I normally go to starbucks to get my coffee and havn't had any problems. I decided to start brewing my own coffee at home and bought dunkin doughnuts original and can't tolerate it. I throw it up with out even finishing one cup three days in a row. The only thing i can think of is that starbucks is a darker roast and therefor has less acidity? any Ideas and has this happened to anyone else?

Same here Dunkins blend has some hidden enhancement chemicals in it that some WLS and even Non WLS people can not tolerate -

i have a friend that can drink coffee by the gallon but throws up the Dunkin right away

Wow! IDNKT!!! Thanks for the info. I hate their blend's taste...but sorry you are upchuckin'! No fun! Hey you might try BP's new coffee. I think Alex just got in a new low acid organic coffee. I want to try it. Cuz you know...I love low acid.

Have you tried Whole Foods coffee? They have a bunch of dark roast and are surprisingly cheap .. 2lbs for $10. ? this is what I drink pre op... I hope I don’t get sick off of it after surgery (doc is fine with caffeine)

There's very little difference in acidity between dark and light roasts. You might wanna try cold brew.

https://henryshouseofcoffee.com/2018/03/03/whats-better-for-your-stomach/

Trader Joe's cheapest medium roast coffee works for me.

i had a venti christmas blend from starbucks today....no problems. I don't know why I can tolerate it with no problems but I'm not going to spend much time figuring it out. just going to stick to starbucks for now on.

Be wary of additives or hidden sugars...

I just buy a half decent brand from the local supermarket and add hot water and I'm good no issues at all... Been drinking coffee regularly the last couple of WEEKS!