Sleep Archive

Earwax should be removed only if it causes problems with hearing, ringing in the ears, or an earache. To unblock the wax, people can use an over-the-counter ear-cleaning treatment to flush it out. If this is not successful, see your 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.

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.

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.

Body mass index (BMI) uses weight and height to calculate whether a person is overweight or obese. However, it cannot determine the amount of visceral fat that lies deep inside the body. Two better methods are measuring waist size and determining waist-to-hip ratio.

Studies have shown that both coffee and tea drinkers may experience health benefits compared to people who don't consume these beverages. Experts point to the high amounts of caffeine and inflammation-fighting polyphenols in these drinks as possible reasons.

Ice baths typically happen in water that's between 50° and 60° F. Studies about their health benefits are inconclusive, but ice baths can be risky. People should never take an ice bath without someone nearby, and stay in for a maximum of 15 minutes.

A sleep study is performed to detect sleep apnea or other sleep disorders. It often takes place in a special lab. The person is hooked up to equipment that records the brain's activity and monitors snoring, blood oxygen levels, and other variables.

There are no health benefits to taking a daily calcium supplement in addition to the amount of calcium a person gets from a regular well-balanced diet. Too much calcium from supplements can lead to problems, like a higher risk of kidney stones and poor absorption of micronutrients.