**Vitamin D3** at 10,000 IU per softgel — that's double the top end of the clinical maintenance range (1,000–5,000 IU/day) and 2.5x the tolerable upper limit of 4,000 IU. This is a dose typically reserved for short-term deficiency correction under medical supervision, not daily maintenance. If your doctor has confirmed a significant deficiency via blood work, this dose makes sense temporarily. For routine supplementation, you'd want to take this every few days rather than daily.

**Vitamin K2** at 100 mcg in the MK-7 form is well-chosen — right in the studied range of 90–200 mcg, and MK-7 has a long half-life (~96 hours), so it stays active in your body for days. The D3 and K2 pairing is clinically meaningful: D3 increases calcium absorption while K2 directs that calcium into your bones and teeth instead of your arteries. The coconut MCT oil base also helps absorption since both vitamins are fat-soluble.

The plant-based sourcing (D3 from lichen, K2 from chickpea) makes this one of the few vegan-friendly D3+K2 options. The main concern is that high-dose D3 at 10,000 IU daily can raise blood calcium to unsafe levels over time — if you're using this for maintenance rather than correcting a deficiency, discuss dosing frequency with your healthcare provider.

BioStacks
Sports Research

D3 + K2, Plant-Based, 250 mcg/100 mcg, 60 Veggie Softgels

Softgel · 60 servings · $0.43/serving

69 / 100Good

Score Breakdown

Formulation
96
Safety
70
Final score
69/100

Ingredients (2)

Vitamin D3Synergy10000 IU

Above upper limit · Premium form

Vitamin K2Synergy100 mcg

Within effective range · Premium form

Label Nutrition Facts

Other Ingredients

Fillers, coatings, and additives

2Safe

Medium Chain Triglyceride OilCarrier

Safe

Capsule ShellCapsule

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.