Red 40 is a synthetic food dye commonly used to add color to various food products, beverages, and cosmetics. It is derived from petroleum and is known for its bright red hue. This dye is often found in candies, soft drinks, and processed foods, making it a popular choice for manufacturers looking to enhance visual appeal. The use of Red 40 has raised some health concerns, as some studies suggest it may cause allergic reactions in sensitive individuals. However, regulatory agencies like the U.S. Food and Drug Administration (FDA) have deemed it safe for consumption within established limits.