In a simpler time, we were told to avoid foods that were high in fat. But then we learned that there are many different types of fats, including some, like olive oil, that are good for you.n a simpler time, we were told to avoid foods that were high in fat. But then we learned that there are many different types of fats, including some, like olive oil, that are good for you.
1 One out of every 10 people entering a hospital needs blood. 2  Just one pint of donated blood can help save as many as three people's lives. 3  The average adult has 10 pints of blood in his or her body.
About 1 pint (480 mL) of blood is taken when you donate. It takes about 10 minutes. The whole process-including answering questions and having a short exam-takes up to an hour. Donated blood is tested to make sure that it is safe to use.