FD&C Red 40, also known as Allura Red AC, is a synthetic dye commonly used in food, beverages, and cosmetics. It is one of the most widely used color additives in the United States and is approved by the Food and Drug Administration (FDA). This dye is derived from petroleum and is often found in products like candies, soft drinks, and baked goods. While FD&C Red 40 enhances the visual appeal of products, some studies suggest it may cause allergic reactions in sensitive individuals. However, regulatory agencies maintain that it is safe for consumption within established limits. Always check product labels for this additive if you have concerns.