Yes traditionally oatmeal is soaked overnight, but how many of these producers of oat "milk" products will take the time to perform this extra step?
I first found out about soaked oats from _Wild Fermentation: The Flavor, Nutrition, and Craft of Live-Culture Foods_ by Sandor Ellix Katz, but interestingly it is an older practice, we now know improves digestability (excerpt from page 118):
> Oatmeal (or "oytmeal", as my father always calls it, in imitation of his immigrant grandmother) is the quintessential comfort food. It is soft and mushy, harkening back to that long ago time of infancy, when all our food was of such a consistency and lovingly spoon-fed to us. In early modern Europe, according to an article by Elizabeth Meyer-Renschhausen in the anthropology journal _Food and Foodways_, porridges were generally fermented and eaten as a "sour soup"[10]. Fermenting oats before cooking them not only makes them more nutritious and digestible, it makes the resulting oatmeal much creamer as well. For the freshest, most nutritious oatmlea, coarsely grind whole oats yourself when you are ready to use them, though steel-cut oats or rolled oats will work fine, too.
[10] _Food and Foodways_: "New Chapter Health Report", Elizabeth Meyer-Renschhausen, 2000
I first found out about soaked oats from _Wild Fermentation: The Flavor, Nutrition, and Craft of Live-Culture Foods_ by Sandor Ellix Katz, but interestingly it is an older practice, we now know improves digestability (excerpt from page 118):
> Oatmeal (or "oytmeal", as my father always calls it, in imitation of his immigrant grandmother) is the quintessential comfort food. It is soft and mushy, harkening back to that long ago time of infancy, when all our food was of such a consistency and lovingly spoon-fed to us. In early modern Europe, according to an article by Elizabeth Meyer-Renschhausen in the anthropology journal _Food and Foodways_, porridges were generally fermented and eaten as a "sour soup"[10]. Fermenting oats before cooking them not only makes them more nutritious and digestible, it makes the resulting oatmeal much creamer as well. For the freshest, most nutritious oatmlea, coarsely grind whole oats yourself when you are ready to use them, though steel-cut oats or rolled oats will work fine, too.
[10] _Food and Foodways_: "New Chapter Health Report", Elizabeth Meyer-Renschhausen, 2000