Mason Natural Vitamin B-2, 100 mg supplement bottle
Mason Natural

Vitamin B-2, 100 mg Review

What We Researched
1 active ingredient analyzed · 6 inactive ingredients decoded · 2 brand certifications checked · Page generated: Sep 2026
100
Product Score Excellent
71
Brand Score Fair

Two independent scores — the product and the brand behind it, never blended into one number. See our methodology.

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Riboflavin(Vitamin B2) 100 mg 7,692%
Bioavailability Excellent

Absorption Rating

  • Riboflavin(Vitamin B2) Good
Other Ingredients Excellent

Fillers & Additives

  • Microcrystalline Cellulose
  • Citric Acid
  • Stearic Acid
  • Croscarmellose Sodium
  • Polyvinylpyrrolidone
  • Magnesium Silicate
Efficacy Excellent

Dosage Analysis

  • Riboflavin(Vitamin B2) 100 mg Effective

Supplement Facts

Ingredient Amount % Daily Value
Riboflavin(Vitamin B2) 100 mg 7,692%

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Microcrystalline Cellulose Safe

Adds bulk to small-dose supplements to make tablets/capsules a manageable size.

Citric Acid Safe

Adds tartness and acts as a natural preservative. Also aids in ingredient stability.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Croscarmellose Sodium Safe

Helps tablets break apart and dissolve quickly in the stomach.

Polyvinylpyrrolidone Generally_safe

It is used to bind ingredients together.

Magnesium Silicate Generally_safe

It is used to improve powder flow and prevent clumping.

Brand Trust Report
Mason Natural

Founded 1967 · Miami Lakes, Florida, USA · 255 products · masonvitamins.com

Certifications

2 certifications
Consumerlab Source available Primary evidence
Fda Gmp Inspections Source available Primary evidence

Transparency

2 claims
Third Party Testing Claim — Claimed Evidence available Evidence

Violation History

4 incidents
Recall Herbal Colon Cleanser Capsules2025-09-02 Source available Primary source
Recall Healthy Sense Daily Multiple with Iron and People's Choice Women's Daily Vitamins with Iron2022-11-17 Source available Primary source
Prop 65 Lead2017-03-10 Source available Primary source
Prop 65 Lead2016-03-28 Source available Primary source
Related Supplements
Frequently Asked Questions
Is Mason Natural Vitamin B-2, 100 mg a good supplement?

Mason Natural Vitamin B-2, 100 mg received a product quality score of 100/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients All 6 inactive ingredients (fillers, binders, capsule materials) are rated safe — a clean formulation with no flagged additives. The manufacturer, Mason Natural, holds a brand trust score of 71/100.

What are the ingredients in Mason Natural Vitamin B-2, 100 mg?

Mason Natural Vitamin B-2, 100 mg contains 1 active ingredients: Riboflavin(Vitamin B2) (100 mg). Notable high-dose ingredients include Riboflavin at 7,692% DV. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Mason Natural Vitamin B-2, 100 mg safe to take?

GoodSupp reviewed the inactive-ingredient data available for Mason Natural Vitamin B-2, 100 mg. All 6 inactive ingredients — including capsule materials, fillers, and binders — are currently classified as safe in GoodSupp's ingredient reference data. This label analysis cannot determine whether the product is safe for a particular person, and source labels may change. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Mason Natural a trustworthy supplement brand?

Mason Natural receives a brand trust score of 71/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1967 and headquartered in Miami Lakes, Florida, USA, the company offers 255 products in their lineup. Note: Mason Natural has 4 historical regulatory incidents on record, which are factored into the trust score.

How much vitamin d3 should i take daily?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

What does vitamin d do?

This is an important question for supplement consumers. The dietary supplement industry is largely self-regulated, which means product quality, ingredient transparency, and safety practices vary significantly between brands and products. The most reliable way to evaluate any supplement is to check for third-party testing certifications, review the full ingredient list and dosages, and research the brand's regulatory track record. GoodSupp's database of over 150,000 analyzed products provides independent quality scores, ingredient safety ratings, and brand trust reports to help you make evidence-based decisions.

How much vitamin d3 per day for a woman?

The optimal dosage depends on your individual health needs, age, sex, and current nutrient levels. Recommended daily amounts are established by health authorities but may vary from therapeutic doses used in clinical research. It's important to check the Supplement Facts label for the exact amount per serving and compare it against the % Daily Value. Some supplements provide mega-doses well above the Daily Value, which may not be necessary and in some cases could be harmful — particularly for fat-soluble vitamins (A, D, E, K) that accumulate in the body. GoodSupp's efficacy analysis evaluates whether a product's dosages align with clinically studied amounts. Always consult your healthcare provider for personalized dosage recommendations.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records — read our methodology. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.