Some foods such as legumes can indeed produce excessive wind. The flatulence is the result of excessive gas produced through the action of the gut microflora. This often happens when people swiftly change from a low fibre diet to a high fibre diet including high fibre foods such as legumes.
We recommend you introduce TLC Lupin Protein Flakes gradually over 14 days if you are not used to these kinds of food in your diet. This will give your gut and gut bacteria time to adapt to the greater quantity of fibre arriving in the bowel.