I wouldn't, personally, because it's still a grain, and grains and I aren't really on speaking terms these days.

It can't be subbed cup for cup with either wheat or almond flour. Fiber is like a sponge and soaks up a ton of water. The usual conversion of coconut flour from wheat flour, for example, is about a quarter of the flour and add about a quarter to half again the liquid ingredients (often at least one additional egg and another cup or so of water). And coconut flour is only about 2/3 fiber!

To give an idea of how to use a high-fiber flour like oat or coconut, have a look at the recipes on this site -- http://satisfyingeats.com/ . Most of the recipes have a substitute for the almond flour (often sunflower seed flour). The crunchy waffle recipe, for example (http://satisfyingeats.com/breakfast/crunchy-waffles/), uses 7/8 of a cup of almond flour and 2 tablespoons of coconut flour.

This Reddit thread gives a good explanation of the purpose of oat fiber flour -- https://www.reddit.com/r/ketorecipes/comments/17okmf/request_how_to_bake_with_oat_fiber/

I like almost love bread and fortunately I came across this site of low carb breads, for those who don't/can't make their own bread. 10 Great Low-Carb Breads (and 1 to avoid!)

I was JUST looking at Amazon for oat fiber

I don't miss bread, but someone posted this video the other day that makes me want to try some (calls for oat fiber)

i used to use oatbran a few years back when i did the dukan diet, i wasnt sure if we could use it for the keto diet. would be interesting to find out becasue i loved making porridge with it.

@GillianSmith2 - My experience with this statement is that my keto isn't your keto, and what works for you may work for everyone else or no one else. The only way you would be able to know whether this will fit your keto macros is to try. I know that Dave Asprey and Chris Kressler and others have protocols out there to help you determine your upper keto carb threshold. My approach to this, if I were doing it, would be to follow a protocol and find your threshold, and if you feel confident in that number, see if your porridge works in that number and if your body reacts well to it...