Hard gainers jist don't eat enough food, or you just have naturally low test aka hypogonadism.I wouldn't consider myself to have a sensitive stomach but if I drink milk or have certain foods before I workout I will throw up.
I used creatine alot when I was in high school. I don't really know the history of creatine but back then I would get the powder, which was water based. I didn't really know what I was doing. I was in that 'bro science' phase so I probably wasn't using it right, just doing what idiots told me to do. I'd take it before and after my workout and I'd always throw up in the beginning of my workout. I thought it was why my biceps were so big so I kept doing it.
After high-school I stopped with body building mostly because I didn't care to workout and to take a bunch of supplements on top of PT. When I was allowed to workout on my own, I got back into supplements.
Theres like 3 different types of creatine, I don't remember all the different ones. The ones I took were pre-alkalnine and they came in pills. You are supposed to take it before (and after?) And it didn't upset my stomach at all. I only stopped taking them because I kept forgetting to take them before my workouts.
One thing you might want to look into is dextrose. Its the powder form of glucose after your workout. In theory its supposed to stop the muscle burning effect of exercise because your body releases insulin under stress. I can't say for certain that it helped me, just made me pee alot but when I was using it I was the heaviest I was at 190lbs. When I really learned all of this and how to workout properly I put on weight like crazy.
There isn't, alot of information out there for us hard gainers so you have to do whatever you can
Hard gainer. Test + Deca. Problem solved. Lol
If your feeling really frisky replace the Deca with Tren
You still have to put the work in and eat your face off. But the results will speak for themselves. PED's aren't for everyone but lifting is a waste of time without them once you get into your late 30s if you want to train like you did in your 20s.