Why not? It was a niche hippie/health-nut thing back then, but it was around.

Here's a random article i found from forbes that goes into it a bit: https://www.forbes.com/sites/christinatroitino/2017/02/01/ko...

How about someone in 2022 describing something taking place in the 90s? That part was not in the dialog taking place in the 90s but the author describing the scene.

According to my Ukrainian co-worker, back in 90s Kombucha was known as a horrible traditional delicacy similar to surströmming, hákarl or casu marzu.

And yes, I have had a co-worker who drank weird smelly herbal teas and was obsessed with vitamins among other things. And a different one who had a mug that was covered with thick black crust inside and who insisted that it must never be washed.

Paraphrased in the present, I guess.