To continue the tangent, I’m pretty sure this is not true for Huel. From their UK website:
All ingredients listed in Huel Powder v3.0 and Black Edition Huel are low FODMAP and for this reason they can be used alongside the Low FODMAP Diet and as part of your dietary routine if you have IBS. If you have IBS and an extremely busy lifestyle where convenience is a top priority, Huel could form a part of your eating routine to ensure you are achieving a regular meal pattern and optimal nutrition.
To continue the tangent, I’m pretty sure this is not true for Huel. From their UK website: