To make your diet more healthy, Dr. Oz says to remember his "rule of fives." Look at the labels of the foods you eat. If you see one of these five ingredients listed as one of the first five things used to make it, don't eat it.

High fructose corn syrup
"We most commonly get this in soft drinks," Dr. Oz says. "It's an inexpensive sugar, which means we're getting a lot of it in our diet."

Sugar
Dr. Oz says when you eat sweets, your brain receives schizophrenic messages. "It says: 'I got calories, but I didn't get any nutrients,'" he says. Your body will keep craving food until it gets those nutrients.

"Enriched"
Also watch out for products made with "enriched" flour, like white bread. "Why would they take bread and have to enrich it? Because they take all the important vitamins out of it, and they sprinkle just a little bit back in there," Dr. Oz says.

Trans fat
Also known as hydrogenated fat, these are fats that were once in liquid form but have hydrogen added to make them solid at room temperature. "It extends the shelf life of the product," Dr. Oz says. "But it shortens the human life."

Saturated fats
These fats come from four-legged animals like pigs and cows.