by Mila McManus, MD

Fructose, especially high fructose corn sugar (HFCS), has earned its title as the most harmful sugar, causing a plethora of health problems.  All sugars can be harmful, especially when eaten in excess. We always recommend reducing sugar intake as much as possible and limiting choices to real whole food, such as fresh fruit. 

The negative effects of high fructose sugar intake include:

• Fatty liver
• High Triglycerides
• Weight Gain
• Leptin Resistance
• Increased gut permeability, or leaky gut
• Hunger and sugar cravings
• Increases uric acid, which contributes to Cardiovascular Disease, cognitive decline, and kidney stones, to name a few
• Is more addictive than cocaine
• Causes insulin resistance

Fructose is a simple sugar found in fruit, vegetables, and some natural sweeteners. High fructose corn sugar [HFCS] is a manufactured sweetening additive derived from corn, a heavily subsidized [think cheap] crop. Over the last 50 years, HFCS use by the food industry has increased considerably worldwide. Other names are corn syrup, glucose-fructose syrup, isoglucose, or crystalline fructose. It is used to sweeten ultra processed food and beverages. Manufacturers love HFCS because, compared to regular sugar, it is sweeter, cheaper, and produced in abundance.  However, it is a main culprit contributing to the dramatic rise in lifestyle diseases over the last several decades.

The body’s preferred source of fuel is glucose, the form of sugar we are “wired” to use. While fructose is a simple sugar, the liver must convert it to glucose.  Once converted, it is used for energy if the blood needs glucose, or it will be stored in the liver, or fat cells.  The process of converting fructose results in a waste product called uric acid, a key contributor to gout and heart disease.  A good analogy would be to say that glucose is a clean fuel and fructose is a dirty fuel that pollutes your body.

High fructose corn sugar is a combination of fructose and glucose made from corn starch. It is cheaper and sweeter than cane sugar. It is found in soft drinks, bread, juices, ice cream, canned fruit, canned soup, ketchup, sweetened dairy products, cakes, cereal bars, salad dressings, and many other manufactured foods. We recommend eliminating these foods for a multitude of health reasons, notwithstanding the ones listed above.

We also recommend avoiding corn syrup, honey, and agave nectar as they are predominantly fructose. It is best to limit fresh fruit to no more than 2-3 servings a day. Grapes, watermelon, jackfruit, and dried fruits are intensified forms of fructose, so best avoided or limited. Small fresh fruit is a better choice and offers natural fructose. Fructose in fruit isn’t what’s causing disease in most people. Naturally occurring fructose in fruit is part of a complex web of nutrients and fiber and does not exhibit the same biological effects as the high fructose found in corn sugar.  Along with the fructose in a piece of fruit you’re also getting fiber, hydration, vitamins, minerals, and other micronutrients your body needs.  Good choices include apples, apricots, berries, melon, citrus fruit, kiwi, cherries, pear, plum, and peach. A portion is about the size of a tennis ball, or ½ to 1 cup of fresh bite-sized pieces.

If you need help eliminating harmful fructose from your diet, our staff nutritionist is available to guide you to healthier choices that are best for your unique body and health status.

Eat Well, Be Well.

References:

Dr. David Perlmutter, author of Drop Acid: The Surprising New Science of Uric Acid

https://www.livestrong.com/article/34054-list-foods-high-fructose/

https://drhyman.com/blogs/content/manufactureres-downsized-high-fructose-corn-syrup-still-concerned?_pos=3&_sid=ebacdeac0&_ss=r