https://www.sciencedirect.com/science/article/abs/pii/S096399691400698X
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9368013/
When googling unfortunately most sites are SEO food blogs, that don’t refer to it properly. That beans cause gas is generalyl known though and for some people thatcan compound with other digestive problems.
That beans cause gas is generalyl known though
It’s also known that after a while people adapt. The intestinal microbiome grows more methane-metabolising bacteria, thus decreasing the severity of any gaseous issue.
But it’s true that some digestive deseases may limit people’s ability to consume large amounts of legume.