High fructose corn syrup
HFCS · HFCS-55 · HFCS-42 · "corn sweetener"
An industrial sweetener made by enzymatically converting cornstarch into fructose and glucose. Cheaper than sugar, sweeter than sugar, and ubiquitous in American processed food since the 1980s.
Why we flag it
HFCS isn't chemically that different from table sugar — both are roughly half glucose and half fructose. The honest concern isn't that HFCS is uniquely poisonous; it's that HFCS made cheap sweetness possible at a scale that has remade the food supply. American per-capita added-sugar consumption roughly doubled in the decades after HFCS replaced cane sugar in soda and processed foods, and that excess is strongly associated with obesity, type 2 diabetes, fatty liver disease, and metabolic syndrome.
There's also some evidence that the unbound fructose in HFCS may be metabolized slightly differently than the fructose-glucose bond in sucrose — but the bigger story is dose. When HFCS is in your bread, ketchup, salad dressing, and yogurt, the cumulative load adds up fast.
Where you'll find it
Nearly any processed food product where sweetness or shelf-stability matters:
- Soda, sports drinks, sweetened iced tea, energy drinks
- Ketchup, barbecue sauce, salad dressings, marinades
- Breakfast cereals, granola bars, flavored oatmeal packets
- Packaged breads, hamburger buns, hot dog buns
- Yogurt with fruit-on-the-bottom, flavored milks
- Candy, cookies, snack cakes, packaged pastries
- Canned fruits in "light syrup," jams, jellies, ice cream toppings
What to look for instead
The cleanest answer is to eat fewer sweetened processed products overall — but when you do want sweetness, less-refined options carry more flavor and a bit more nutrition:
- Raw or local honey — minimally processed, distinctive flavor
- Pure maple syrup (not "pancake syrup," which is usually HFCS)
- Organic cane sugar or coconut sugar — still sugar, but less industrially processed
- Date paste, mashed banana, applesauce — whole-fruit sweetness for baking
- Stevia or monk fruit — zero-calorie plant sweeteners (if you want to cut sugar entirely)
The clearest label signal is the absence of corn syrup of any kind on the ingredient list, paired with USDA Organic certification — which prohibits HFCS outright.