Our Vive Biotics is 100% natural with nothing added and absolutely no fillers. It is flavored with Monk Fruit and Stevia to give it the grape flavor. The monk fruit can cause it to change colors due to seasonal changes. In nature, not one fruit looks exactly the same (including color) and a completely natural product does not have the same appearance unless someone is doctoring the product. Because we are 100% natural and do use 100% natural Monk Fruit, this might cause the color difference.