Buy Whole Foods Psyllium Husks (125g)

What the brand says

Psyllium husks are a great source of fibre and can easily be added to smoothies, yoghurt, porridge or bread. It works by adding bulk to other ingredients by reducing the amount of moisture in things like bread making. It reacts the same way in the body by reducing the water in the gut and helping with constipation by loosening the stools. The husks turn into a gel whilst passing through the colon which helps to collect waste as it travels through. Psyllium husks can be used in bread making to help prevent crumbling results. It can be used as a binding ingredient for improved final results.