My great Aunt is in her 90s. She is always taking a class at her local community college. One semester it’s philosophy, the next it’s German. And she is still sharp as a tack.
I broke out with a massive case of hives once when I was going through a difficult time.
Whenever my kids or I get bitten up (we have a terrible fly season here in the Catskills), I get out my lavender essential oil.