The Hidden Sugar Problem
If you see "no added sugar" on a product's front label but the ingredient list shows corn syrup, you might think it's contradictory — but food companies have learned to use over 60 different names for sugar to avoid the word appearing too prominently. Common hidden sugar names:
- Dextrose, fructose, glucose, maltose, sucrose
- Corn syrup, high-fructose corn syrup, corn sweetener
- Cane juice, cane crystals, evaporated cane juice
- Barley malt, rice syrup, malt syrup
- Fruit juice concentrate (often as sweet as corn syrup)
- Agave nectar, coconut sugar, palm sugar (marketed as "natural" but metabolically similar)
The 2020 Nutrition Facts label now requires "added sugars" to be listed separately in grams, making this somewhat easier to track — but the ingredient list still hides the diversity of sources.
MSG Derivatives
Many consumers avoid monosodium glutamate (MSG) due to concerns about sensitivity. But manufacturers use a range of ingredients that contain or generate free glutamates during processing:
- Autolyzed yeast extract — contains free glutamic acid at levels similar to MSG
- Hydrolyzed vegetable protein (HVP) or hydrolyzed soy protein
- Yeast extract
- Torula yeast
- Textured protein
These don't have to be labeled as "contains MSG" even though they deliver similar amounts of free glutamate. People sensitive to MSG should look for all these terms.
Hidden Gluten Sources
For people with celiac disease or gluten sensitivity, the obvious sources (wheat, barley, rye) are easy to avoid. Less obvious:
- Modified food starch — can be wheat-derived unless labeled "modified cornstarch"
- Malt extract / malt flavoring — typically barley-derived
- Soy sauce — usually contains wheat; tamari is often gluten-free
- Dextrin — may be wheat-derived
- Caramel color — sometimes made from barley malt in Europe (typically corn in US)
Products labeled "gluten-free" in the US must contain less than 20 ppm gluten under FDA regulations — this is the safest designation to look for.
Carrageenan: The Controversial Thickener
Carrageenan is a seaweed-derived thickener used in dairy products, plant milks, deli meats, and infant formula. It's approved by the FDA as "generally recognized as safe," but some researchers argue that food-grade carrageenan may cause intestinal inflammation. The scientific evidence is contested — animal studies show potential issues, but human evidence is limited. People with inflammatory bowel conditions sometimes report symptom improvement when eliminating carrageenan.
TBHQ: The Petroleum-Derived Preservative
Tertiary butylhydroquinone (TBHQ) is an antioxidant preservative found in fast food items, packaged snacks, and cooking oils. It's derived from butane (a petroleum product). The FDA allows up to 0.02% of the oil content in foods. Animal studies at high doses show concerning effects, though the doses in food are much lower. It's banned in Japan and some other countries but legal in the US and EU.
"Natural Flavors": The Catch-All
"Natural flavors" is one of the most common ingredients on labels — and also one of the vaguest. Under FDA rules, natural flavors must be derived from a natural source (plants, animals, seafood, dairy), but can be extensively processed and may contain dozens of chemical compounds. This means:
- Vegans and vegetarians should note that "natural flavors" can include animal-derived compounds
- People with specific allergies should be aware that allergens can be present in natural flavors (though major allergens must be declared)
- The term tells you nothing about how much processing was involved
Artificial Colors and Behavioral Concerns
The FDA-approved artificial dyes (Red 40, Yellow 5, Yellow 6, Blue 1, Blue 2, Green 3, Red 3) are widely used in candies, cereals, beverages, and snacks. A 2007 UK study found that certain combinations of artificial dyes with sodium benzoate increased hyperactivity in children — leading the European Union to require warning labels on products containing them. The FDA reviewed the same evidence and concluded it did not show a causal link but allows individual families to make their own decisions.