If I am taking vitamin A, what is a reasonable dose? I have seen reports that taking too much can cause liver damage, but ...

Dear E.G.: It sounds like what you are doing is working since you haven't developed diabetes. However, I can't make any ...

Dear W.D.W.: It is completely understandable to be concerned about a PSA level of 18 ng/mL, but you and your urologist have, ...

Dear Dr. Roach: How effective are COVID vaccines for people taking immunosuppressive prescriptions? Will we be tested for a desired level of antibodies? — C.J.

Dr. Roach: I was vaccinated as a child with the combination MMR vaccine. My husband and I are expecting a new grandchild. My friend advised me that we, as elder ...

I just found out that I have a kidney stone. I’m 77 years old, and I don’t want to deal with it. I’ve heard of potassium citrate and pulverizing it with sound waves. Are these options?

Dear Dr. Roach: Seniors are advised that one of the best forms of exercise is walking. The advice is to “walk briskly” for at least 150 minutes per week. There are those of us who, because of ...