@davidmccarlie unfortunately the latest version of Soylent still has lots of maltodextrin in it although they try to hide it. On this page: https://www.soylent.com/product/powder/
They display four main ingredients, brown rice protein, oat flour, sunflower order and vit blend.
But if you dig further you will find out they they carbs come from:
Maltodextrin 70g
Isomaltulose 47g
Potato starch 41g
Oat flour 24g
Rice Starch 13g
Trehalose 11g
Brown rice protein 7.5g
Algal Oil Powder 2g
Soy Lecithin 1g
So oat flour is just over 11% of the total carbs. I wonder why they highlight it as one of the four main ingredients.