Dr. Mercola Vitamin D3 and K2 - 90 Capsules

What to Consider When Choosing a D3 and K2 Supplement

Selecting a high-quality vitamin D3 and K2 supplement requires attention to dosage, form, and purity. Dr. Mercola's formula provides 5,000 IU of cholecalciferol (D3) and 180 mcg of menaquinone-7 (K2) per capsule, a ratio that many health professionals recommend. The capsules are free from soya, gluten, and GMOs, and uses an advanced delivery system to enhance absorption. When choosing a supplement, look for the MK-7 form of K2, as it has a longer half-life than MK-4, and ensure third-party testing for purity.

The Synergistic Action of D3 and K2

Vitamin D3 increases the production of calcium-binding proteins in the intestine, enhancing the absorption of calcium from food. Vitamin K2 activates two proteins, matrix GLA protein (MGP) and osteocalcin, which help direct calcium into the bone matrix and prevent its deposition in soft tissues. This complementary action ensures that calcium is utilised effectively, supporting bone density and strength. The synergy explains why these nutrients are often taken together, especially at higher doses.

Approved Health Benefits

Bone Health: Vitamin D contributes to normal calcium absorption and the maintenance of normal bones. Vitamin K also contributes to the maintenance of normal bones, making this combination valuable for skeletal strength.

Immune Function: Vitamin D contributes to the normal function of the immune system.

Normal Blood Coagulation: Vitamin K contributes to normal blood clotting.

These benefits are supported by authorised European Food Safety Authority (EFSA) health claims.

Why Combine D3 and K2?

Taking D3 and K2 together optimises calcium utilisation. Without K2, calcium absorbed with the help of D3 may accumulate in arteries or other soft tissues rather than being deposited in bones. By combining them, you support proper calcium balance, which is essential for maintaining strong bones. Many health care professionals recommend this combination, particularly for those with higher requirements.

Dosage Recommendations

For most adults, one capsule daily provides ample support. The 5,000 IU of vitamin D3 helps maintain healthy blood levels, while 180 mcg of K2 (as MK-7) offers sustained benefits. As with any supplement, consult your health care professional before starting, especially if you are taking anticoagulant medication (vitamin K may interact with warfarin).

Frequently Asked Questions

Can I take D3 and K2 separately? Yes, but taking them together ensures synergistic calcium utilisation and convenience.

What is the best time to take them? With a meal containing fat, as both vitamins are fat-soluble.

Are there side effects? Most people tolerate them well, but excessive vitamin D can lead to toxicity. Stick to recommended dosages.

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