I tried to provide a few links, but this site won’t allow it
I recommend you go to consumer lab , enter that and .com and looks at their article on melatonin , Also google NIH articles on gastroparesis and foods that can help and hormones like melatonin that can help, Also, ask google if any of your meds contribute to weakening the LES or cause Gastroparesis, PPI’s do both and I think are one of the worse drugs