🟢 80/100

This product is generally safe

  • Folate: 400mg is 400.0× the Tolerable Upper Intake Level (1.0mg)
  • 50% of ingredients have research evidence
C Label Compliance Grade

Product Label

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Safety Alerts

⚠️ Folate: 400mg is 400.0× the Tolerable Upper Intake Level (1.0mg)

Label Data

1 Veggie Capsule(s) Serving Size
90 Servings
Vitamin Product Type
50% Evidence Coverage

Supplement Facts — Evidence Check

Vitamin C
40 mg (45% DV)
400 mcg DFE (100% DV)
⚠️ Exceeds Tolerable Upper Intake Level by 400.0× (UL: 1.0 mg) 📚 225 studies (Tier A: 10, B: 105)
RDA 0.4mg This product: 400mg UL 1.0mg

Other Ingredients

Microcrystalline Cellulose Modified Cellulose

Label Claims — Verification

Nutrient
All Other
Structure/Function
All Other (99% of products) Structure/Function (77% of products) Nutrient (60% of products) Approved Health (5% of products)

Target Groups

Vegan Vegetarian Adult (18 - 50 Years) Gluten Free

Product Information

📋 Directions for Use

Suggested Adult Use: Take 1 capsule daily preferably between meals, or as recommended by a nutritionally-informed physician.

🧪 Formulation Notes

Doctor’s Best Fully Active Folate 400 with Quatrefolic contains Quatrefolic, the glucosamine salt of (6S)-5-methyltetrahydrofolate, the most bioavailable form of folate, that provides greater stability and water solubility. Our bodies cannot synthesize folate and due to its water-soluble nature, the body stores folate to a limited extent.

Quatrefolic is the metabolically active folate, making it more efficient than folic acid for maximized benefits! Folate is an essential vitamin to support DNA, proper cell division, cardiovascular, mental and emotional well-being. Vitamin C is included for added stability.

Quatrefolic is the most bioavialable form of folate

Non-GMO Gluten free

Vegan

Additional Information

Folic acid, and food folate, needs to be converted to its metabolically active form to be utilized by the body.

Helps support cardiovascular, mental and emotional well-being

YDRB262-3

Helps support healthy mental and emotional well-being

Vegan

Store in a cool dry place.

Product Details

UPC / SKU 7 53950 00262 3
DSLD Entry Date 2019-08-23
Product Type Vitamin
Form Capsule
DSLD ID 203311
Data Updated 2026-04-11

Research Evidence

363 Research Sources
57 Avg Quality Score
187 Meta Analysis
56 Systematic Review
54 Rct
29 Guideline
26 Clinical Trial
6 Cochrane Review
2 Regulatory Source
1 Other
1 Openfda Safety
A Homocysteine-lowering interventions for preventing cardiovascular events
Meta Analysis The Cochrane database of systematic reviews 2017
A Community-based intervention packages for reducing maternal and neonatal morbidity and mortality and improving neonatal outcomes
Meta Analysis The Cochrane database of systematic reviews 2015
A Folate Intake and Risk of Pancreatic Cancer: A Systematic Review and Updated Meta-Analysis of Epidemiological Studies
Meta Analysis Digestive diseases and sciences 2021
A The Association Between the Risk of Hypertensive Disorders of Pregnancy and Folic Acid: A Systematic Review and Meta-Analysis
Meta Analysis Journal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques 2021
A A Comparative Study Evaluating the Effectiveness of Folate-Based B Vitamin Intervention on Cognitive Function of Older Adults under Mandatory Folic Acid Fortification Policy: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Meta Analysis Nutrients 2024
A Associations between serum Homocysteine, vitamin B9, and vitamin B12 levels and the formation of intracranial Aneurysms: A systematic review and meta-analysis
Meta Analysis Journal of clinical neuroscience : official journal of the Neurosurgical Society of Australasia 2025
A Intake of vitamin B6, folate, and vitamin B12 and risk of coronary heart disease: a systematic review and dose-response meta-analysis of prospective cohort studies
Meta Analysis Critical reviews in food science and nutrition 2019
A Beneficial effects of folic acid supplementation on lipid markers in adults: A GRADE-assessed systematic review and dose-response meta-analysis of data from 21,787 participants in 34 randomized controlled trials
Meta Analysis Critical reviews in food science and nutrition 2022
A Folic acid supplementation and blood pressure: a GRADE-assessed systematic review and dose-response meta-analysis of 41,633 participants
Meta Analysis Critical reviews in food science and nutrition 2023
A Digital tracking, provider decision support systems, and targeted client communication via mobile devices to improve primary health care
Meta Analysis The Cochrane database of systematic reviews 2025
View all evidence for Folate →

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