Disease Control and Prevention (CDC). Updated Estimates of Neural Tube Defects Prevented by Mandatory Folic Acid Fortification (MMWR)
  18. Centers for Disease Control and Prevention (CDC). MMWR News Synopsis for January 15, 2015
  19. U.S. Food and Drug Administration (FDA). Questions and Answers Regarding Fortification Policy
  20. NHS Specialist Pharmacy Service. Using folic acid with methotrexate in rheumatoid arthritis
  21. NHS (UK National Health Service). About folic acid
  22. Centers for Disease Control and Prevention (CDC). MTHFR Gene Variant and Folic Acid Facts
  23. Centers for Disease Control and Prevention (CDC). Folic Acid Safety, Interactions, and Health Outcomes
  24. PubMed Central, NIH. Excess Folic Acid and Vitamin B12 Deficiency (Miller, 2024)
  25. PubMed Central, NIH. Diagnosis and Treatment of Macrocytic Anemias in Adults (Nagao, 2017)
  26. NCBI Bookshelf, NIH. Folate Testing: Main Study Findings and Authors' Conclusions
  27. PubMed, NIH. Guidelines for the Diagnosis and Treatment of Cobalamin and Folate Disorders (Devalia, 2014)
  28. NHS (UK National Health Service). Folic Acid: Medicine Information
  29. MedlinePlus, U.S. National Library of Medicine. Methotrexate: Drug Information
  30. NHS (UK National Health Service). Taking Methotrexate with Other Medicines and Herbal Supplements
  31. NHS Specialist Pharmacy Service. Managing interactions with methotrexate
  32. MedlinePlus Magazine, NIH. Did You Know? Supplements and Medications Can Interact in Unexpected Ways
  33. U.S. Department of Agriculture (USDA). FoodData Central
  34. Nature Made. Prenatal Multi Folic Acid + DHA Softgels (product page and Supplement Facts)
  35. Nature Made. Prenatal Multi Tablets (product page and Supplement Facts)
  36. Nature Made. Prenatal Multi Folic Acid + DHA + Choline Gummies (product page and Supplement Facts)
  37. Bayer (One A Day). One A Day Women's Prenatal 1: Supplement Facts (PDF linked from the product page)
  38. Bayer (One A Day). One A Day Women's Prenatal Gummies with DHA: Supplement Facts (PDF linked from the product page)
  39. Bayer (One A Day). One A Day Prenatal Multi Gummy (product page)
  40. Nature's Bounty. Essential Prenatal Gummies (product page and Supplement Facts)
  41. Thorne. Basic Prenatal (product page and Supplement Facts)
  42. Ritual. Essential Prenatal Multivitamin (product page and Supplement Facts)
  43. Needed. Prenatal Multivitamin (product page and Supplement Facts)
  44. FullWell. Women's Prenatal Multivitamin (product page and Supplement Facts)
  45. Perelel. 1st Trimester Prenatal Pack (product page and Supplement Facts)
  46. Cochrane. Vitamins and minerals for subfertility in women (Cochrane review summary, Showell et al. 2020)
  47. Cochrane. Inositol for subfertile women with polycystic ovary syndrome (Cochrane review, Showell et al. 2018)
  48. Cochrane. Antioxidants for male subfertility (Cochrane review summary, evidence current to February 2021)
  49. Centers for Disease Control and Prevention (CDC). Planning for Pregnancy
  50. U.S. Food and Drug Administration (FDA). FDA 101: Dietary Supplements
  51. NIH Office of Dietary Supplements. Iodine: Fact Sheet for Consumers
  52. Beli. Beli home page (products, pricing, quality statements)
  53. Beli. The Science of Men's Prenatal and Women's Prenatal Vitamins
  54. Beli. Beli Vitality for Men (product page)
  55. Beli. Prenatal for Women (product page)
  56. MedlinePlus, U.S. National Library of Medicine. MTHFR Gene Test
  57. MedlinePlus Genetics, U.S. National Library of Medicine. What is direct-to-consumer genetic testing?
  58. MedlinePlus Genetics, U.S. National Library of Medicine. What are the pros and cons of direct-to-consumer genetic testing?
