Once enamel is gone, it doesn't grow back. This leads to sensitivity and yellowing (as the underlying dentin shows through).
Charcoal can settle into cracks or around fillings, leaving dark gray lines. What to Look for When Shopping buy activated charcoal for teeth
Charcoal is naturally gritty. If used too often, it can wear down tooth enamel. Once enamel is gone, it doesn't grow back
Look for "ultra-fine" powders to minimize physical scratching. Once enamel is gone
If you tell me your or specific dental concerns (like sensitive teeth), I can recommend some top-rated products or safer whitening alternatives .
Use a soft-bristled brush and very light pressure.