I was finishing a jar of extremely hot peppers (7 pot primos) that I had fermenting on Thanksgiving day. I made a hot sauce with them and cantaloupe. I had them in a pan at a low simmer to meld the flavors. The problem was the steam coming off was potent as hell. It filled the house when everyone was arriving and coughing from the hot sauce in the air, me included. We had to open all the windows, dig out the fans to get it out of the house, freezing everyone in the process.
Most people eventually lose some degree of their ability to digest milk, because adults don’t rely on it as much. If you’re worried, a full serving of dairy a couple of times a month is more than enough for most people to keep up their digestive ability.
I’m not sure if I lost the ability to digest fatty meats or never had it, because I’ve never intentionally eaten pork, and was 26 the first time I ate lamb. My doctors have advised me not to try eating red meat, as it would be too hard for my body to digest it now. That could be an old wives tale, but it’s good enough for me