Is onion high in oxalate?

Onion: oxalate content (1.70 mg/100 g)

Onion contains about 1.70 mg of oxalate per 100 g, which is low for oxalate.

1.70 mg/100 g

By portion

Portion	Grams	Oxalate
1 serving	100 g	1.70 mg

Source

“Onion Allium cepa — Raw: total 1.7, soluble 1.6 (mg/100 g FW)”

Oxalate in Foods: Extraction Conditions, Analytical Methods, Occurrence, and Health Implications (Foods 2023;12(17):3201) · 2023 · CC BY 4.0

Also tracked for this food: histamine

Food composition data, not medical advice. Reported tolerance thresholds vary widely between individuals, so a value being high here does not mean you will react to it.