Jean B. wrote:

It's
kind-of neat that such things lead to desserts etc. that actually
are good for you.

Flax seeds and chia are sorta-kinda grain substitutes. I've used flax
seeds a few times. So far I have not noticed chia seeds in stores. As
you report seeing them at Costco I will likely see them at some point.

Like flax I take it they supply fiber. Filling in the short run without
contributing much carb per gram. I bounce back and forth between
deductin fiber counting it only as calories and counting fiber as 2 carb
calories per gram thus half the carb count by weight.