One morning, about a month ago, I walked out of my Brooklyn apartment on a quick mission to buy shampoo and ended up having six drops of CBD, the cannabis-based elixir, administered beneath my tongue by a Coloradan named Bodē. Such things are liable to happen in New York City these days. Bodē was in Zoë’s Beauty Products, my local cosmetics store in Greenpoint, talking up a line of CBD tinctures to the women behind the counter. It was obvious from his laid-back vibe, and his R.E.I.-inspired look, that he was not from the area. I might have ignored his pitch, and gone about my business browsing aisles of thirty-dollar conditioner and lilac hand creams, except that CBD—also known as cannabidiol, a nonpsychoactive chemical, found in marijuana and hemp plants, that has become the latest trendy ingredient among the wellness crowd—had been pursuing me around the city like the monster from “It Follows.”

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