Bismuth is safe for human consumption and exposure. In fact, it’s a common ingredient in many medications, including Pepto-Bismol. However, bismuth can be toxic if consumed in very high doses. In addition, some people may be allergic to bismuth and experience skin irritation or other reactions when they come into contact with the metal. It’s also important to note that the bismuth used in industry and manufacturing is often contaminated with other metals, such as lead and mercury. So, while pure bismuth is safe, exposure to certain forms of bismuth may be harmful.