Overview
About Bok choy
Bok choy is the brassica that behaves.
It is graded strongly anti-inflammatory, low in oxalate (a real difference from spinach and chard), low histamine, and mild rather than heavy on FODMAPs, which is not something you can say about cauliflower or a bowl of cabbage. The honest caveat is salicylates, where it lands moderate, and volume: the FODMAP rating is mild, not zero, so a whole wok of it is a bigger ask than a side portion.
Sensitivities
How Bok choy scores
Watch for
What trips people up
- Moderate salicylate rating, the only food-chemistry flag it carries. If you are on a strict salicylate elimination it counts toward your daily total even though it is far below the high-salicylate produce
- Mild FODMAP rating rather than a clean one, so standard side-dish servings suit most sensitive guts while very large volumes can still push symptoms
- The stir-fry, not the green, is often the trigger: soy sauce brings gluten and free glutamate, garlic and onion bring fructans, and oyster sauce brings both. Cook it plain first if you are testing it
Diet fit
Where it fits
Swap ideas
More alternatives
FAQ
Common questions about Bok choy
Is bok choy low FODMAP?
It rates mild, which in practice means a normal side serving is well tolerated by most people on a low FODMAP plan. It is clean on fructans, galacto-oligosaccharides, excess fructose and polyols, so it does not carry the fructan and polyol load that cabbage, cauliflower and broccoli do. Where people get caught out is eating it as the bulk of the meal rather than as a side.
Does bok choy cause gas like other cruciferous vegetables?
Less than most of them. The gas from cabbage, broccoli and cauliflower comes largely from fermentable sugars and polyols, and bok choy grades clean on those columns while the others do not. It is also mostly water and leaf rather than dense stalk. Cooking it rather than eating it raw softens the fibre further if your gut is reactive.
Is bok choy high in oxalate?
No. Bok choy grades low for oxalate, which makes it one of the more useful dark leafy greens if you are managing kidney stones or following an oxalate-restricted plan and have had to drop spinach, chard and beet greens. You keep the calcium, vitamin K and carotenoids without the oxalate load.
Do the goitrogens in bok choy affect the thyroid?
Bok choy contains glucosinolates like all brassicas, and these can interfere with iodine uptake in theory. In practice it takes very large amounts of raw brassica plus low iodine intake for that to matter, and cooking deactivates much of the enzyme involved. Normal cooked portions are not a thyroid concern for most people, but if you have a diagnosed thyroid condition and eat raw brassica daily, raise it with your doctor.
References
Read the background
Ratings reflect the Triggerbites ingredient database and may vary with portion size and preparation.