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Dear Dr. Roach: Decades ago, I served in the Marines and was wounded in action in the Korean War.

Have I been missing a vital remedy to maintain a healthy heart? I wondered if that was the case when I read an article in LifeExtension titled, The 30-Day Heart Tune-Up. The author, Dr.

Dear Dr. Roach: You have mentioned diseases of the blood marrow in the column before, but what does the bone marrow actually do? T.S.B.

Dear Dr. Roach: My husband, age 67, recently was diagnosed with atrial fibrillation. He began feeling very weak, and got dizzy every time he stood. We both had started on the keto diet together about a week prior. I’m a registered nurse.

Man, 91, switches doctors, is ordered to get treatment

Dear Dr. Roach: I am 88 and have had osteoarthritis in my hands and knees since I was in my 50s. I began taking Tylenol and Advil for pain. But on a recommendation from a health food store clerk, I started taking turmeric.

Dear Dr. Roach: What is your take on the benefits versus risks of DMSO? W.R.

Every year, more than 300,000 North Americans have a stent implanted to increase the flow of blood to heart’s muscle. Stents have been inserted for decades because of cardiologists’ concern that, without a stent, a heart attack might occur.

Dear Dr. Roach: Several years ago, I attended a presentation about insomnia. A registered nurse discussed how, in her career at a nursing home, she had many residents with insomnia. She said she had amazing success with these residents.

Dear Dr. Roach: If I take Viagra on an empty stomach, eat dinner one hour later, then have sex 45 minutes after that, will Viagra work very effectively in this situation? Anon.