Hydroxyapatite (HAP) toothpaste is a dental product that contains manufactured calcium phosphate. Calcium and phosphate are minerals that form 95% of tooth enamel and 70% of bones. NASA developed HAP ...
A photo of a long‑expired tube of toothpaste—dating all the way back to 1988—has gone viral on Reddit, attracting more than 50,000 upvotes. The reason? As the caption puts it: “Mom is using toothpaste ...
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