If food is medicine, many Americans are in dire need of a new prescription, according to experts.
Adults who stick to a healthy diet are much less likely to experience obesity, heart disease, diabetes and even some types of cancer, says the Centers for Disease Control and Prevention (CDC) — yet most Americans aren’t getting the nutrition they need.
Worse still, they’re eating excessive amounts of the wrong things.
“Nutrition is thought to dictate about 80% of one’s health, and obesity irrefutably shaves nearly 10 years off a person’s life,” said Dr. Brett Osborn, a board-certified neurosurgeon in West Palm Beach, Florida, and author of “Get Serious, A Neurosurgeon’s Guide to Optimal Health and Fitness.”
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“You can extend your ‘health span’ — or the time that you remain fully functional and free of disease — by simply following some basic nutritional principles,” he said.

Dr. Brett Osborn, founder of a preventative health care and anti-aging facility, Senolytix, shared the 10 most critical nutrition mistakes people are making. (Brett Osborn/iStock)
Osborn, who is also the founder of a preventative health care and anti-aging facility, Senolytix, shared with Fox News Digital the 10 most critical nutrition mistakes people are making — and what they should be doing instead.
Mistake No. 1: Consuming excessive sugars
Osborn described excess sugar consumption as “the root of all evil.”
“Sugar, by definition, is a high glycemic index carbohydrate, meaning that once it enters the gut, it immediately crosses the bowel lining and enters the bloodstream, causing a rapid rise in blood sugar,” he said.
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“In response, the pancreas secretes insulin, and the sugar (i.e., glucose) is shuttled into the cells for use as energy.”
But there’s a problem, Osborn said: The sugar molecules are released into the bloodstream so quickly that they damage the arterial walls — which causes inflammation.
“The next thing you know, there is a large plaque within a major artery of the heart, and you’re one step closer to your first heart attack,” he warned.

Osborn described excess sugar consumption as “the root of all evil.” (iStock)
“To add insult to injury, eating simple carbohydrates shuts off fat burning by spiking insulin levels, and at the same time turns on fat production,” he said.
Osborn recommended limiting simple carbs like bread, pasta, rice, candy or other things that taste sweet.
“They train your body to burn sugar, and all excess is stored as fat,” he said. “This further stokes inflammation and places you on the accelerated train of aging.”
“You can extend your ‘health span’ – or the time that you remain fully functional and free of disease — by simply following some basic nutritional principles.”
The experts at Osborn’s Florida clinic recommend consuming only carbohydrates with a glycemic index of 40 or less.
The glycemic index (GI) is a rating system for