⁣Do wild vegetables contain oxalic acid?

The issue of oxalic acid in wild vegetables does require a scientific approach.

universality
Most wild vegetables (such as purslane, dandelion, shepherd's purse, amaranth, etc.) contain oxalic acid, but the content varies greatly. For example:

High oxalic acid: amaranth (about 300-500mg/100g), purslane

Low to moderate oxalic acid: shepherd's purse, dandelion tender leaves

Risk points
Oxalic acid easily combines with calcium to form calcium oxalate (the main component of kidney stones), and long-term excessive intake may:

Affects calcium absorption

Increased risk of stones (especially in patients with urinary system diseases)