One drop contains your daily dose of 2500IU of vitamin D3 in a base of medium chain triglycerides for enhanced absorption. And, it fits right in your pocket, purse or backpack for on-the-go.Β We need this vitamin for many different things β calcium absorption, immune function, mood health, skin health, cardiovascular function, hormone balance, and even more. We choose D3 for our vitamin D supplements, because itβs the most natural form of vitamin D, and itβs easily absorbed in the body.