Essential Vitamin Complex

Woman doing yoga at the beach

Vitamin D, the sunshine vitamin, has been touted as the most important supplement under the sun—and for good reason. As many as 75% of Americans may be insufficient, because not only is it virtually impossible to get enough from food, but in today’s digital age, it’s unlikely you’re getting enough from the sun. For these reasons, high-doses of 5,000 IU or more are often recommended to support everything from bone and heart health to mood.

But, how often has someone recommended that you combine your high-dose of vitamin D with vitamin K and vitamin A? Together, these three powerful vitamins join forces to support your bones, heart, and immune system.

Here’s how it works. Vitamin D plays a critical role in calcium absorption into the bloodstream. Vitamin K is required to transport calcium from the bloodstream into the bone, supporting bone density and cardiovascular health. Additionally, vitamin A works with vitamin D to support your immune system.1-4

Bulletproof™ A-D-K is a convenient source of streamlined, long-lasting support that strengthens your bones, heart, and immune system. A-D-K packs vitamins A (as retinyl palmitate), D3, K1 and K2 (as MK-4 and MK-7) into a convenient 5-in-1 punch. All forms of vitamins A, D and K are fat-soluble, which means they dissolve in fats and oils. Fat-soluble vitamins are absorbed along with fats in your diet and remain in the body longer than water-soluble vitamins. Bulletproof A-D-K uses a proprietary Brain Octane™ oil softgel to further aid in absorption of these fat-soluble vitamins.

  • Retinol (from retinyl palmitate) is bioavailable vitamin A, the form your body uses.
  • D3 (cholecalciferol) is the same form of vitamin D produced by the body from sun exposure.
  • Full-spectrum vitamin K provides three forms that can be used by the body, including K1 and the dynamic duo of K2 (MK-4 and MK-7). Supplementing with the three Ks allows both rapid and sustained availability because each of them are utilized by the body differently.


1. AmJClinNutr 2012; 96(5):1166S-72S.
2. ThrombHaemost 2015; 113(5):135-44.
3. Osteo.Intl 2013; 24(9):2499-507.
4. RevEndocrMetabD 2017; 18(2):153-165.