Bok choy is not high in fiber. A cup of raw bok choy contains just 0.7 grams of fiber, and even a cup of cooked bok choy only provides about 1.7 grams. For context, most adults need 25 to 28 grams of fiber per day (based on the standard 14 grams per 1,000 calories), so a serving of bok choy covers a small fraction of that goal. That said, bok choy brings plenty of other nutritional value to the table, and its low fiber content actually makes it one of the gentler cruciferous vegetables on your digestive system.
Fiber Numbers: Raw vs. Cooked
Per 100 grams, bok choy contains about 1 gram of fiber regardless of preparation. The difference between raw and cooked servings comes down to volume. A cup of shredded raw bok choy weighs roughly 70 grams and delivers 0.7 grams of fiber. A cup of cooked (boiled, drained) bok choy weighs about 170 grams because the leaves wilt and compress, packing more plant matter into the same measuring cup. That’s why the cooked version clocks in at 1.7 grams per cup.
The fiber in bok choy splits roughly evenly between soluble and insoluble types. Soluble fiber absorbs water and forms a gel-like substance that can help moderate blood sugar and cholesterol. Insoluble fiber adds bulk to stool and helps keep things moving through your digestive tract. Neither type is present in large enough quantities to make bok choy a meaningful fiber source on its own.
How It Compares to Other Vegetables
To put bok choy’s fiber in perspective, a cup of cooked broccoli has about 5 grams of fiber. A cup of cooked Brussels sprouts delivers around 4 grams. Even a cup of raw spinach, another leafy green, edges out raw bok choy slightly. High-fiber vegetables like artichokes, green peas, and sweet potatoes are in a different league entirely, offering 7 to 10 grams per serving. If your goal is to increase fiber intake specifically, bok choy isn’t the most efficient choice.
Where Bok Choy Shines Nutritionally
Fiber isn’t bok choy’s strength, but its vitamin and mineral profile is genuinely impressive. A single cup of raw bok choy provides 35% of your daily vitamin C, about 27% of vitamin K, and 17% of vitamin A. It also contributes nearly 6% of your daily calcium, which is notable for a vegetable. All of this comes in a package that’s extremely low in calories.
Bok choy belongs to the Brassica family alongside broccoli, kale, and cabbage. These cruciferous vegetables are known for containing compounds that support cellular health and reduce inflammation. Bok choy delivers those benefits with a milder flavor and a lighter impact on your stomach than many of its relatives.
Easier to Digest Than Most Cruciferous Greens
One practical upside of bok choy’s low fiber content is that it’s gentler on digestion. Broccoli, cabbage, and Brussels sprouts are notorious for causing gas and bloating, partly because of their higher fiber and complex sugar content. Bok choy is much milder. If raw cruciferous vegetables tend to give you gas or other stomach discomfort, cooking bok choy can make it even easier to tolerate.
Bok choy is also rated low FODMAP at a standard 75-gram serving by Monash University, the leading authority on the low FODMAP diet. That means it’s generally well-tolerated by people with irritable bowel syndrome or other functional gut conditions who need to limit certain fermentable carbohydrates. This makes bok choy a useful vegetable to keep in rotation when you want cruciferous nutrition without digestive consequences.
Getting More Fiber From a Bok Choy Meal
Since bok choy won’t carry your fiber intake on its own, pairing it with higher-fiber ingredients is a smart strategy. Stir-fries with bok choy, edamame, and brown rice can easily reach 8 to 10 grams of fiber per serving. Adding lentils, chickpeas, or black beans to a bok choy soup pushes the count even higher. The mild flavor of bok choy makes it easy to combine with bolder, fiber-rich foods without clashing.
When shopping, look for heads that are firm from root to tip with no yellowing leaves or brown spots on the stems. Fresh bok choy holds its texture better during cooking, which matters if you’re adding it to dishes where you want some crunch alongside softer, fiber-rich grains or legumes.