Vitamin D3 and vitamin K2 are both fat-soluble vitamins, and they are frequently sold together in a single supplement. Understanding why they are paired requires knowing what each one does in the body.
What is vitamin D3?
Vitamin D3, or cholecalciferol, is the form of vitamin D that the skin produces when exposed to sunlight. It is also found in small amounts in fatty fish and egg yolks. D3 plays a central role in calcium absorption — it enables the intestines to absorb calcium from food. Without adequate D3, the body absorbs calcium poorly regardless of dietary intake.
Many people in Lebanon and across the Middle East have lower vitamin D levels than expected, partly because sun exposure varies and partly because few foods are high in D3. Supplementing with D3 is one of the most common nutritional choices worldwide.
What is vitamin K2?
Vitamin K2 is a form of vitamin K distinct from K1 (found in leafy greens). The most studied form of K2 is MK-7, which is derived from fermented foods and has a long half-life in the body, meaning it remains active for longer. K2 activates proteins involved in directing calcium to bones and teeth, and supports the normal transport of calcium within the body.
Why are D3 and K2 taken together?
D3 increases calcium absorption from the digestive tract. K2 supports the proteins that direct where that calcium goes in the body. Together, they are considered complementary for supporting bone health. This is why supplement manufacturers commonly pair them in a single capsule or softgel.
What does 5000 IU mean?
IU stands for International Unit, the standard measurement for fat-soluble vitamins. 5000 IU is a commonly available dose of D3. The appropriate dose varies by individual — your doctor can advise based on a blood test. For reference, most adults in populations with limited sun exposure use between 1000 IU and 5000 IU daily.
What does MK-7 mean?
MK-7 refers to menaquinone-7, a specific form of K2. It is considered particularly bioavailable and has a longer half-life in the body compared to other K2 forms such as MK-4. Most D3+K2 supplements on the market use MK-7 because of its stability and activity duration.
Available product
Supplements & More carries Horbäach Vitamin D3 5000 IU + K2 MK-7 100 mcg (180 softgels) — approximately six months' supply at one per day. Imported from the United States, delivered across Lebanon with cash on delivery.