Bhai Misbah, yes, dietary fiber helps reduce the post-meal glucose spike. But SubhanAllah, the blessed barley bread already contains both soluble and insoluble fiber. Depending on the flour and preparation, 100 g of whole barley bread (with husk) can provide around 8–10 g of fiber. So, when you make barley bread a regular part of your diet, you may not need to add extra fiber in your meal.
My sincere recommendation is that you gradually move away from white rice and white-flour roti and make blessed barley bread your preferred staple instead.
Barley is not just a nutritious food; it also holds a special place in our religious tradition. Let us revive this blessed Sunnah by bringing barley back into our daily lives.
Hasan Shami