Oxalic Acid Content of Selected Foods

High dietary levels of oxalic acid or oxalates may promote urolith or bladder stone formation in herbivores like the guinea pig and tortoise. The following chart shows the oxalate content in 100 grams of selected raw foods:

Produce Oxalic acid (mg)
Parsley 1.70
Chives 1.48
Purslane 1.31
Cassava 1.26
Amaranth 1.09
Spinach 0.97
Beet leaves 0.61
Carrot 0.50
Radish 0.48
Collards 0.45
Brussels sprouts 0.36
Beans, snap 0.36
Lettuce 0.33
Watercress 0.31
Sweet potato 0.24
Chicory 0.21
Turnip 0.21
Eggplant 0.19
Celery 0.19
Broccoli 0.19
Cauliflower 0.15
Asparagus 0.13
Endive 0.11
Cabbage 0.10
Okra 0.05
Pea 0.05
Tomato 0.05
Turnip greens 0.05
Pepper 0.04
Kale 0.02
Cucumbers 0.02
Squash 0.02
Coriander (Cilantro) 0.01

a: Parsley and spinach are also rich in oxalates so offer these vegetables only sporadically to reduce the risk of calcium oxalate bladder stone formation.

 

Reference