Vitamins A, D3, and K2 are all fat-soluble.

All are important for the heart, the immune system, and building bones.

Research studies during the height of COVID found that vitamins D and K worked synergistically to help protect against lung damage.

In studies on heart function, taking vitamin D and calcium without having sufficient vitamin K increased risk of heart disease.

Vitamin A enhances the effects of vitamin D in building bone, while vitamins D and K promote the absorption of vitamin A.

Each of these vitamins becomes more effective when taken with the other two.

To keep arteries smooth, flexible, and free of clogs and blockages, and the bones and immune system strong, take a daily combination of vitamins A, D, and K in their optimal forms: vitamin A as retinyl palmitate, vitamin D3 as cholecalciferol, and vitamin K2 as menaquinone-7.