Life Extension's Two-Per-Day is a high potency multi-vitamin and mineral supplement that contains nicotinamide riboside. Naturally found in milk, nicotinamide riboside has been shown in studies to support mitochondrial health and promote pathways of longevity.* Two-Per-Day Tablets provide Crominex, a highly stable and biologically active form of chromium blended with Capros Amla and PrimaVie Shilajit. When used as part of a healthy diet, chromium plays a vital role in maintaining healthy blood sugar levels in those within normal range. Two-Per-Day Tablets additionally contain alpha-lipoic acid, the universal antioxidant that helps boost glutathione levels already in normal range.* Life Extension's Two-Per-Day formula contains the form of vitamin D known as cholecalciferol (vitamin D3). It also contains bioactive forms of vitamin B2, vitamin B6 and folate, zinc citrate and natural mixed tocopherols. Each Life Extension Two-Per-Day Tablet is shaped as a moderate-sized tablet for ease of swallowing.