Are yardlong beans high in oxalate?
C
Moderately. Moderate, 17 mg per 1/2 cup sliced
Range 17 to 17 mg across 1 study, 46 g serving
0 mg50 mg = a day60 mg+
Lower-oxalate swap: Broccoli, grade B, about 6 mg per 1/2 cup cooked.
Yardlong beans have a moderate amount of oxalate: about 17 mg per 1/2 cup sliced, which is 34% of the 50 mg a day many stone clinics aim for.
Boiling and draining lowers oxalate, because the soluble part leaches into the water. Compare the raw and boiled rows below.
Where this number comes from
Each row is one published measurement, converted to a 46 g serving (1/2 cup sliced). The grade and the range use the rows prepared the way the serving is eaten, and take the middle. How the grades work.
| Per serving | Per 100 g | Preparation | Source |
|---|---|---|---|
| 13 mg | 29 mg | Green, boiled (n=3) | Judprasong K., Charoenkiatkul S., Sungpuag P., Vasanachitt K., Nakjamanong Y, 2006via Foods 2023;12:3201, Table 5 (CC BY 4.0) |
| 17 mg | 38 mg | Green and raw (n=3) | Judprasong K., Charoenkiatkul S., Sungpuag P., Vasanachitt K., Nakjamanong Y, 2006via Foods 2023;12:3201, Table 5 (CC BY 4.0) |
By Oliver Silen · Data checked November 2, 2026 · Not medical advice