Bronson Vitamin K2 (MK7) with D3 Supplement Non-GMO Formula 5000 IU Vitamin D3 & 90 mcg Vitamin K2 MK-7 Easy to Swallow Vitamin D & K Complex, 120 Capsules
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63/100
Standard
Six-dimension breakdown
Evidence
68
Formulation
68
Manufacturing
62
Safety
60
Transparency
58
Sustainability
60
Why this scored 63/100
Bronson is a mid-market vitamin brand (founded 1960, Utah — 'Vitamins from A to Zinc' era). Formulation is exactly what a D3+K2 buyer wants: 5,000 IU D3 (cholecalciferol) + 90mcg K2 as MK-7 (the long-half-life form validated by Sato 2020 for arterial calcification). Dose is at the top of the maintenance range (5,000 IU is the higher-dose end; some deficient users benefit, but many non-deficient adults hit the 4,000 IU IOM UL). The MK-7 90mcg is a defensible daily dose per the K2 rotterdam-study derived range. Non-GMO claim is disclosed. Held to Standard by (1) 5,000 IU D3 without a caveat about testing serum 25(OH)D — many users overshoot with this dose, (2) no third-party COA published, (3) mid-tier brand without USP verification. A perfectly reasonable, unglamorous D3+K2.
The Vyvata score's Evidence dimension measures the quality of published RCT support for a product's active ingredients at the label dose. Our source hierarchy: double-blind RCTs in MEDLINE-indexed journals > single-blind RCTs > open-label trials > observational studies > mechanism papers > N=1 case studies (anecdotes). Predatory journals and manufacturer-authored studies without independent replication are weighted down.
Product-specific evidence citations for this item are embedded in the analysis text on the "Analysis" tab. For the full framework and evidence hierarchy, see the methodology page.
How to read the Evidence dimension
80–100: Multiple double-blind RCTs in indexed journals directly testing this product OR the exact ingredients at the exact dose.
60–79: Single double-blind RCT + supporting ingredient literature at the studied dose.
40–59: Open-label trials + ingredient literature; no product-specific double-blind evidence.
20–39: Ingredient literature only; no product-specific trials or trials in predatory venues.
0–19: No credible evidence base or unverifiable claims.
FAQ data has not been generated for this product yet. See the site FAQ for general questions.
Customer reviews
Reviews on other platforms
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VSF score
63 / 100
Tier
Standard
Category
Supplements
Subcategory
vitamins micronutrients
Last scored
Third-party certifications
None on record at time of scoring
Vendor
NutritionAdvice
Product type
Supplements & Vitamins
Tags
NutritionAdvice, Shopify Collective
Every score is set from the published rubric, audit-logged, and rescored whenever new evidence emerges (published trials, updated labels, third-party testing releases). Every vendor is scored on the same criteria — no pay-to-play. See our editorial-independence disclosure for the full policy, including brands with an editorial relationship to this site.
