Overview
About Rutabaga
Rutabaga, sold as swede in Britain and Ireland, is a cross between turnip and cabbage, and it behaves like a brassica root rather than a starchy one.
Across the food chemistry triggers it is quiet: no histamine, no gluten, no lactose, no nightshade, low nickel, mild oxalate and low salicylate, which is where it parts company with the turnip it is half descended from. Nothing on the panel is flagged high, so the useful cautions are all about how swede reaches the table: a paraffin wax coating on supermarket roots, a heavy raw brassica load if you shred it into slaw or juice it, and a mash that is usually as much butter and cream as vegetable.
Sensitivities
How Rutabaga scores
Watch for
What trips people up
- Oxalate grades mild for the peeled root, around 30 mg per 100 g, so swede stays on the plate when you are cutting oxalate. The heavy published figures belong to brassica leaves rather than roots, and boiling in plenty of water and draining lowers soluble oxalate further if you are being strict
- Supermarket swedes are usually dipped in food grade paraffin wax so they do not dry out on the shelf. Peel deep enough to take the wax off completely and do not roast them in their skins the way you would a potato
- A brassica, so it carries glucosinolates, the goitrogenic compounds of the cabbage family. This only becomes relevant in large raw amounts such as juice or daily slaw, and mainly if your iodine intake is low. Cooking reduces them
- Moderate on total FODMAPs by portion. Swede is a common potato substitute in low FODMAP mash, but a big serving of any brassica still gives the gut something to ferment
- The mash is rarely just the root. Swede is traditionally mashed with butter, cream and nutmeg or served under a roast, so log the dairy on its own line before you blame the vegetable
Diet fit
Where it fits
Swap ideas
More alternatives
FAQ
Common questions about Rutabaga
What is the difference between rutabaga and turnip for triggers?
They are different plants that get shelved together. Rutabaga is the larger yellow-fleshed root with a purple shoulder, a turnip and cabbage cross, while turnip is smaller and white-fleshed. On our grades the difference that matters is salicylate: rutabaga is low, turnip is moderate. Neither root is an oxalate problem, so if that is your concern either one works, and rutabaga is the one to reach for on a salicylate elimination.
Is rutabaga low FODMAP?
Rutabaga grades low on every individual FODMAP group, including fructans, and moderate on total FODMAPs, which is why swede mash is a standard potato stand-in on low FODMAP plans. The limit is volume rather than compound: a normal side portion is well tolerated, a bowl of swede as the whole meal is a large brassica load.
Is rutabaga high in oxalate?
No. The peeled root grades mild, around 30 mg per 100 g, which is why swede mash is one of the standard potato substitutes on a low oxalate diet. If you are being strict, boil it in generous water and pour that water away rather than steaming or roasting, since soluble oxalate leaches into the cooking liquid.
Do the goitrogens in rutabaga affect the thyroid?
Rutabaga contains glucosinolates like every other member of the cabbage family. In ordinary cooked portions this is not a practical thyroid issue. The situations described in the literature involve very large intakes of raw brassica, such as daily juicing or shredded slaw, combined with low iodine intake. Cooking deactivates much of the enzyme that produces the goitrogenic breakdown products.
References
Read the background
Ratings reflect the Triggerbites ingredient database and may vary with portion size and preparation.