Vitamin K2 MK-4 Ultra K2 - Supports Bone & Cardiovascular Health

In this review of Ultra K2 MK-4, the bottom line is straightforward: this supplement is best for people seeking a concentrated, hypoallergenic form of vitamin K2 to support bone and cardiovascular health. The reviewer found the 15 mg MK-4 dosage per capsule to be the single biggest reason to consider it, because that concentrated form specifically supports healthy calcium utilization and connective tissue maintenance. This review is aimed at readers who want a focused K2 supplement without common allergens and prefer a small, easy-to-swallow capsule.

Key Features

• 15 mg MK-4 per capsule: Provides a high-strength dose of the MK-4 form of vitamin K2 to support healthy bone metabolism and calcium use.
• Supports bone and connective tissue: MK-4 helps activate calcium-binding proteins so calcium is directed to bones and other tissues where it is needed.
• Cardiovascular support: The K2 form in this formula has been studied for its role in maintaining healthy cardiovascular function alongside bone health.
• Hypoallergenic and vegan: Free from milk, eggs, fish, tree nuts, gluten, soy, corn and other common allergens, making it suitable for restricted diets.
• No artificial additives: The product contains no artificial colors, flavors, or preservatives, which reduces exposure to unnecessary ingredients.

Who It's For

This product suits adults who have discussed vitamin K2 with their practitioner and want a targeted MK-4 supplement to support bone health and healthy calcium utilization. It also works well for people with dietary sensitivities or anyone seeking a vegan, non-GMO option without common allergens.

It may be less appropriate for someone looking for a full-spectrum vitamin K complex that combines K1 and multiple K2 homologs, or for anyone who needs an extremely low daily dose; the formula is explicitly a concentrated MK-4 product and best used under healthcare guidance.

Pros & Cons

Pros

• High-strength 15 mg MK-4 dose supports bone metabolism and connective tissue maintenance.
• Hypoallergenic and vegan formulation reduces risk for those with food sensitivities.
• Small capsule size and clean ingredient list make daily use convenient.

Cons

• Higher-strength MK-4 may be more than some users need, and should be taken under professional advice.
• Some customers find the price on the premium end despite positive quality feedback.

Specifications

Brand	SFI Health (formerly Klaire Labs)
Active ingredient	Vitamin K2 (MK-4)
Amount per capsule	15 mg MK-4
Capsules per bottle	90
Suitable for	Vegan, non-GMO, hypoallergenic
Free from	Milk, eggs, fish, shellfish, tree nuts, peanuts, wheat, gluten, soy, corn, yeast

Our Verdict

Ultra K2 MK-4 is a focused, high-strength vitamin K2 supplement that delivers a concentrated 15 mg MK-4 dose in a hypoallergenic, vegan capsule. It is a sensible choice for adults seeking targeted support for bone and cardiovascular health, particularly those with dietary restrictions, though individuals should confirm dosing with their healthcare practitioner to ensure it fits their regimen and budget.

Frequently Asked Questions

Is this product vegan?
Yes, the formula is vegan, non-GMO, and free of common allergens listed on the label.

What does MK-4 support?
MK-4 supports healthy bone metabolism by activating calcium-binding proteins and can help support connective tissue and cardiovascular health.

How many capsules are included?
Each bottle contains 90 capsules, with 15 mg of MK-4 per capsule.