KD Ultra - Full Spectrum Vitamin K2 (MK-4,6,7,9) & Vegan D3, 90 Capsules

Why Vitamin K2 and D3 Work Together

Discover Arthur Andrew Medical, — Vitamin K2 and D3 form a synergistic duo that supports calcium balance, immune health, and bone strength. Vitamin D contributes to the normal absorption and utilisation of calcium, as well as the normal function of the immune system. Vitamin K contributes to normal blood clotting and the maintenance of normal bones. Together, they help direct calcium to where it is needed most—your bones and teeth—while supporting overall cardiovascular health. *

The full spectrum of Vitamin K2 in KD Ultra—including MK-4, MK-6, MK-7, and MK-9—provides a range of menaquinones that may offer broader benefits than MK-7 alone. MK-4 is involved in cellular energy metabolism, while longer-chain menaquinones like MK-9 support various tissue-specific functions.

Who Should Consider a Vitamin K2 + D3 Supplement?

Many people do not get enough Vitamin D from sun exposure and food, especially in northern climates. Vitamin K2 is also less common in modern diets, with fermented foods like natto being one of the few rich sources. If you are looking to support bone density as you age, maintain heart health, or bolster your immune system, a combined K2 and D3 supplement may be beneficial. Vegans and vegetarians will appreciate the plant-based D3 source in KD Ultra.

Introducing KD Ultra

KD Ultra by Arthur Andrew Medical is a targeted supplement that combines full spectrum Vitamin K2 and vegan Vitamin D3. Each capsule delivers 2500 IU of plant-based Vitamin D3 and a comprehensive blend of Vitamin K2 in its naturally occurring forms—MK-4, MK-6, MK-7, and MK-9. By pairing these two fat-soluble vitamins, KD Ultra helps maintain calcium balance in the body, directing calcium to bones and teeth where it is needed most.

Top Ingredients in KD Ultra

Full Spectrum Vitamin K2 (Menaquinones): A proprietary blend of MK-4, MK-6, MK-7, and MK-9. MK-7 is derived from natto (fermented soya), while other forms may come from bacterial fermentation. This diversity may support both rapid and sustained activation of vitamin K-dependent proteins.

Vegan Vitamin D3 (Cholecalciferol 2500 IU): Derived from lichen, this plant-based D3 is identical to the D3 produced in human skin upon sun exposure. Vitamin D3 supports calcium absorption, immune cell function, and bone mineralisation.

Selecting a Quality Supplement

When choosing a K2/D3 supplement, consider the forms and dosages. For Vitamin K2, look for products that include MK-7, as it has a longer half-life in the body. A full spectrum like KD Ultra offers additional menaquinones that may provide complementary benefits. For Vitamin D3, a moderate dose around 2500 IU is suitable for daily maintenance without exceeding the tolerable upper intake level for most adults. Always choose supplements from reputable brands that follow Good Manufacturing Practice (GMP) and third-party test for purity and potency.

KD Ultra is free from common allergens and uses vegan-sourced Vitamin D3, making it a clean choice for those with dietary restrictions.

FAQs About Vitamin K2 and D3

Can I take KD Ultra with other supplements? Yes, but if you are taking blood thinners (e.g., warfarin), consult your health care provider as Vitamin K can interact with these medications.

Is it safe to take 2500 IU of Vitamin D3 daily? For most adults, 2500 IU is a safe maintenance dose well below the upper limit of 4000 IU. However, individual needs vary, so it is wise to check your vitamin D levels with a blood test.

Why include multiple forms of Vitamin K2? Each menaquinone has a different half-life and tissue distribution. MK-4 is rapidly utilised, while MK-7 remains active longer, providing sustained support. The full spectrum aims to cover both short- and long-term needs.

Our Recommendation

KD Ultra offers a well-researched combination of Vitamin K2 and D3 in their most bio-available forms. With a full spectrum of menaquinones and vegan D3, it meets the needs of health-conscious individuals seeking comprehensive support for bones, heart, and immunity. As with any supplement, it should complement a balanced diet and healthy lifestyle, not replace them.

*These statements have not been evaluated by the Medicines and Health care products Regulatory Agency (MHRA). This product is not intended to diagnose, treat, , or prevent any disease. Always read the label and follow the directions for uses.