Asparagus
Vegetables · Other Vegetables
Asparagus is one of the tightest vegetables on the list. One spear, about 15 g, rates green with 0.05 g of fructans and 0.03 g of excess fructose. Five spears, 75 g, is already rated red: the same two groups climb together to 0.25 g of fructans and 0.15 g of fructose. A normal side of asparagus is a high FODMAP serve.
Last updated 3 September 2026Serving sizes for asparagus
One spear (15 g) is rated green. Five spears (75 g) is rated red.
Tested serving sizes
| Serving | Amount | Main FODMAP | Rating |
|---|---|---|---|
| 1 spear | 15 g | Fructans 0.05 g | |
| 5 spears | 75 g | Fructans 0.25 g |
Breakdown for 1 spear
Is asparagus low FODMAP?
Asparagus carries two FODMAP groups at once, and both scale straight up with the portion. At one spear (15 g) there is 0.05 g of fructans and 0.03 g of excess fructose, with lactose, GOS, sorbitol and mannitol at zero. At five spears (75 g) the fructans reach 0.25 g, well past the 0.1 g mark where a group starts to count, and the excess fructose reaches 0.15 g. Neither figure is dramatic alone. It is the two arriving together in an ordinary side serve that puts 75 g in the red.
Asparagus and IBS: what to know
Fructans and excess fructose are handled by different mechanisms, so tolerating one does not mean you tolerate the other, and asparagus asks your gut to deal with both in the same mouthful. Fructans are water-soluble, so boiling leaves some behind in the water, but they are heat-stable: grilling, roasting or steaming does not break them down, and spears rate the same cooked as raw at the same weight. Portion is the only lever that actually moves the rating, and at 15 g that lever is a garnish rather than a side.
Gut-friendly ways to eat asparagus
When a recipe calls for a bunch of asparagus, swap it rather than shrink it. Green beans are the closest match for a steamed or blanched side, broccolini keeps the long-stemmed look on a grill plate, and zucchini cut into batons roasts beautifully with only 0.04 g of fructans in its tested 65 g serve. If you want asparagus in the dish itself, slice one spear thinly through a larger plate of something green, and keep the rest of that meal clear of other fructan sources.
Frequently asked questions
Is asparagus high FODMAP?
At any normal serve, yes. Five spears, 75 g, is rated red, carrying 0.25 g of fructans and 0.15 g of excess fructose. Only a single spear, 15 g, rates green. Since a side of asparagus is usually four or five spears, it is a vegetable to leave out during elimination rather than one to portion carefully.
How much asparagus can I eat on a low FODMAP diet?
The data covers two points: one spear (15 g) rates green and five spears (75 g) rates red. One spear is the only serve you can lean on, and it is a garnish rather than a side. Amounts in between are not tested here, so if you are reintroducing asparagus, try it on its own and start small.
Does cooking asparagus make it low FODMAP?
No. Fructans are heat-stable, so grilled, roasted and steamed spears rate the same as raw at the same weight: green at 15 g, red at 75 g. Fructans are water-soluble, so boiling does leave some in the water, but not reliably enough to change a serve. Portion size is what changes the rating.
What can I use instead of asparagus?
Green beans are the closest swap for a steamed or blanched side, and broccolini keeps the long-stemmed look on the grill. Zucchini batons roast well and stay green at their tested serve. All three take the same lemon, olive oil and parmesan finish, and none of them brings the 0.25 g of fructans that five spears of asparagus does.
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