  59. Genate (SNP Therapeutics). The Genate Test (product page)
  60. Genate (SNP Therapeutics). About Us: Genate and SNP Therapeutics
  61. Genate (SNP Therapeutics). Genate Privacy Policy
  62. 23andMe. Are Homocysteine Levels Genetic? (Homocysteine, MTHFR-Related report)
  63. 23andMe. 23andMe+ Premium membership
  64. 23andMe. Privacy and Data Protection
  65. Ulta Lab Tests. Methylenetetrahydrofolate Reductase DNA Mutation Analysis
  66. Walk-In Lab. MTHFR Genotyping, Blood: SpectraCell Test Kit
  67. Any Lab Test Now. MTHFR Test
  68. Quest Diagnostics (questhealth.com). Vitamin B12 and Folate Test
  69. Quest Diagnostics (questhealth.com). Folate (Vitamin B9) Test
  70. Labcorp OnDemand. Vitamin B12 and Folate Test
  71. Ulta Lab Tests. Vitamin B12 and Folate Panel Test
  72. Ulta Lab Tests. Folate RBC Test
  73. Everlywell. Folate (Everywhere lab test)
  74. Everlywell. Vitamin B12 (Everywhere lab test)
  75. LetsGetChecked. Home Vitamin Deficiency Test (Essential Vitamin Test)
  76. American College of Obstetricians and Gynecologists (ACOG). Umbilical Cord Blood Banking. Committee Opinion No. 771 (reaffirmed 2026)
  77. American Academy of Pediatrics (AAP), Pediatrics. Cord Blood Banking for Potential Future Transplantation (policy statement, reaffirmed April 2026)
  78. Health Resources and Services Administration (HRSA). Options for Umbilical Cord Blood Banking and Donation
  79. Cryo-Cell International. How Much Does Cord Blood Banking Cost?
  80. ViaCord (Revvity). Newborn Cord Blood Banking
  81. Securicord. Securicord home page
  82. Securicord. Securicord plans and enrollment
  83. Cord Blood Registry (CBR). Cord Blood Banking Pricing and Enrollment
  84. MedlinePlus (U.S. National Library of Medicine). Ovulation home test
  85. U.S. Food and Drug Administration. Ovulation (Urine Test)
  86. MedlinePlus (U.S. National Library of Medicine). Progesterone Test
  87. American College of Obstetricians and Gynecologists. Evaluating Infertility (FAQ136)
  88. Scientific Reports via PubMed Central. Confirmation of ovulation from urinary progesterone analysis: assessment of two automated assay platforms (Gifford et al., Scientific Reports, 2018)
  89. U.S. Food and Drug Administration. Are There "FDA Registered" or "FDA Certified" Medical Devices? How Do I Know What Is FDA Approved?
