Do: Store supplements in a cool and dark place. Like many skin care ingredients, the effectiveness of supplements can be greatly reduced if they are exposed to heat and light. Supplements that contain essential fatty acids, such as fish and krill oils, should be kept in the refrigerator. Don't: Take supplements with tea or coffee. These beverages contain caffeine and tannins, which can interrupt the body's absorption of supplements. The best drink to pair with supplement intake is water.Want to read more? Subscribe to one of our monthly plans to continue reading this article.