Which natural product recall led to the most significant regulatory changes in the herbal supplement industry during the past decade?

In the natural products industry, recalls can happen for fascinating reasons unique to working with nature's ingredients. From unexpected allergen cross-contamination to wild-harvested herb misidentification, natural product manufacturers face distinctive challenges. This trivia tests your knowledge about one of the most significant natural product recalls in recent history that changed industry practices. Can you identify which event transformed how natural supplement companies approach quality control?

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The 2015 New York Attorney General investigation finding DNA from unlisted plants and no active ingredients in major retailers' herbal supplements
The 2018 nationwide recall of organic spinach contaminated with naturally-occurring toxic alkaloids
The 2016 recall of essential oil diffusers causing respiratory issues due to compounds from rare Amazonian plant extracts
The 2019 discovery that sustainably harvested sea moss supplements contained microplastics from ocean pollution