What is an all white capsule with no writing on it?

An all-white capsule with no writing on it could potentially be a variety of medications or supplements, as many pharmaceuticals and over-the-counter products come in such forms. However, because there are no distinguishing marks, it is difficult to identify its contents or purpose without additional information. If you find an unidentified capsule, it's best to consult a healthcare professional or pharmacist for advice.