High fructose corn syrup

Few ingredient names carry as much freight as this one. “High fructose” sounds like a warning built into the word, and the regulation that defines it puts two specific numbers against that impression.

The numbers

The US definition describes high fructose corn syrup as “a sweet, nutritive saccharide mixture containing either approximately 42 or 55 percent fructose”, prepared from corn starch hydrolysate by partial enzymatic conversion.

Two grades. HFCS-42, used in baked goods and tinned fruit, and HFCS-55, used in soft drinks.

Sucrose, ordinary table sugar, is a molecule of glucose bonded to a molecule of fructose, so once digested it delivers 50 percent fructose.

So the two common versions of the frightening-sounding syrup sit at 42 and 55, on either side of the sugar it replaced. “High fructose” is high relative to plain corn syrup, which is nearly all glucose, and that is what the name was coined against. It was never a comparison with sugar.

What that does and does not settle

It settles the swap question. Replacing HFCS with cane sugar in a product changes the sweetener’s origin and its economics, and moves the fructose content by a few percentage points. Anyone hoping that swap converts a soft drink into something else is reading the name rather than the numbers.

It does not settle the quantity question. Added sugar in quantity is a genuine dietary matter, and this page is not the one that argues otherwise. The honest position is that the case is about how much, not about which syrup, and mistaking one for the other is how this ingredient became a mascot for a problem larger than itself.

That distinction, between an argument about a substance and an argument about an amount, is the one the hazard and exposure guide is built around.

The name on your label depends where you are

In Europe the same class of syrup is called glucose-fructose syrup, or fructose-glucose syrup when fructose predominates, and the regulatory term is isoglucose. In some markets it is made from wheat starch rather than corn.

That last point matters for one group of readers. Where the starch source is wheat, the same processing question arises that Maltodextrin raises, and the answer follows the same shape: the syrup is sugar rather than protein, and the gluten-free claim on a packet is the sentence with a measured threshold behind it. The wider habit is on the page for people avoiding gluten.

For parents

This is the ingredient most likely to be presented to a parent as a reason to reject a product, and it is worth having the proportion right.

A drink sweetened with HFCS and the same drink sweetened with cane sugar are, in terms of what reaches a child, close to the same drink. If the concern is added sugar, the useful number is on the nutrition panel rather than in the ingredient list, and it is the same number either way. The page for parents keeps that against the few label facts that genuinely carry weight, of which this is not one.