to drink it 20 minutes before eating anything else.
oats contain a special form of water soluble fibreDo you have constipation/diet issues? Oats are good for the heart and less damaging to your guts as the gluten in less aggressive than wheat fibre.
Wow, I was going to suggest 2-part silicone molding compound but after reading your additional details I think perhaps the best substance for you is probably tolerance - mix it with equal parts grace and appreciation and it works beautifully.