The No. 1 cause of premature aging is sun exposure.

And infectious diseases remain the No. 1 cause of death in many countries.

Sun damage is the No. 1 cause of premature aging.

Car crashes are the No. 1 cause of death and injury to children.

Heart disease is the No. 1 cause of death associated with hypertension.

It is the No. 1 preventable cause of death and disease in America.

Active smoking is the No. 1 cause of preventable death in our country.

The No. 1 cause of premature aging and sunspots is sun damage.

They have become a primary treatment for this country's No. 1 cause of death.

I'm here to tell you that reckless driving is the No. 1 cause of teenage deaths.