Q: I just found some leftover sunscreen from last summer. Is it safe to use it again this year?

A: Check the expiration date on the label. Most sunscreens are good for a couple of years, even if stored at a relatively high temperature, as in a glove compartment or trunk.

Q: In a recent answer to a laxative addict, you suggested psyllium (Fiberall, Metamucil, Perdiem Fiber, etc.) as an approach to easing constipation. But you left out a patient-friendly solution.

When you mention Metamucil, most people automatically think of an unpalatable powder mixed with water. But Metamucil also makes wafers that are outstanding. I don’t take them for constipation, because I’ve never had that problem.

I eat them on the instructions of the doctor who gave me a colonoscopy. They’re delicious (apple-crisp and cinnamon flavors), and I think people would happily get more fiber in their diets if they knew about the wafers.

A: Thanks for the tip. Metamucil wafers contain as much psyllium as an ordinary dose of psyllium powder. This fiber is effective against constipation and helps control cholesterol.