Right, so. Three weeks! That’s how long I brushed my teeth with activated charcoal powder before anyone bothered telling me it was a bad idea. It was everywhere on my feed at the time, black paste, dramatic before-and-afters, comments full of people swearing by it, the whole thing. So I bought a tub. Every morning, over the sink, brushing my teeth with something that looked and tasted like ash. Genuinely like ash. I don’t know what I expected. My teeth did not get whiter. What I did notice, a few weeks in, was that they felt rougher. Not painful, just…
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