Sensitivity

Burning, gagging, cold shocks — and the ingredients behind them.

Mint & burning

Why toothpaste stings, foams and makes people gag.

Close-up of a bamboo toothbrush with toothpaste in a minimalist setting.

Your Toothpaste Isn't Spicy. It's the SLS.

If brushing feels like chili pepper, there's a specific ingredient behind it — and it isn't the flavor. Here's what people found when they went looking.