There is an interesting genetic difference between cilantro-tolerant and cilantro-averse individuals. Similarly, some people smell asparagus in their pee, others don't. (The pee smells the same, in both cases.)
I read a long time ago, I think in Scientific American, that there are two different genes involved here: one that causes your pee to have that distinct asparagus smell or not, and a different gene that determines whether you can smell that particular aroma or not.
So the article divided people into four groups: smelly smellers, smelly non-smellers, non-smelly smellers, and non-smelly non-smellers.
I don't seem to be finding the original article, but here is a related one:
Part of my healthcare IT journey was as the LIMS Admin for 2 Tox labs, over the course of about 5 years. One of them was working on genetic markers for drug use. For example, of the 7 classes of Proton Pump Inhibitors, at that time, only 1 works for me. The rest either don't work, or work, but with lower efficacy.
The doc, handing it to me said, and I quote, "man, you got some weird genes". lol
So the article divided people into four groups: smelly smellers, smelly non-smellers, non-smelly smellers, and non-smelly non-smellers.
I don't seem to be finding the original article, but here is a related one:
https://www.abc.net.au/science/articles/2011/04/12/3189034.h...