If you’ve been in the market for a new hair dryer, you’ve likely seen advertising for ionic ones. Some claim to produce negative ions in the millions, with or without the help of added minerals like tourmaline.

The broader claim is usually that these ions break water molecules into micro-droplets, resulting in faster drying and reducing frizz to give you super smooth, shiny-looking hair.

Are ionic hairdryers actually capable of doing what they claim? To understand this, we need to briefly delve into some fundamentals.

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