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A foam roller is a cylinder made of foam. When the tool is used properly, it can help reduce tension in muscles and other soft tissue. Foam rolling also helps increase flexibility, especially when used as a warm-up before exercise.
Experts define a low-carb snack as one with 5 grams of carbohydrates or less per serving. The Academy of Nutrition and Dietetics recommends snacks that are fresh, balanced, and packed with nutrients like protein and fiber.
Malaise is a feeling of weakness, fatigue, or being generally unwell. Addressing underlying causes and making healthy lifestyle changes — such as exercising regularly, eating a healthy diet, and getting enough sleep — can help people with malaise feel better.
The editorial team at Harvard Health Publishing welcomes 2026 by thanking readers for their support and highlighting its efforts to expand the voices of the Harvard Medical School faculty who contribute each month.
Many activities, such as reading small print or doing needlework, contribute to eye strain. To avoid or reduce eye strain, it helps to keep eye surfaces moist and take breaks when doing anything that requires focused close-up vision.
Synthetic dehydroepiandrosterone (DHEA) is available in various forms, including tablets, capsules, powders, creams, and gels. The supplement is marketed for “fountain of youth” effects, but evidence about its actual effects is mixed.
A hemoglobin HbA1c test is standard for anyone at risk for diabetes or anyone with diabetes. The HbA1c is a blood test that shows a person’s average blood sugar levels over a three-month period.
The editorial team at Harvard Health Publishing welcomes 2026 by thanking readers for their support and highlighting its efforts to expand the voices of the Harvard Medical School faculty who contribute each month.
Gingivitis occurs when sticky plaque and hard tartar form at and below the gums. Brushing and flossing teeth, plus getting regular cleanings at the dentist’s office, can help reverse and prevent gingivitis.
A power nap lasts anywhere from 10 to 30 minutes. The shut-eye can effectively increase alertness and focus, enhance mood, reduce fatigue, and possibly support work performance.