Though the popularity of the body art rises, information surrounding it does not. Few realise that a form of henna, called "black henna," can poison us.
Some of the red lipsticks manufactured in the United States and used daily by millions of women contain high levels of lead, according to new product tests commissioned by the Campaign for Safe Cosmetics, a nonprofit coalition.
The tests for lead in lipstick were conducted by an independent laboratory over the month of September on red lipsticks bought in Boston, Hartford, Connecticut, San Francisco and Minneapolis.
Nanotechnology can be risky, but no one is regulating its use. A study published in the 20 May 2008 issue of Nature Nanotechnology showed that nanotubes, tube-shaped nanoparticles, can lead to cancer.