A photo of a long‑expired tube of toothpaste—dating all the way back to 1988—has gone viral on Reddit, attracting more than ...

"Hydroxyapatite is natural. It is a type of calcium that makes up bones and teeth," says Lai. "Nano-hydroxyapatite relates to ...

Quip's whitening strips are a dissolvable, peroxide-free option that brighten teeth fast. Even better, after giving myself the full treatment, I didn't feel any sensitivity.

For committed relationships to survive, people need to negotiate responsibilities. From big, life-shaping decisions to ...