Oxalate reference · Leafy greens
Oxalate in mustard greens
5 mg in a 1/2 cup, chopped serving, which the Oxalosis and Hyperoxaluria Foundation bands as low. That is 7 mg per 100 g. It sits above 20 of the 83 foods with a page here.
What is worth knowing about mustard greens
Mustard greens are low, and they carry the bitter, peppery note that people usually miss when they drop silverbeet. Sold in Australia as mustard leaf or in Asian grocers as gai choy.
The published figure
| As listed | Band | mg per 100 g | Serving | mg per serving |
|---|---|---|---|---|
| Mustard Greens, boiled or steamed | low | 7 | 1/2 cup, chopped | 5 |
Bands are per serving as the OHF lists them, so a food can be high per 100 g and low in the portion anybody eats. Turmeric and dried parsley are the clearest cases of that, and neither is a problem in a kitchen.
Lower than mustard greens, and doing the same job
Ranked by the most representative form of each, mustard greens is 5 of 9 in leafy greens. These are the ones beneath it, which matters because a substitute is only useful if it does the same thing on the plate.
| Food | Band | mg per serving | Serving |
|---|---|---|---|
| Rocket (arugula) | low | 1 | 1 cup |
| Kale | low | 3 | 1 cup |
| Lettuce | low | 3 | 1 cup, shredded |
| Cabbage | low | 4 | 1 cup |
| Mustard greens (this page) | low | 5 | 1/2 cup, chopped |
| Turnip greens | low | 6 | 1/2 cup, chopped |
| Collard greens | low | 21 | 1/2 cup |
| Swiss chard (silverbeet) | high | 237 | 1 cup |
| Spinach | very high | 493 | 1/2 cup |
Before you act on the number
A figure in a table is not a figure in your urine. Oxalate in a plant moves with variety, ripeness, soil, season and cooking — boiling leaches a good deal of it into water that is then poured away. What you absorb also depends on what was on the plate with it, because calcium eaten in the same meal binds oxalate in the gut so that it leaves in the stool instead of the urine.
There is no daily target on this site. The OHF publishes bands per serving, not an allowance, and what any one person should aim for depends on their stone chemistry and their own testing. If you have been given a number, that number wins over anything here.
Restriction is not the first move. Guideline advice for recurrent calcium oxalate stones starts with fluid, with normal calcium taken alongside meals, and with less sodium — and it recommends the fruit and vegetables a low-oxalate list tends to strip out.
All 83 foods, and the full published table · Why a low-oxalate list is the wrong tool for planning a diet · Why calcium belongs with the meal, not off the plate
