For example, in Bangladesh, turmeric adulteration with lead chromate pigment was identified as a primary source of lead exposure.

Source: https://indianexpress.com/article/opinion/columns/a-hidden-adversary-despite-being-a-recognised-global-concern-lead-poisoning-is-unaddressed-8909773/

When researchers sampled and tested turmeric across the country before and after the intervention, the level of adulteration in this one study dropped from 47 percent to 0 percent.

Source: https://worldcrunch.com/culture-society/afro-hair-in-cuba

While adulteration gets belated attention at times, experts believe that a more intractable problem is that of substandard drugs that delay or compromise treatment.

Source: https://indianexpress.com/article/opinion/editorials/indias-drug-detox-digital-update-regulator-upgrade-9033985/