Jamieson B12 1,200 mcg Timed Release supplement bottle
Jamieson

B12 1,200 mcg Timed Release Review

What We Researched
1 active ingredient analyzed · 6 inactive ingredients decoded · 5 brand certifications checked · Last updated: Aug 2026
93
Product Score Excellent
100
Brand Score Excellent

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
Vitamin B12 (Methylcobalamin) 1,200 mcg —
Bioavailability Excellent

Absorption Rating

  • Vitamin B12 (Methylcobalamin) Good
Other Ingredients Excellent

Fillers & Additives

  • Cellulose
  • Dicalcium Phosphate
  • Water soluble cellulose
  • Vegetable Magnesium Stearate
  • Hydroxypropyl Cellulose
  • Silica
Efficacy Very Good

Dosage Analysis

  • Vitamin B12 (Methylcobalamin) 1,200 mcg High

Supplement Facts

Ingredient Amount % Daily Value
Vitamin B12 (Methylcobalamin) 1,200 mcg

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Cellulose Safe

Provides bulk and structure in tablets and capsules.

Dicalcium Phosphate Safe

Serves as both a filler and a supplemental source of calcium and phosphorus.

Water soluble cellulose Unknown
Vegetable Magnesium Stearate Safe

Prevents ingredients from sticking to equipment. Derived from vegetable sources.

Hydroxypropyl Cellulose Safe

Binds tablet ingredients and can form tablet coatings.

Silica Safe

Prevents ingredients from clumping and improves powder flow.

Brand Trust Report
Jamieson

Founded 1922 · Toronto, Ontario, Canada · 384 products · jamiesonvitamins.com

Certifications

5 certifications
Consumerlab Verified Source
Health Canada Licensed Verified Source
Nsf Gmp Verified Source
Fda Gmp Inspections Verified Source
Informed Sport Verified Source

Transparency

4 claims
Third Party Testing Claim — Verified Source
In House Testing — Verified Source
Testing Lab Disclosure — Claimed Source

Violation History

8 incidents
Prop 65 Lead2019-02-14Source
Prop 65 Lead2019-02-14Source
Lawsuit Products labeled as containing glucosamine sulfate did not actually contain any.2019Source
Lawsuit Manufacturing and selling products labeled as containing glucosamine sulfate which allegedly did not contain any glucosamine sulfate.2019Source
Recall Jamieson Vitamin B2 100 mg (NPN 00309702, Lots 1278153, 1387669, 1390088)2009-03-02Source
Recall Vitamin B22009-03-02Source
Recall Jamieson's MegaCal 650 mg with Vitamin D, 100 count (Lot 302273)2002-02-11Source
Recall MegaCal 650 mg with Vitamin D2002-02-11Source
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Frequently Asked Questions
Is Jamieson B12 1,200 mcg Timed Release a good supplement?

Jamieson B12 1,200 mcg Timed Release received a product quality score of 93/100 in GoodSupp's independent analysis, placing it in the top tier of supplements we've analyzed. The product contains 1 active ingredients with 225 servings per container. Of the 6 inactive ingredients, 5 are rated safe and 0 are flagged for review. The manufacturer, Jamieson, holds a brand trust score of 100/100 with 5 verified certifications including Consumerlab, Health Canada Licensed, Nsf Gmp, Fda Gmp Inspections.

What are the ingredients in Jamieson B12 1,200 mcg Timed Release?

Jamieson B12 1,200 mcg Timed Release contains 1 active ingredients: Vitamin B12 (Methylcobalamin) (1,200 mcg). Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Jamieson B12 1,200 mcg Timed Release safe to take?

Jamieson B12 1,200 mcg Timed Release 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 Jamieson a trustworthy supplement brand?

Jamieson receives a brand trust score of 100/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1922 and headquartered in Toronto, Ontario, Canada, the company offers 384 products in their lineup. They hold 5 verified certifications including Consumerlab, Health Canada Licensed, Nsf Gmp, Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. Note: Jamieson has 8 historical regulatory incidents on record, which are factored into the trust score.

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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.