Nature's Bounty Nature's Bounty Time Release B-100 Ultra B-Complex supplement bottle
Nature's Bounty

Nature's Bounty Time Release B-100 Ultra B-Complex

What We Researched
10 active ingredients analyzed · 8 inactive ingredients decoded · 6 brand certifications checked · 1 retailer compared · Last updated: Mar 2026
74
Product Score Fair
86
Brand Score Good

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Vitamin B1 (Thiamine Mononitrate) 100mg
Vitamin B2 (Riboflavin) 100mg
Niacinamide 100mg
Vitamin B6 (Pyridoxine Hydrochloride) 100mg
Folate (Folic Acid) 400mcg
Vitamin B12 (Cyanocobalamin) 100mcg
Biotin 100mcg
Pantothenic Acid (Calcium d-pantothenate) 100mg
Inositol 100mg
Choline (Choline Bitartrate) 41mg
Bioavailability Good

Absorption Rating

  • Vitamin B1 (Thiamine Mononitrate) Fair
  • Vitamin B2 (Riboflavin) Good
  • Niacinamide Good
  • Vitamin B6 (Pyridoxine Hydrochloride) Fair
  • Folate (Folic Acid) Fair
  • Vitamin B12 (Cyanocobalamin) Fair
  • Biotin Good
  • Pantothenic Acid (Calcium d-pantothenate) Good
  • Inositol Good
  • Choline (Choline Bitartrate) Poor
Other Ingredients Good

Fillers & Additives

  • Hypromellose
  • Magnesium Stearate
  • Microcrystalline Cellulose
  • Silicon Dioxide
  • Stearic Acid
  • Talc High
  • Triacetin
  • Water
Efficacy Very Good

Dosage Analysis

  • Vitamin B1 (Thiamine Mononitrate) 100mg Effective
  • Vitamin B2 (Riboflavin) 100mg Effective
  • Niacinamide 100mg High
  • Vitamin B6 (Pyridoxine Hydrochloride) 100mg Effective
  • Folate (Folic Acid) 400mcg Effective
  • Vitamin B12 (Cyanocobalamin) 100mcg Effective
  • Biotin 100mcg Effective
  • Pantothenic Acid (Calcium d-pantothenate) 100mg Effective
  • Inositol 100mg Under-dosed
  • Choline (Choline Bitartrate) 41mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Vitamin B1 (Thiamine Mononitrate) 100mg
Vitamin B2 (Riboflavin) 100mg
Niacinamide 100mg
Vitamin B6 (Pyridoxine Hydrochloride) 100mg
Folate (Folic Acid) 400mcg
Vitamin B12 (Cyanocobalamin) 100mcg
Biotin 100mcg
Pantothenic Acid (Calcium d-pantothenate) 100mg
Inositol 100mg
Choline (Choline Bitartrate) 41mg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Hypromellose Safe

Forms vegetarian capsule shells. Dissolves easily in the stomach.

Magnesium Stearate Safe

Prevents ingredients from sticking to manufacturing equipment during tableting.

Microcrystalline Cellulose Safe

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

Silicon Dioxide Safe

Prevents clumping and ensures consistent dosing.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Talc Avoid

It is used to improve powder flow and prevent clumping.

Triacetin Generally_safe

It is used as a solvent or humectant.

Water Safe

Dissolves and carries water-soluble ingredients.

Price Comparison

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Nature's Bounty

Founded 1971 · Ronkonkoma, New York, USA · 156 products · naturesbounty.com

Certifications

6 certifications
Clean Label Project Verified Source
Consumerlab Verified
Health Canada Licensed Verified Source
Labdoor Verified Source
Usda Organic Verified Source
Fda Gmp Inspections Verified Source

Transparency

3 claims
Third Party Testing Claim — Verified Source
In House Testing — Verified Source

Violation History

1 incident
Recall Nature's Bounty Kids Multivitamin Gummies2023-06-02Source
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Frequently Asked Questions
Is Nature's Bounty Nature's Bounty Time Release B-100 Ultra B-Complex a good supplement?

Nature's Bounty Nature's Bounty Time Release B-100 Ultra B-Complex received a product quality score of 74/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 10 active ingredients Of the 8 inactive ingredients, 6 are rated safe and 0 are flagged for review. The manufacturer, Nature's Bounty, holds a brand trust score of 86/100 with 6 verified certifications including Clean Label Project, Consumerlab, Health Canada Licensed, Labdoor.

What are the ingredients in Nature's Bounty Nature's Bounty Time Release B-100 Ultra B-Complex?

Nature's Bounty Nature's Bounty Time Release B-100 Ultra B-Complex contains 10 active ingredients: Vitamin B1 (Thiamine Mononitrate) (100mg), Vitamin B2 (Riboflavin) (100mg), Niacinamide (100mg), Vitamin B6 (Pyridoxine Hydrochloride) (100mg), Folate (Folic Acid) (400mcg), Vitamin B12 (Cyanocobalamin) (100mcg), and 4 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Nature's Bounty Nature's Bounty Time Release B-100 Ultra B-Complex safe to take?

Nature's Bounty Nature's Bounty Time Release B-100 Ultra B-Complex has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Nature's Bounty a trustworthy supplement brand?

Nature's Bounty receives a brand trust score of 86/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1971 and headquartered in Ronkonkoma, New York, USA, the company offers 156 products in their lineup. They hold 6 verified certifications including Clean Label Project, Consumerlab, Health Canada Licensed, Labdoor. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Nature's Bounty has 1 historical regulatory incident 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 250,000 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. 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.