Pesticide residues high in Vietnam's leafy greens, water spinach, and celery

Certain vegetables grown in Vietnam – including various cabbage‑type greens (cải xanh, cải ngọt, cải bẹ, cải thìa), water spinach (rau muống) and celery (cần tây) – are prone to higher pesticide residues. Their short growth periods and susceptibility to pests such as aphids, leaf‑miners and caterpillars often require more frequent pesticide applications. When the mandatory pre‑harvest waiting period is not observed, residues can remain on the produce.

Monitoring programmes in Europe and the United States have reported higher detection rates of pesticide residues in these vegetables compared with other crops. Nevertheless, the presence of residues does not mean all market‑available bundles are unsafe. Products cultivated under VietGAP, GlobalGAP or similarly strict safety standards typically meet Vietnam's food‑safety regulations.

Consumers can lower exposure by purchasing vegetables from trusted sources with clear origin labeling or certification, choosing seasonal items, storing produce properly, and washing or cooking it adequately. Five simple steps to reduce risk include buying certified produce, selecting intact and undamaged heads, avoiding overly soft or bruised greens, and following proper home‑preparation methods.