5 Common Misconceptions About Low-GI Foods

Low-GI foods are becoming a hot label in the health food market. From supermarket shelves to e-commerce platforms, staples, snacks, dairy products, and many other categories now carry “low-GI” claims. But consumer understanding of this concept is far from clear.

A 2026 survey by the Shanghai Consumer Council found that while 89.5% of consumers had heard of low-GI, only 13.8% could accurately explain what it means.Over 40% of respondents held significant misconceptions.The five most common ones are listed below.

Misconception 1: Low-GI foods are low-calorie foods

This is the most widespread misunderstanding. 43.5% of consumers believe low-GI foods are relatively low in calories and can be eaten in larger amounts during weight loss or blood sugar management.But the GI value measures how quickly carbohydrates raise blood sugar — it has nothing to do with calorie content. Some low-GI foods may achieve their low GI by adding fat, which does not make them low in calories.

Misconception 2: Low-GI foods can be eaten freely without raising blood sugar

Low-GI does not mean “zero glycemic response.” Low-GI foods simply raise blood sugar more slowly — they do not stop it from rising. Eat too much, and your blood sugar will still go up.A researcher from the Chinese CDC noted that a lower GI is not always better, and blood sugar management cannot rely on GI alone.

Misconception 3: Low-GI foods are sugar-free foods

Sugar-free and low-sugar foods are evaluated based on simple sugar content (glucose, fructose, lactose, maltose, sucrose). GI evaluates the “quality” of carbohydrates.A sugar-free cookie made with white flour can have a high GI, while a bowl of low-GI rice can keep your blood sugar much steadier.

Misconception 4: Low-GI labeled foods are always healthier than regular foods

51.8% of consumers hold this belief.But low-GI only indicates a slower glycemic response — it does not reflect a food’s overall nutritional profile. Some low-GI foods may be high in fat or contain numerous additives.Always check the full ingredient list and nutrition facts panel.

Misconception 5: All products with a “low-GI” label are reliable

Currently, many “low-GI” claims on the market are not backed by authoritative certification.Only 10.4% of consumers check for low-GI certification.When shopping, look for products that have been human-tested and certified by a CNCA-authorized body.