The farts. Good God the protein farts. No matter what kind I use. Brand, type, vegan, non-vegan, etc. Those damn protein shake farts can kill. The are the most unnatural smelling abominations the human body can produce. There are a number or reasons to not use protein powder supplements if you can avoid it. Actual health concerns. Yet in the end, it is the farts that stop me from using them.
I haven’t noticed it at all with pea protein, which I take several times a week. I usually don’t have shakes as when one puts fruit or other sugars into them, they get absorbed way quicker in the stomach and can lead to blood sugar spikes. Without fruit, I find protein shakes to be pretty disgusting, but ymmv.
Perhaps you could try combining them with more fibre… I usually put protein powder to cook in oatmeal with flax and chia seeds, with aspartame (to balance out the protein taste) with half cooked banana and uncooked blueberries.
I rarely drink the shakes straight anymore. I mix them with other food stuffs. I made these peanut butter balls where I added banana flavored powder and they were great. I had my first straight shake in months last night and my colon was not prepared for it. I even drank it steadily over like 3 hours with dinning in-between.