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Hair products make unusually ambitious promises for things sold in such small bottles.
A serum can claim smoother strands in seconds. A straightening treatment can transform texture for months. Then the interesting questions begin: what is the product actually doing to the hair fiber, what changes only until the next wash, and what happens when heat, chemistry, or repeated use enters the picture?
Hair follows those questions through research, regulation, formulation, and the market itself. New ingredients matter here, but so do old ones that regulators are still arguing about.
4 stories
The FDA originally planned to propose a ban on formaldehyde in certain hair straighteners in October 2023. Three years later, the proposed rule remains…
Static electricity develops when contact and friction transfer electrical charge between different materials. Hair strands with the same type of charge repel one another,…
Hair serums had an exceptional first half of 2026. American shoppers spent considerably more on specialized hair treatments, particularly products marketed for improved hair…
Hair straightening treatments can release formaldehyde as soon as a stylist passes a hot flat iron over treated hair. The gas enters the salon…
