Psyllium husk

Concerned that iron tablets might make me constipated ( and also trying to bring down my bad cholesterol) I now eat a chia pudding every day consisting of chia seeds flax seeds milk yoghurt and honey. I thought it might make my IBS worse but, in fact, it has helped it.

I would advise against as it can cause intestinal obstruction and faecal impaction. If you are already taking a laxative then you are bombarding your gut with products which are working against one another.

If an endoscopy has found nothing wrong then you need to look at your natural diet - and to exercise more if you think you don’t do enough.

Why is your diet at the moment? Is it meat heavy? Do you eat enough fruit and vegetables?

A change of diet could also bring down your bad cholesterol levels removing the need for Atorvastatin.

www.nhs.uk/conditions/constipation/

Psyllium husk will only help with your constipation.
It won’t put right your gut health, ie your good and bad bacteria.
You need a good probiotic. Be aware that most probiotics get destroyed in the stomach ( acid destroys it) before it gets to your intestines. where it does the work.
I take Symprove when I need it. It was the first probiotic to developed to get around the problem of the stomach acid.