Adulterated

Wine, olive oil, and honey are frequently adulterated, faked, or counterfeited.

Near-synonyms: laced, tainted, contaminated

The problem of adulterated milk has periodically reemerged as a public health menace, from New York in the 1850s to China in 2008.

Heroin is often adulterated with fentanyl.

A thin, crunchy lemon and thyme rosti was essentially the pimped-up aesthetic of the Kettle chip. That's OK. I like Kettle chips.