**Vitamin D3** at 5,000 IU hits the top of the clinically studied maintenance range, giving you a full effective dose for bone health, immune support, and mood regulation in a single capsule. If you're correcting a deficiency or living in a northern climate, this is the dose range most practitioners recommend — no need to double up.

**Vitamin K2** is dosed at 120 mcg in the MK-7 form, which stays active in your body for roughly four days — far longer than the MK-4 form that clears in hours. At this dose, you're getting enough to help direct calcium into your bones and teeth rather than your arteries. The capsule also includes MCT oil, which helps absorption since both vitamins are fat-soluble.

The main limitation is that 120 mcg of K2 sits in the lower half of the studied range (90–200 mcg). If bone density is your primary goal, you may benefit from a product closer to 200 mcg.

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BioStacks

California Gold Nutrition

Vitamin D3 + K2 as MK-7

Capsule · 60 servings · $0.15/serving

85 / 100Excellent

Score Breakdown

Formulation
97
Safety
85
Final score
85/100

Ingredients (2)

Vitamin D5000 IU

Exceeds UL · Premium form

Vitamin K2120 mcg

Optimal dose · Premium form

Label Nutrition Facts

Active Ingredients

From the label · % Daily Value

DV%

Vitamin D5000 IU

833%

Vitamin K2120 mcg

100%

Other Ingredients

Fillers, coatings, and additives

6Safe

Magnesium StearateLubricant

Safe

Medium Chain Triglyceride OilCarrier

Safe

Silicon DioxideAnti-caking

Safe

Dicalcium PhosphateBinder

Safe

Microcrystalline CelluloseBinder

Safe

Microcrystalline CelluloseBinder

Safe

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from: NIH Office of Dietary Supplements and National Academies Dietary Reference Intakes (DRI).

This is not medical advice. Consult a healthcare provider before making changes to your supplement routine.

The score analyzes what's on the label: ingredient doses vs. clinical ranges, chemical forms, evidence levels, and known interactions. It does not verify label accuracy or test for contaminants — for that, look for third-party certifications like USP or NSF.