Hair and makeup trends have drastically changed over the last century, but so have our ideas about skin care. And it's a good thing because some of the beauty practices were actually pretty deadly. Here are some deadly beauty products you'll never have to deal with.

1. Galena Mesdemet: Used as eye cream by Egyptian women in about 4000 BCE, this product contained lead. And men took it further by rubbing lead all over their faces. Dr. Joel Schlessinger, a dermatologist, told NBC News, "The exposure would eventually lead to irritability, insomnia and mental decrease. The ocular skin is most likely to absorb materials due to its thin, nearly transparent qualities. Couple this with the mucous membranes being a hop, skip and a jump away from the area where cosmetics are applied and you have a potentially serious problem."

2. Lead Face Powder: Lead was still in vogue by 1000 BCE, as Grecians whitened their complexions with lead face powder. Some would use chalk.

3. Arsenic Face Powder: Aristocrats were the only ones to use makeup in the 1400 and 1500 AD, and they made the switch from lead face powder to the equally deadly arsenic face powder.

4. Lash Lure: This mascara contained paraphenylenediamine and permanently dyed people's eyelashes. In 1933, a Mrs. Brown used it and had stinging, burning eyes. The next day, her eyes had developed ulcers, and she could not open them. She eventually became blind, as did some other 15 women. One woman also died.

5. Koremlu Cream: This depilatory cream was made with thallium, which is used in rat poison. This was around in the same era as Lash Lure, when there was no FDA regulation.

But don't think we're much smarter than those that have come before us. We have used deadly (and gross) ingredients in our makeup products, too.