Liposomal Vitamin D3 & K2 Oral Spray - 1000 to 3000IU Liposomal Vitamin D3 & K2 Oral Spray - 1000 to 3000IU Well.Actually. With flexible dosing of 1000 IU (25 mcg) vitamin D per spray, it's a great way to help optimise the body's immune, bone, muscle and brain-supporting capabilities.