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"Think of it as adding a thickener to water, like you would a pie filling," Lucia says.

A common additive in many food products, it's used as a thickener, stabilizer and emulsifier in a host of various products, both edible and not, from plant-based milk and ice cream to toothpaste and medications.

Flavored yogurts often contain additives like thickeners, non-caloric sweeteners or flavors.

This is why it's important to blend the starch or thickener with either water or fat prior to adding to the cooking gravy.

Soon, the "Alfredo sauce" was sold as a jarred monstrosity of fillers, preservatives, thickeners, additives and who knows what else.