Oxalate reference · Nuts and seeds
Oxalate in chia seeds
61 mg in a 1 Tbsp serving, which the Oxalosis and Hyperoxaluria Foundation bands as moderate. That is 470 mg per 100 g. It sits above 70 of the 83 foods with a page here.
What is worth knowing about chia seeds
Chia is the one seed here that is worth watching, at 470 mg per 100 g and moderate in a single tablespoon. That is a lot for something eaten by the spoon rather than the handful, and chia pudding is a daily habit for the people who have it at all. Linseed, which gets used the same way for the same reasons, measures a fraction of it.
The published figure
| As listed | Band | mg per 100 g | Serving | mg per serving |
|---|---|---|---|---|
| Seeds, Chia, Bob's Red Mill | moderate | 470 | 1 Tbsp | 61 |
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 chia seeds, and doing the same job
Ranked by the most representative form of each, chia seeds is 9 of 12 in nuts and seeds. 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 |
|---|---|---|---|
| Pumpkin seeds | low | 2 | 2 Tbsp |
| Linseed (flaxseed) | low | 2 | 2 Tbsp |
| Sunflower seeds | low | 9 | 1/4 cup |
| Macadamias | low | 13 | 1/4 cup |
| Pecans | low | 15 | 1/4 cup |
| Walnuts | low | 18 | 1/4 cup |
| Peanuts and peanut butter | moderate | 38 | 1/4 cup |
| Hazelnuts | moderate | 53 | 1/4 cup |
| Chia seeds (this page) | moderate | 61 | 1 Tbsp |
| Cashews | moderate | 72 | 1/4 cup |
| Almonds | high | 107 | 1/4 cup |
| Sesame seeds and tahini | high | 114 | 1 tsp |
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
