Costco has the Mexican kind and I’d guess it’s labeled or the ingredients are on the back.
Also, I found as I passed fifty (which is now so far back I can’t even see it in the rear view) that my taste changed. Things I’d loved, chocolate cake, soft drinks, candy, no longer tasted good. Another possibility is Covid. One of the first symptoms is a change in the sensation of taste.
I have had that happen to me and I have not had COVID; started after I passed 60. I used to love to drink black coffee. I liked it so black that it bordered on espresso. One morning several years ago I drank some strong coffee with a somewhat bitter taste (I still liked it). Later that morning I became violently ill and started throwing up. Even though I don't think the coffee caused it, it was the last think I'd had before the nausea hit and for several weeks, I didn't drink it at all. Eventually I started drinking coffee again, but from that time onward I have had to have cream in my coffee to smooth out the bitterness and acidity. I no longer drink as much either. I used to love the flavor so much I drank decaf in addition to regular (but could not take caffeine all day). Now I drink about 3 regular cups of coffee per day (with cream) and I usually have to have a palette cleanser afterward to get rid of the bitter aftertaste.
Another taste that changed was IPA beer. I used to love extremely hoppy IPAs, but now the flavor profile does not appeal to me. They taste like someone poured some grapefruit juice into a beer. Now I cannot abide anything hoppier than Sierra Nevada Pale Ale or Samuel Adams Boston Lager.