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While leeks are virtually anti-allergenic, they’re part of a small group of foods that contain oxalates, which are naturally occurring ions found in plants, animals and humans.
Generally, this is nothing to be concerned about — however, in people who have untreated gallbladder or kidney problems, a buildup of oxalates in body fluids could possibly cause complications in pre-existing conditions.
If you have untreated gallbladder or kidney issues, consult with your doctor before consuming high quantities of leeks. *
