Zinc supplement forms

Hi everyone,i'm new to CureZone but I've been consulting it for quite a while and it helped me before. Now here's my problem: I strongly suspect of having pyroluria,I've been reading about it for quite a while by now and it simply describes me to every detail. Actually I have other health problems, I don't really know if they are related or not, I'm trying to figure it out. Anyway, I used to supplement with zinc and after 3 years of feeling like s*** I started to feel MUCH MUCH better after taking zinc for just a few days. There was no doubt in my mind, and in my body too, that i needed zinc. Now the thing is, I have several stomach problems (GERD, erosive esophagitis stage b) and intestinal too(SIBO: small instestine bacterial overgrowth) and as you probably know zinc is quite irritating to the GI tract and despite being able to take zinc at the beginning, now I get SEVERE stomach/intestine aches, even with very small amounts(3 mg).
I tried several forms: zinc gluconate,zinc oxide,zinc carnosine and zinc picolate and there is no difference,they all are too strong for me. Now that's a shame because zinc was the only thing that helped me get going otherwise I have absolutely no energy whatsoever.I was wondering if there is anybody who knows a zinc form that is not harsh on the stomach,I've been reading pretty much everywhere but I didn't find anything.
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