Vitamin D3 done right: 5,000 IU paired with K1, K2 and magnesium to support your bones, immunity and MOOD · MIND · MEMORY.

Many people don't get enough vitamin D from sunlight, especially in winter or when working indoors. But vitamin D3 works best with partners. Opti D3 Plus combines 5,000 IU of vitamin D3 with MenaQ7® vitamin K2, vitamin K1 and magnesium, so your body can absorb and use D3 effectively and help direct calcium to your bones.

Why you'll love Opti D3 Plus

• Supports healthy vitamin D levels with 5,000 IU of D3 (cholecalciferol) per capsule
• Supports strong bones and healthy calcium balance with vitamin K1 and MenaQ7® K2 (MK-7)
• Supports immune function and a positive mood
• Better utilization: magnesium helps your body activate vitamin D
• One capsule a day, 90 capsules per bottle

What's inside (per capsule)

• Vitamin D3 (as cholecalciferol), 125 mcg (5,000 IU): the same form of vitamin D your skin makes from sunlight
• Vitamin K2 (as MenaQ7® PharmaPure, MK-7), 50 mcg: a long-acting, soy-free form of K2 that helps direct calcium to bones
• Vitamin K1, 300 mcg: supports normal blood clotting and bone health
• Magnesium (as dimagnesium malate), 120 mg: a gentle, well-absorbed form that helps activate vitamin D

Soy-free, dairy-free and gluten-free. Other ingredients: vegetable capsule.

How to use

Take 1 capsule daily, or as directed by your healthcare practitioner. Each bottle contains 90 capsules.

Quality you can trust

Opti D3 Plus is made in the USA in a GMP-certified, FDA-registered facility and is lab-tested for purity and potency.

Frequently asked questions

Why does Opti D3 Plus include magnesium?
Vitamin D has to be activated before your body can use it, and the enzymes in your liver and kidneys that do this depend on magnesium. Without enough magnesium, even a high dose of D3 may not do its job. Yet nearly half of U.S. adults don't get enough magnesium from their diet, which can limit how well vitamin D is activated and used. Opti D3 Plus is a physician-developed formula designed to work around this common gap: every capsule pairs 5,000 IU of D3 with 120 mg of well-absorbed dimagnesium malate, so the magnesium your body needs comes built in.

Why take vitamin K with vitamin D3?
D3 increases calcium absorption, and vitamin K2 helps direct that calcium to your bones. They are a natural team.

Is Opti D3 Plus soy-free?
Yes. The vitamin K2 is MenaQ7® PharmaPure, a soy-free form of MK-7, and the full formula is soy-free, dairy-free and gluten-free.

Scientific references

1. Holick MF. Vitamin D Deficiency. New England Journal of Medicine. 2007;357(3):266-281. doi.org/10.1056/NEJMra070553
2. Uwitonze AM, Razzaque MS. Role of Magnesium in Vitamin D Activation and Function. The Journal of the American Osteopathic Association. 2018;118(3):181. doi.org/10.7556/jaoa.2018.037
3. Dai Q, Zhu X, Manson JE, et al. Magnesium status and supplementation influence vitamin D status and metabolism: results from a randomized trial. The American Journal of Clinical Nutrition. 2018;108(6):1249-1258. doi.org/10.1093/ajcn/nqy274
4. Rosanoff A, Weaver CM, Rude RK. Suboptimal magnesium status in the United States: are the health consequences underestimated? Nutrition Reviews. 2012;70(3):153-164. doi.org/10.1111/j.1753-4887.2011.00465.x
5. Schwalfenberg GK. Vitamins K1 and K2: The Emerging Group of Vitamins Required for Human Health. Journal of Nutrition and Metabolism. 2017;2017:1-6. doi.org/10.1155/2017/6254836
6. Knapen MHJ, Drummen NE, Smit E, et al. Three-year low-dose menaquinone-7 supplementation helps decrease bone loss in healthy postmenopausal women. Osteoporosis International. 2013;24(9):2499-2507. doi.org/10.1007/s00198-013-2325-6

*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.