Use the word "health" when describing the mental or physical condition of a person.
How’s your health?
Are you in good health?
My friend, Oscar, is not in good health.
He’s in bad health.
We’re worried about his health.
Smoking is bad for your health.
Eating a lot of fruit and vegetables is good for your health.
Pay attention to your health.
Daily exercise will help you maintain your health.
Lifting weights is good for your health, but try not to do overdo it.
The word "healthy" is an adjective. You can use "healthy" to describe a person or a thing:
Regina has a healthy diet.
She likes to eat healthy food.
She’s a very healthy person.
Healthy people usually live longer than people who are unhealthy. (unhealthy = not healthy)
Mario is trying to get down to a healthy weight.
Going to the doctor regularly for a checkup is an important part of staying healthy.
Note: The words "health" and "healthy" contain an unvoiced "th" consonant sound. Some students have difficulty with this sound. Place your tongue just behind your top front teeth and blow air. That’s how to make this sound.
More more help with the unvoiced "th" sound, click here.