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Fasting vs. calorie restriction for weight loss: Which one wins?

A randomized controlled trial published in 2025 found that people who followed a 4:3 intermittent fasting plan for one year, eating only 20% of their usual calories on three fasting days per week, lost more weight than people who were on a calorie-restricted diet.

Harvard and CDC study: Serious side effects from semaglutide are uncommon

In a 2025 study, researchers estimated that fewer than four emergency department visits attributed to semaglutide (Ozempic, Wegovy) occurred for every 1,000 patients taking the drug in 2022 and 2023. Most of the visits were related to gastrointestinal problems.

Do you know about these summer breathing hazards?

In the summertime, one of the chief contributors to symptom flares of lung problems is hot air, especially if it's also humid, stagnant, or very dry. Such weather might narrow the airways, making it much harder to breathe normally. This might occur because hot air irritates the nerves, widens blood vessels near the lungs, or causes people to breathe faster. To avoid breathing difficulty, doctors advise people with lung disease to follow strategies such as keeping their inhalers handy and staying in air-conditioned spaces.

Is wooziness a serious warning sign?

Wooziness is often just a passing episode of lightheadedness. But it might signal something very serious, such as a stroke or heart attack. When wooziness occurs, one should sit or lie down for a few minutes, rest, and have a drink of water or juice. If wooziness eases, it's best to report the episode to your doctor. If lightheadedness hasn't improved or if it's accompanied by other symptoms, such as chest pain, trouble speaking, or weakness or numbness on one side of the body, call 911 immediately.

Wildfires: How to cope when smoke affects air quality and health

Wildfire smoke contributes greatly to poor air quality, and as wildfires become more frequent due to climate change and drier conditions, more of us and more of our communities are at risk for health harms. Here are ways to cope.

Do collagen supplements fulfill their promises?

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.

Heat wave hazards

Certain medications can leave people more vulnerable to heat-related effects or the sun's rays. The medications can raise the risk of dehydration, make people sweat too much or too little, impair the body's ability to regulate temperature, or raise the risk of getting a bad sunburn. In addition, higher temperatures may damage some medicines, including diuretics, blood pressure drugs, some antidepressants, thyroid replacement hormones, and some over-the-counter antihistamines.

Substituting plant oils for butter can lead to better health

People who consume plant-based oil instead of butter may have a lower risk of death from cancer and cardiovascular disease, according to a 2025 study. These oils have more heart-healthy unsaturated fats, which help lower cholesterol levels and chronic inflammation.

Morning blue light therapy may offer many benefits for older adults

Daily morning exposure to blue-enriched light can improve sleep quality and increase activity levels in older adults, according to a 2025 study. Researchers believe morning blue light "wakes up" the brain, which increases alertness and synchronizes the sleep-wake cycle.

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