Bronson Vitamin D3 10000 IU + Vitamin K2 (MK7) 120 mcg | 200 Tablets

Bronson Vitamin D3 10,000 IU + K2 120 mcg is a dual formula in a 200 tablet bottle that brings high-potency vitamin D3 together with vitamin K2 in a single tablet, supporting calcium absorption, its direction toward bone, and normal immune function. The two vitamins work together rather than separately: vitamin D3 raises calcium absorption from the intestine, and vitamin K2 takes part in directing that calcium into bone tissue, which is why they are formulated as a pair. At one tablet daily, 200 tablets suit anyone tracking their vitamin D level over the long term under medical supervision.

What are vitamin D3 and vitamin K2?

Vitamin D3, or cholecalciferol, is a fat-soluble vitamin synthesised in the skin under ultraviolet light and behaving in the body more like a steroid hormone than a conventional vitamin. Vitamin K2, or menaquinone, is also fat-soluble, found in fermented foods and animal products, and differs from vitamin K1 (phylloquinone) in leafy greens by remaining in circulation longer and reaching tissues beyond the liver, such as bone and blood vessels.

Benefits of vitamin D3 with K2

• Bone health support: Vitamin D3 contributes to calcium absorption, while vitamin K2 takes part in activating the bone proteins that bind it.
• Immune support: Vitamin D receptors sit on the surface of most immune cells, and its availability is linked to their normal function.
• Vascular health support: Vitamin K2 participates in activating matrix GLA protein, associated with calcium staying where it belongs.
• Muscle function support: Vitamin D is linked to normal muscle function and strength.
• Dental health support: Tooth tissue is mineralised tissue that relies on calcium and on vitamin K2-dependent proteins.
• Mood support: Vitamin D availability is associated with normal mood balance.
• Covering limited sun exposure: Useful for anyone spending most of their time indoors or keeping the body covered.

Active ingredients

• Vitamin D3, 10,000 IU: the form closest to what the skin produces naturally, raising calcium and phosphorus absorption from the intestine and supporting immunity.
• Vitamin K2, 120 mcg: the cofactor for the gamma-carboxylase enzyme that activates the proteins responsible for binding calcium into bone tissue.

How vitamin D3 and K2 work in the body

Once taken, vitamin D3 passes through two activation steps: the first in the liver, where it becomes 25-hydroxyvitamin D, the stored form that blood tests measure, and the second in the kidneys, where it becomes calcitriol, the active form that binds the vitamin D receptor inside the cell nucleus and switches on transcription of the genes handling calcium transport across the intestinal wall. Vitamin K2, for its part, acts as the cofactor for gamma-glutamyl carboxylase, the enzyme that adds a carboxyl group to specific proteins, chiefly osteocalcin in bone and matrix GLA protein in vessel walls. That chemical step is what gives both proteins their ability to bind calcium, and it is why the two vitamins are described as complementary: one raises calcium availability, the other activates the proteins that direct it.

What sets this formula apart

The Bronson formula combines both vitamins in one tablet at two high amounts, 10,000 IU of vitamin D3 and 120 mcg of vitamin K2, removing the need to take two separate products and coordinate their timing. Vitamin K2 is commonly found as MK-4 and MK-7, which differ in how long they persist in the blood and how far they reach tissues outside the liver, a distinction worth weighing when comparing products. The vitamin D here is D3 rather than D2, and that difference matters: D3 is the form the skin itself produces and raises blood 25-hydroxyvitamin D more efficiently than plant-derived D2. The tablet is swallowed with a meal containing fat, since both vitamins are fat-soluble.

Who is this product for?

• Anyone spending most of the day indoors with little sun exposure.
• People tracking their blood vitamin D level with a doctor who need a high amount under supervision.
• Anyone focused on bone health who wants vitamin K2 alongside vitamin D rather than one alone.
• People who prefer a single product combining both vitamins over buying two separate bottles.
• Older adults, whose skin synthesises vitamin D less efficiently with age.

How to use

Take one tablet of Vitamin D3 10,000 IU + K2 120 mcg daily, preferably with a meal containing fat, since both vitamins are fat-soluble and absorb better in its presence, or as directed by a healthcare professional. High amounts of vitamin D should be taken under medical supervision with monitoring of blood vitamin D and calcium, and the amount stated on the label should not be exceeded.

Product details

• Form: tablet
• Per tablet: vitamin D3 10,000 IU + vitamin K2 120 mcg
• Count: 200 tablets
• Brand: Bronson, United States

Frequently asked questions

Why is vitamin K2 combined with vitamin D3?

Vitamin D3 raises calcium absorption from the intestine, and vitamin K2 activates the proteins that bind that calcium into bone tissue, such as osteocalcin. Combining them means the available calcium finds the proteins ready to direct it, which is why they are formulated together.

What is the difference between vitamin D3 and vitamin D2?

Vitamin D3 is cholecalciferol, the form human skin produces under sunlight, while vitamin D2 is ergocalciferol, derived from fungal and plant sources. D3 raises blood 25-hydroxyvitamin D more efficiently and holds it more steadily than D2, and D3 is the form used in this product.

Should vitamin D3 and K2 be taken with food?

Yes. Vitamin D3 and vitamin K2 are both fat-soluble, and absorption improves when the tablet is taken with a meal containing some healthy fat. Taking them on an empty stomach reduces the proportion absorbed.

Caution

Not for pregnancy, breastfeeding or under 18. Consult a doctor if on chronic medication, especially warfarin.