**Vitamin D3** at 5,000 IU per capsule puts you right at the top of the clinically studied range for maintaining healthy blood levels, supporting bone density, and bolstering immune function. Paired with **Vitamin K2** at 180 mcg — near the ceiling of the effective range — this combination ensures the calcium your body absorbs actually gets directed to your bones and teeth rather than building up in your arteries.

The K2 here uses MenaQ7, an MK-7 form with a half-life of roughly 96 hours, meaning a single daily capsule keeps it active in your system for days. That long-lasting activity is what makes MK-7 the preferred form for sustained bone and cardiovascular support. The capsule directions suggest taking it with a fat-containing meal, which matters since both vitamins are fat-soluble.

At 5,000 IU, you're above the official tolerable upper limit of 4,000 IU, which is safe for most adults but worth discussing with your doctor if you haven't tested your blood levels recently.

BioStacks
NOW

Mega D-3 5000 IU & MK-7 180 mcg

1 Capsule · 120 servings

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What it does

A combination of 2 label ingredients.

Vitamin K

menaq7Premium

Supports normal blood clotting and activates proteins involved in maintaining bones.

Vitamin D

vitamin d3Premium

Cholecalciferol (vitamin d3): Supports normal bones; D3 generally raises vitamin D blood levels more than comparable D2 doses.

Bone & JointImmuneDental
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Ingredients (2)

Other ingredients

Silicon DioxideAnti-caking

Fine silica powder used to prevent clumping

HypromelloseCapsule

Plant-derived capsule material from cellulose

Microcrystalline CelluloseBinder

Plant-derived cellulose used as a binder and filler in supplements

Lab testing

How to take it

With a meal containing fat

On the label

Suggested use: Take 1 capsule daily with a fat-containing meal.

Price check

$28.16

$10$20

Pricier than 84% of 552 vitamin D supplements

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Sources & Scoring

Nutrient data (RDA, UL, and safety thresholds) sourced from the NIH Office of Dietary Supplements and the 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. studied 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.

Not medical advice. Consult your healthcare professional.

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