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What Makes a Soup Low Glycemic?

Soup is one of the easiest low glycemic meals to get right — and one of the easiest to get wrong. The formula, and the three things to watch.

By Jen
"We really like soups, do you have any ideas in this area?"

Soup is close to ideal for this way of eating, and it's the most forgiving format there is. It's also easy to accidentally build one that's mostly starch.

The formula

Every good low glycemic soup has the same four parts:

A protein. Chicken, beans, lentils, fish, meat, or a large handful of red lentils stirred in to thicken and add protein at once.

Non-starchy vegetables in volume. Onion, celery, carrot, greens, zucchini, cabbage, peppers, mushrooms, tomatoes.

A fat. Olive oil to start, or cream or coconut milk to finish.

Optionally, a modest starch. A little barley, a few small potatoes, a half-cup of beans beyond the protein portion.

Get those proportions right and the soup takes care of itself.

The three things that go wrong

Potato as the body of the soup. Blended potato soups are essentially puréed starch with the structure removed twice — once by cooking, once by blending. Keep potato as an ingredient rather than the base.

Bread on the side. The soup is often fine; the two slices are what change the meal. If you want bread, make it dense and seeded, and one slice.

Shop-bought soups with added sugar. Read the label on tomato soups particularly. Many contain more sugar than you'd guess.

Three that work well

Lentil and vegetable. Lentils around 32 on the index, plenty of fiber and protein in one pot. Probably the single best soup for this.

Chicken and vegetable. Protein-led, endlessly adaptable, freezes well.

Minestrone with beans and no pasta — or with a small amount of wholewheat pasta rather than a full portion.

Why soup suits this way of eating

It's naturally protein-and-vegetable led. It's genuinely easy — most soups are one pot and little skill. It freezes, which solves the weekday problem. And it's the format most likely to survive a household where people want different things, because everyone can add their own bread or rice at the table.

Try this week: make one lentil and vegetable soup and freeze half. That's two meals sorted with one pot.

Education, not medical advice.

Sources

  1. Atkinson FS, et al. International tables of glycemic index and glycemic load values 2021. *Am J Clin Nutr* 2021;114(5):1625–1632 View source

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