Dietary fibre is the part of plant food your gut bacteria digest instead of you. It slows sugar absorption, which is why whole wheat and maida — identical calories — behave differently in your blood. Refining grain strips most of it out.
"Multigrain" means several grains, not whole grains — five refined flours still make a refined product. The word to find is "whole": whole wheat, whole jowar.
Brown bread's colour can come from caramel colour (E150) rather than whole grain. The fibre number and the first ingredient settle it.
Genuinely whole-grain products typically show 6–10+ g fibre per 100 g; refined ones show 1–3 g. The number is hard to fake.
Fibre earns a positive offset under the same cap as protein: it can improve a decent product's score, but cannot rescue a high-load one. The cap exists because "added fibre" is cheap and was the first thing our own gaming tests tried.