Olestra

Olestra was one of the more notable attempts by the food industry to solve a specific problem: how to give people the taste and texture of fried, fatty snack foods without the calories or fat that normally come with them.

The substance works by passing through the digestive system largely unabsorbed, which means it doesn’t contribute the calories that a normal fat would. That property made it attractive for snack foods like chips, where fat plays a big role in flavor and texture, but it also came with a well-documented downside: because it isn’t absorbed, it can interfere with the body’s absorption of certain fat-soluble vitamins and, for some people, cause digestive discomfort.

The broader lesson from products like this has stuck around longer than the ingredient itself: a “fat-free” or “low-fat” label doesn’t automatically mean a food is healthy. Fat substitutes and low-fat reformulations sometimes introduce their own tradeoffs, whether that’s added sugar, extra sodium, or, in olestra’s case, digestive side effects and interference with nutrient absorption.

Reading full ingredient and nutrition labels, rather than trusting a single headline claim on the front of a package, remains one of the more reliable ways to evaluate whether a “healthier” version of a food actually is.

NEMA continues to encourage a food-first, whole-ingredient approach to nutrition rather than relying on engineered substitutes to solve what are often better addressed through overall diet quality.