Oat milk is ok to use in moderation, wouldn’t ever use as a substitute to dairy for many reasons - oats are one of the main glyphosate affected crops, it’s not nutrient dense and has low protein and high sugar not to mention oat milk is also WAYYYY higher in carbohydrates than other dairy milk alternatives. Bc it is sourced from a grain, the carb content is around 15 grams of carbohydrates per serving compared to 1 gram per serving of almond milk. I buy unpasteurized milk directly from the farm and haven’t had any digestive problems - switched from using almond/coconut milk blend for years when my son was born.