One issue to consider here is this is made from lanolin. I thought I researched it carefully for myself, however, this was not noted clearly in the description on Amazon until I got the bottle and read the fine print with my glasses. Now, after spending my first night taking one pill at bedtime, I was up with a very uncomfortable heart burn pain. If you are like me and know you are allergic to wearing wool, please do yourself a favor and skip this product. Drs. Best does make a vegan D3. I would like to try it. If you are allergic to wool you may, like me, react to this D3 made from a derivative of sheep wool, lanolin