Of anything I've tried that is a "meal", nothing has spiked my blood sugar as much as a bottle of Soylent.
I really wanted to use Soylent but when my BS spiked to 350 after multiple 2h post meal tests, on multiple days, I just had to give up on the idea.
To give you an example, my BS will hit about 200 2h after a big bowl of Oatmeal and then settle back to 130-150 range.
If I eat just vegetables for a week, for example, my BS will move to the 90-120 range.
Soylent might be better than a frozen pizza or fast food, but in the big picture it's still shit compared to real food.
My only concern about Soylent is if I should be ingesting this much soy as a male of European descent.
Afraid it's going to make you impotent?