  90. Mira (Quanovate Tech Inc.). Mira Hormone Monitor: Max Kit (product page)
  91. Mira (Quanovate Tech Inc.). 20 Mira Fertility Max Wands (product page)
  92. Mira (Quanovate Tech Inc.). Mira Hormone Monitor: Ultra4 Kit (product page)
  93. Mira (Quanovate Tech Inc.). Mira General Privacy Policy (last updated June 15, 2026)
  94. Oova. Oova Hormone Monitoring Kits (home page and FAQ)
  95. Oova. Oova Hormone Kit for Fertility (shop page)
  96. Oova. How It Works (Oova technology)
  97. Inito. Inito Fertility Monitor (home page)
  98. Inito. Buy Inito Fertility Monitor
  99. Proov. Proov Complete Fertility Tracker (product page)
  100. Clearblue. Clearblue Advanced Digital Ovulation Test
  101. Premom (Easy Healthcare). Easy@Home Ovulation Test Strips
  102. Natural Cycles. NC Plan Pregnancy
  103. Everlywell. The Science: CLIA-certified labs and clinical review
  104. Everlywell. All At-Home Tests & Health Kits
  105. Everlywell. Everlywell 360
  106. Everlywell. Thyroid Test Kit
  107. Everlywell. The Everlywell Story: From Shark Tank to Now
  108. Everlywell. Folate (Everlywell Everywhere)
  109. Everlywell. Vitamin B12 (Everlywell Everywhere)
  110. LetsGetChecked. Vitamin Testing, lab results from home
  111. LetsGetChecked. About Us
  112. LetsGetChecked. Home wellness test kits
  113. myLAB Box. myLAB Box home page and FAQ
  114. myLAB Box. At Home Vitamin D Test
  115. myLAB Box. Wellness At Home Tests
  116. myLAB Box. About Us
  117. Ulta Lab Tests. Vitamin B12 and Folate Panel Test
  118. Ulta Lab Tests. FAQ
  119. Ulta Lab Tests. Direct-Access Lab Testing: How It Works and What to Expect
  120. Ulta Lab Tests. General Health Panels promotion page
  121. Ulta Lab Tests. Quick Order (test price list)
  122. Ulta Lab Tests. Comprehensive Wellness Profile (CWP) + Vit D
  123. Ulta Lab Tests. Ulta Lab Tests home page
  124. Quest Diagnostics (questhealth.com). Vitamin B12 & Folate Test
  125. Quest Diagnostics (questhealth.com). Shop All Tests
  126. Labcorp OnDemand. Vitamin B12 and Folate Test
  127. Labcorp OnDemand. Vitamin Deficiency Test
  128. Labcorp OnDemand. Explore Our Lab Tests
  129. Labcorp OnDemand. It's easier than ever to purchase your own health tests
  130. Sesame. Sesame Plus Membership
  131. Sesame. Can You Get a Complete Blood Count Lab Test Online?
  132. HealthLabs.com. Vitamin B12 & Folic Acid Test
  133. Personalabs. Vitamin B12 and Folates Blood Test
  134. MedlinePlus, U.S. National Library of Medicine. Health screenings for women ages 18 to 39
  135. MedlinePlus, U.S. National Library of Medicine. Health screenings for men ages 18 to 39
  136. MedlinePlus, U.S. National Library of Medicine. Vitamin D Test
  137. Centers for Medicare & Medicaid Services (CMS). Clinical Laboratory Improvement Amendments (CLIA)
  138. U.S. Food and Drug Administration (FDA). Clinical Laboratory Improvement Amendments (CLIA)
  139. Centers for Disease Control and Prevention (CDC). Clinical Laboratory Improvement Amendments: About
  140. Function Health. Function Health: Check your health (homepage)
  141. Function Health. What Function Health tests
  142. Function Health. Function Health FAQs
  143. Function Health. Nutrients biomarkers
  144. Function Health. Function Health pricing
  145. Superpower. Superpower: Your new health membership (homepage)
  146. Superpower. Superpower Membership FAQs
  147. Superpower. What we test (biomarker library)
  148. SiPhox Health. SiPhox Health: At-Home Blood Testing + Personalized Action Plan (homepage)
  149. SiPhox Health. SiPhox Health Membership: Explore Included Panels
  150. SiPhox Health. Ultimate 360 Health Panel
  151. SiPhox Health. Longevity Essentials Panel
  152. InsideTracker. Blood tests and membership options (store)
  153. InsideTracker. Membership + Ultimate test
  154. MedlinePlus, National Library of Medicine. How to Understand Your Lab Results
  155. Cochrane. General health checks in adults for reducing morbidity and mortality from disease (Krogsboll, Jorgensen, Gotzsche; Cochrane Database of Systematic Reviews 2019, CD009009)