5 foods under 10 calories per 100 g
Under 10 kcal per 100 g, solid food appears — and all of it was made in a factory. Nothing grown gets here. The band below, under 5, is drinks only; this one is drinks plus five things built to be chewable at almost no energetic cost.
| Food | kcal per 100 g / 100 ml |
|---|---|
| Agar jelly (kanten), set with water | ~3 |
| Prepared stock or bouillon | ~4–8 |
| Shirataki noodles and konjac rice | ~6–9 |
| Sugar-free gelatin dessert, prepared | ~7 |
| Sugar-free ice pops | ~6–10 |
What they have in common
Four of the five are a gel. Konjac flour (glucomannan) and agar are soluble fibres that set water into a structure you can cut, boil and bite. The water is doing the work; the fibre just holds it in a shape. That is the only known way to make something with the mouthfeel of food at 7 kcal per 100 g.
Which means these are not low-calorie foods in the way a carrot is a low-calorie food. They are low-calorie carriers.
The substitution they are good at
Shirataki is the clear case. A 200 g portion of cooked pasta is 300–320 kcal; 200 g of shirataki is about 15. If what you actually wanted from the bowl was the sauce, that is a 280 kcal saving on an otherwise identical dinner.
If what you wanted was the pasta, it will not work. Shirataki is springy and faintly rubbery, it does not absorb sauce the way starch does, and it needs rinsing and dry-frying to lose its packing liquid. Most people who stay with it treat it as its own noodle rather than a replacement — or mix it half and half with real pasta, which still halves the number.
The same logic runs through the rest of the band. Sugar-free jelly and ice pops solve one narrow problem — wanting something sweet and cold at nine in the evening — for 10 to 30 kcal a piece instead of 200. Stock turns a bowl of vegetables into soup, which is the most filling format per calorie there is.
The packet trap
This band is where label reading actually matters, because the number on the front and the number you eat can differ by a factor of fifty.
Shirataki is sold wet, packed in water, so the pack weight is the eating weight — 200 g on the pack is 200 g on the plate. But konjac flour and dry agar are 300 kcal or more per 100 g before they absorb anything. Buy the powder and the per-100 g figure on the tub is not the figure for the jelly you make from it.
Sugar-free products have their own version of this. “Zero sugar” is a claim about sugar, not energy: sugar alcohols such as maltitol and sorbitol run 2 to 3 kcal per gram, so a product can be sugar-free and still carry real calories. How to read a food label covers the mechanics.
What they do not do
Glucomannan does delay gastric emptying, which is the honest basis for the “keeps you full” claim on the pack. But a serving holds two or three grams of fibre, which is less than a pear, and the effect is modest at that dose. Taken in quantity it causes bloating and gas in a fair number of people.
There is no protein here, no vitamins, nothing the body needs. A day built on this band would be a medical problem. Used as the base layer under something protein-dense — the noodles under the chicken, the jelly after the meal — it is a real tool and a narrow one.
And it does not create a deficit on its own. Swapping pasta for shirataki three times a week saves perhaps 900 kcal, which is useful and is not a plan. The size of the deficit still sets the rate.
The next rung up is where food starts growing out of the ground: under 20 kcal per 100 g.
The rest of the ladder
Under 5 · under 10 · under 20 · under 30 · under 50 · under 100 · under 200 · under 300 · under 400 · under 500
Figures are typical values from USDA FoodData Central and product labels, and vary by brand and preparation. General information, not medical advice.