Nutrition basics
Learning Center
How to take your pulse
Learn two ways to take an accurate pulse, or heart rate.
How to measure your respiratory rate
Learn how to accurately measure your breathing rate, which is also known as your respiratory rate.
Herd immunity and COVID-19: What you need to know
To protect groups of people over time, it helps to know what level of recovery or vaccination in a population makes it hard for a germ to spread.
Heart-healthy diet: 8 steps to prevent heart disease
Certain foods can raise your risk of heart conditions. Learn eight ways to get started on a diet that's good for your heart.
Healthy sperm: Improving your fertility
You can take simple steps to have healthy sperm and improve your fertility.
Healthy meals start with planning
It's easy to put healthy meals on the table with a little planning. This guide will show you how to create balanced meals with proper portion sizes.
Headaches: Reduce stress to prevent the pain
Headaches seem worse when you're under stress — and stress by itself can trigger headaches.
Hand-washing: Do's and don'ts
Done properly, hand-washing is a simple way to prevent the spread of germs and avoid getting sick.
HDL cholesterol: How to boost your 'good' cholesterol
Generally, people who have naturally higher levels of HDL cholesterol are at lower risk of heart attack and stroke.
Guide to different tick species and the diseases they carry
Learn about different tick species and some of the diseases they may carry.
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