Ask the Doctor

A 2025 study found that the shingles vaccine reduced the risk of developing dementia by 20%. The study supports (but doesn't absolutely prove) the theory that infections may be one cause of Alzheimer's disease and possibly other forms of dementia.

People with very high calcium scores (over 1,000) have a risk of heart attack or stroke similar to those who have already had a heart attack. They should take cholesterol-lowering drugs to bring down LDL levels and possibly undergo additional testing.

Measles have made a comeback, with outbreaks in many states. The infection is extremely contagious and can be deadly. Most people getting measles were not vaccinated against it. Adults should get the vaccine if they were born after 1957 and didn't receive two doses. They should get a booster shot if they received the vaccine between 1963 and 1968, when the vaccine used was not as strong as the one that's been given since 1968.

The protein collagen supports skin, hair, nail, bone, joint, and muscle health. As people age, natural collagen production drops. Some early research suggests collagen supplements offer benefits, but people should ask their doctor about the pros and cons.

Typical insect bites produce redness, itching, swelling, and pain. Signs of a more severe bug bite include hives, nausea, vomiting, fever, chills, drainage, rashes, blisters, numbness, or skin discoloration. People with any of these bug bite symptoms should see a doctor.

Taking a daily multivitamin helps fill in nutritional gaps and some studies have found a link to better cognitive fitness. Adding a vitamin D supplement may help maintain bone health and a B₁₂ supplement is suitable for people who might have difficulty getting this vitamin from food.

Smart watches can monitor different parameters simply by measuring a person's pulse and body movements. Potentially helpful features include those to detect very low or high heart rates, irregular heart rhythms, and breathing disruptions during sleep.

Substituting potassium-containing salt substitutes for regular salt can help lower blood pressure as well as the risk of stroke. But people should also check the sodium content in foods and eat more potassium-rich produce.

A 2025 study addressed the role of genes versus lifestyle habits and life circumstances in influencing a person's health. Researchers found that genes seemed to have a stronger influence than lifestyle and life circumstances for some diseases, including dementia, macular degeneration, and certain cancers. For other diseases, such as atherosclerosis involving arteries of the heart and brain, rheumatoid arthritis, and diseases of the lung, heart, and liver, lifestyle and life circumstances had a stronger influence than genes.

Wearing nail polish does not harm nails. However, doing so for long periods can dry out the surface, prompting chalky, white patches to form. Removing nail polish with acetone-based products can also dry out the nails and surrounding skin.