Thanks for posting your query on this website. I can fully appreciate your concern for your problem.
1. You can use Guar Gum powder as a substitute for psyllium
2. The dose of Guar Gum is 5gm twice daily, to be taken with at least one glass of water.
I am confident that you will certainly benefit from the advice.
May I assure you that I am always available for your assistance and will try my best to cure your condition to the best of my experience and knowledge.
Please feel free to revert back to me in case of further clarifications, if any.
HAVE A NICE DAY AND A SPEEDY RECOVERY.
Dr.(Col) R Karanwal