Vitamin D3 K2 5,000 IU Liquid Drops (5,000 IU of D3 and 200mcg

What the brand says

Sold as “Vitamin D3 K2 5,000 IU Liquid Drops (5,000 IU of D3 and 200mcg of 99.9% All-Trans Patented K2 MK-7 (K2Vital)) Max Absorption Liquid Vitamin D Drops (30 Servings) by Double Wood (Pack of 2)”

Vitamin D plays a key role in the immune response