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Fully Active B Complex

product on market Capsule Doctor's Best Safety: 92/100
92/100

This product looks safe

  • Niacin: 50mg is 1.4× the Tolerable Upper Intake Level (35mg)
  • Folate: 400mg is 400.0× the Tolerable Upper Intake Level (1.0mg)
  • 78% of ingredients have research evidence
D Label Compliance Grade

What the Evidence Says

AI-generated · Qwen 3.6 · methodology

This formula contains B vitamins and vitamin C, which are supported by strong evidence for supporting energy metabolism and cellular function. These nutrients act as essential cofactors in various biochemical reactions throughout the body. The overall profile maintains a high safety score, though evidence coverage for the specific blend is limited.

AI-generated summary based on research evidence. Not medical advice.

Alerts

Safety Alerts

Niacin: 50mg is 1.4× the Tolerable Upper Intake Level (35mg)

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

Label

Product Label

Label for Fully Active B Complex
Open Full PDF View on NIH DSLD →
Details

Label Data

1 Veggie Capsule(s)
Serving Size
30
Servings
Vitamin
Product Type
78%
Evidence Coverage
Ingredients

Supplement Facts — Evidence Check

Vitamin C
40 mg (44% DV)
60 mg (5000% DV)
50.0× RDA — above typical dose 76 studies (A:0, B:33)
75 mg (5769% DV)
57.7× RDA — above typical dose 13 studies (A:0, B:1)
50 mg (313% DV)
Exceeds UL by 1.4× (UL: 35 mg) 196 studies (A:5, B:63)
50 mg (2941% DV)
38.5× RDA — above typical dose (UL: 100 mg) 114 studies (A:3, B:35)
400 mcg DFE (100% DV)
Exceeds UL by 400.0× (UL: 1.0 mg) 226 studies (A:10, B:105)
1000 mcg (41667% DV)
416.7× RDA — above typical dose 139 studies (A:1, B:44)
600 mcg (2000% DV)
20.0× RDA — above typical dose 27 studies (A:0, B:11)
100 mg (2000% DV)
20.0× RDA — above typical dose 2 studies — no high-quality reviews

Other Ingredients

Hypromellose Microcrystalline Cellulose Magnesium Stearate Silicon Dioxide
Claims

Label Claims — Verification

Unverified Nutrient
Unverified All Other
Unverified Structure/Function
Info

Product Information

Directions for Use

Suggested Adult Use: Take 1 capsule daily with food, or as recommended by a nutritionally informed physician.

Warnings & Precautions

Warning: Do not exceed recommended dose. Consult a physician if hypersensitive to thiamin (vitamin B1), niacin, and vitamin B12. Discontinue use and consult a physician if adverse reaction occurs.

Keep out of reach of children.

Formulation Notes

Doctor’s Best Fully Active B Complex contains all eight important B Vitamins, a full spectrum designed for optimal absorption and utilization to support overall health and well-being. Water-soluble B vitamins play important roles in cell metabolism, supporting DNA, organs, genes, cells, tissues, skin health, immune system, enzyme functions and energy production. Quatrefolic is the glucosamine salt of (6S)-5-methyltetrahydofolate, the most bioavailable form of folate, that provides greater stability and water solubility. Folate is an essential vitamin to support DNA, proper cell division, cardiovascular, mental and emotional well-being. Full spectrum B vitamins help support health and well-being

Helps support energy production Helps support body metabolism and new cells Helps support DNA, the body's genetic blueprint

Non-GMO Gluten Free Soy Free

With Quatrefolic

Helps support energy production and cell metabolism

Vegan

Additional Information

Store in a cool dry place.

Metadata

Product Details

UPC / SKU7 53950 00299 9
DSLD Entry Date2022-07-21
Product TypeVitamin
FormCapsule
DSLD ID269680
Data Updated2026-04-11
Research

Research Evidence

371
Research Sources
54
Avg Quality
148
Meta Analysis
82
Systematic Review
71
Rct
62
Clinical Trial
2
Regulatory Source
1
Cochrane Review
1
Narrative Review
1
Other
1
Openfda Safety
A Vitamin C supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin C supplementation for the primary prevention of cardiovascular disease
Systematic Review The Cochrane database of systematic reviews 2017 PubMed DOI
A Vitamin C for preventing and treating the common cold
Meta Analysis The Cochrane database of systematic reviews 2013 PubMed DOI
A Vitamin C for preventing and treating pneumonia
Meta Analysis The Cochrane database of systematic reviews 2013 PubMed DOI
A Vitamin E supplementation in pregnancy
Meta Analysis The Cochrane database of systematic reviews 2015 PubMed DOI
A Vitamin C supplementation for prevention and treatment of pneumonia
Meta Analysis The Cochrane database of systematic reviews 2020 PubMed DOI
A Vitamin C supplementation for prevention and treatment of pneumonia
Systematic Review The Cochrane database of systematic reviews 2021 PubMed DOI
A Nutritional interventions for preventing and treating pressure ulcers
Meta Analysis The Cochrane database of systematic reviews 2024 PubMed DOI
A Does Vitamin C Supplementation Provide a Protective Effect in Periodontal Health? A Systematic Review and Meta-Analysis
Meta Analysis International journal of molecular sciences 2024 PubMed DOI
A Circulating vitamin C concentration and risk of cancers: a Mendelian randomization study
Meta Analysis BMC medicine 2021 PubMed DOI
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This product page is for informational purposes only and does not constitute medical advice. Always consult your healthcare provider before taking any supplement.