The guy who won the Nobel prize for giving himself an ulcer estimated it as 90%, which is very comfortably “most”. If that has been drastically estimated down I hadn’t heard.

Also don’t abuse advil, kids. OTC painkillers can burn a hole in your digestive tract. I in fact know someone missing a few feet of intestine because of chronic back pain and overuse of non narcotic painkillers.

> The guy who won the Nobel prize for giving himself an ulcer estimated it as 90%

That's worldwide. In developed countries the proportion is closer to 10 to 15% [1, 2]

[1] https://www.jwatch.org/na50875/2020/02/24/prevalence-h-pylor...

[2] https://pubmed.ncbi.nlm.nih.gov/31972622/

I did the oops too much Advil on myself naively over years. Gastritis and resolves once the cause is figured out but scared me to respect otc meds more.