Today, I read an article about how smiling gives uis good effectfor us.

When people smile, they are relaxed.

This relaxation willcan lower the blood pressure, improve blood sugar levels in the blood, and affect, and positively on ourimpact mental health.

In the article, a doctor advises his patients to smile 15fifteen times anper hour.

I thought that smiling 15 times an hour is too much for noso often is too much if there is no good reason to laugh.

However, I'm convinced that smiling brings us good thingbenefits.

Today, I read an article about how smiling gives us good effectsis beneficial for our health.

This relaxation willRelaxing lower thes blood pressure, improves blood sugar levels in the blood, and affect, and positively onaffects our mental health.

In the article, a doctor says he advises his patients to smile 15 times an hour.

However, I'm convinced that smiling brings uis good thingfor us.

Today, I read an article about how smiling gives uhas good effects on us.

I think this is more natural.

When people smile, they are relaxed.

This is subtle; however, I think you want to say "When people smile, they become relaxed." What you wrote originally implies moreso "If people are relaxed, then they smile." While that is true, I don't think it's want you want to say.

This relaxation will lower the blood pressure, improve blood sugar (levels in the blood, and affect), and positively onaffect our mental health.

I thought that smiling 15 times an hour is too much for no reason to laugis too much.

However, I' am convinced that smiling brings us good things.

Or: "that smiling benefits us."

I think "I am" instead of "I'm" provides good emphasis here.