Bayer Healthcare, Morristown, NJ, has introduced its One-A-Day CarbSmart multivitamin to help assist low-carb lifestyles. One-A-Day CarbSmart contains an array of essential vitamins and minerals that may be lacking in a low-carb diet, including biotin, which the company says is a key nutrient that helps break down the fats and proteins ingested into the energy the body needs. In addition to biotin, One-A-Day Carb­Smart contains beta-carotene, vitamins C, E, thiamin, riboflavin, niacin, B6, B12, pantothenic acid, zinc and selenium.