Millennial here and I’ve had a similar experience. I ate a ton of red meat growing up, but once I got to my early-to-mid 30s, I noticed beef would give me a lot of stomach issues. I switched to eating chicken and sometimes (depending on the dish) substituting the meat entirely for black beans and found my stomach issues got a lot better. And it’s still just as tasty to me, so I don’t feel like I’m missing out on anything.
Millennial here and I’ve had a similar experience. I ate a ton of red meat growing up, but once I got to my early-to-mid 30s, I noticed beef would give me a lot of stomach issues. I switched to eating chicken and sometimes (depending on the dish) substituting the meat entirely for black beans and found my stomach issues got a lot better. And it’s still just as tasty to me, so I don’t feel like I’m missing out on anything.