Healthy diets
Learning Center
Colon cancer screening: At what age can you stop?
Some groups recommend people over 75 may consider stopping colon cancer screening. Not everyone agrees. Learn about your colon cancer screening options.
Can vitamin D protect against coronavirus disease 2019 (COVID-19)?
Find out what the research says about links between this key vitamin and the widespread viral infection.
Calcium supplements: A risk factor for heart attack?
Learn about the possible link between calcium supplements and heart attacks.
COVID-19 variants: What's the concern?
The virus that causes COVID-19 has changed over time, which has affected prevention, diagnosis and treatment of COVID-19.
COVID-19 infections by race: What's behind the health disparities?
Understand how underlying health conditions, the places where people live and work, and racism can affect who becomes seriously ill with COVID-19.
COVID-19 drugs: Are there any that work?
Medicine can help people who are at risk of, diagnosed with, or have symptoms of COVID-19.
Butter vs. margarine: Which is better for my heart?
Margarine usually tops butter for heart health. But not all margarines are created equal.
Bacterial vs. viral infections: How do they differ?
Understand the differences between bacterial and viral infections.
Arcus senilis: A sign of high cholesterol?
With this condition, older adults develop a gray arc around the cornea of the eyes.
Alzheimer's prevention: Does it exist?
Alzheimer's prevention: Strategies for staying physically and mentally fit may be most effective.
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