Grecian Formula is a mens hair coloring product that gradually replaces gray hair with a natural-looking hair color. It contains hair thickening agents that repair and strengthen, reducing hair loss from breakage. The product uses a melanin-like substance that works as a protein that hair is missing to revert hair back to its original color. The ingredients of Grecian Formula include water, isopropyl alcohol, triethanolamine, bismuth citrate, sodium thiosulfate, fragrance, and panthenol. Until 2018, the formulation used in the United States contained lead(II) acetate, which was banned in cosmetics in Canada and the European Union. In 2017, the Environmental Defense Fund and other consumer groups filed a complaint with the Food and Drug Administration to force the removal of lead acetate from Grecian Formula and other hair dyes. As of July 2018, the formulations sold in Canada and the European Union do not contain lead acetate. There have been concerns about the safety of lead acetate, but the FDA considers lead acetate dyes safe as long as they are used correctly. It is important to read the instructions before using the product.