Hair testing is intrinsically sensitive to hair phenotype and analyte chemistry, and cosmetic damage can increase ...

Add Yahoo as a preferred source to see more of our stories on Google. The trucking industry’s decade-long push for hair follicle drug testing is reaching a critical inflection point as the Trump ...

If you're on haircare TikTok, there's a good chance you've heard of head spas. Popular in Japan, these relaxing treatments not only involve massaging and cleaning your scalp, but can also involve a ...

When Consumer Reports published findings from tests conducted on several synthetic braiding hair products in 2025, we detected heavy metals like lead in 90 percent and volatile organic compounds (VOCs ...