Vitamin D3 5000 IU + Vitamin K2 MK-7 90 mcg | 360 Capsules | Bronson

Vitamin D3 5,000 IU + K2 90 mcg by Bronson is a dual formula in a 360-capsule bottle, pairing the two fat-soluble vitamins that share responsibility for calcium handling in the body. One daily capsule delivers 5,000 IU of vitamin D3 alongside 90 mcg of vitamin K2 in the MK-7 form. It suits anyone who would rather not buy the two vitamins separately and prefers a single bottle covering close to a full year of daily use.

What are vitamin D3 and vitamin K2?

Vitamin D3 is cholecalciferol, the same form the skin produces on exposure to ultraviolet light, and it behaves more like a steroid hormone than a classical vitamin. Vitamin K2 is menaquinone, and the MK-7 form is typically obtained through bacterial fermentation. Both are fat soluble and are absorbed through the lymphatic route alongside dietary fat.

Benefits of vitamin D3 and vitamin K2

• Bone density support: vitamin K2 directs calcium towards bone tissue while vitamin D3 raises how much calcium is available to absorb in the first place.
• Dental health support: the vitamin K dependent proteins take part in the mineralisation of dentine and enamel.
• Immune support: vitamin D receptors are found on numerous immune cells including T cells and macrophages.
• Cardiovascular support: vitamin K2 contributes to activating a protein linked to how calcium is distributed outside bone tissue.
• Muscle function support: vitamin D3 is associated with contractile strength and with balance.
• Mood and daily energy support: research links vitamin D status with general mood.
• Complementary action: raising absorbed calcium without directing it is only half the story, and that is what vitamin K2 adds to vitamin D3.

Active ingredients

• Vitamin D3 5,000 IU: cholecalciferol, which raises the efficiency of calcium and phosphorus absorption from the gut.
• Vitamin K2 90 mcg: menaquinone-7, which activates the vitamin K dependent proteins that bind calcium where it belongs.

How it works in the body

Vitamin D3 passes through two hydroxylation steps: the first in the liver producing 25-hydroxyvitamin D, the stored form measured in blood tests, and the second in the kidney producing calcitriol, the active form. Calcitriol binds the vitamin D receptor inside the intestinal cell and drives synthesis of calbindin, the protein that carries calcium across the gut wall. Vitamin K2 meanwhile acts as a cofactor for the vitamin K dependent carboxylase enzyme, which adds a carboxyl group to osteocalcin, converting it from an inert form into one able to bind calcium and fix it within the bone matrix.

What sets this formula apart

The most significant choice in the Bronson formula is MK-7 rather than MK-4 as the vitamin K2 form. The two differ in blood half-life: MK-7 stays in circulation far longer, which is why a single daily dose is enough, whereas MK-4 needs repeating through the day because of its short persistence. The 5,000 IU vitamin D3 dose is a common higher-strength level for people correcting a shortfall confirmed by testing. At 360 capsules, one purchase covers a long stretch of daily use without repeat ordering.

Who is this product for?

• People taking higher-dose vitamin D who want vitamin K2 in the same capsule.
• People who spend most of the day indoors with limited sun exposure.
• Adults focused on bone density as they age.
• People who prefer one large bottle over a run of small ones.
• People whose diet is low in oily fish and fermented foods.

How to use

One capsule daily of the vitamin D3 5,000 IU + K2 90 mcg formula, taken with a meal containing fat. Both vitamins are fat soluble, and having oil, butter or nuts in the same meal raises how much is taken up. The main meal of the day is the practical choice.

Product details

• Form: capsule.
• Dose per tablet: 5,000 IU vitamin D3 + 90 mcg vitamin K2.
• Count: 360 capsules.
• Brand: Bronson, United States.

Frequently asked questions

Why are vitamin D3 and vitamin K2 combined in one formula?

Vitamin D3 raises the amount of calcium absorbed from the gut, and vitamin K2 activates the proteins that determine where that calcium settles. Combining them in one capsule means the absorption step and the routing step happen together on a single daily dose.

What is the difference between vitamin K2 as MK-7 and as MK-4?

The MK-7 form used in this formula remains in the blood far longer than MK-4, so one daily dose is sufficient. MK-4 has a shorter circulating life and needs repeated doses across the day.

Should the capsule be taken on an empty stomach?

Vitamin D3 and K2 capsules are better taken with a meal containing fat rather than on an empty stomach. Both vitamins are fat soluble, and absorption is less efficient without dietary fat present.

Cautions

• Not intended for pregnant or nursing women.
• Not intended for anyone under 18 years of age.
• Consult a doctor when taking long-term medication, particularly anticoagulants.
• Not a substitute for a balanced diet.