These pastes get their name from their vibrant purple tint. “Purple toothpaste works by using purple dye to neutralize any yellowish stains or coloration on the teeth,” explains Rhonda Kalasho, DDS of ...

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Everyone can see themselves in science! Khadija is inspired by her visit to the science fair. There are so many different scientists all wearing safety goggles and lab coats! But how come none of them ...