Butyrate is one of the more genuinely interesting compounds in gut health science, which is exactly why it deserves a careful answer rather than a quick product.
A direct butyrate or postbiotic style supplement is an appealing idea on paper. Colon cells use butyrate as a preferred fuel source, and it is studied for its role in the gut barrier. But in India, ingredients such as tributyrin and sodium butyrate do not clearly sit on the FSSAI's permitted list for food supplements. Selling one compliantly would likely need a separate novel ingredient approval, and that approval does not exist yet.
So this is being handled honestly: as an open regulatory question, not a product that has been decided on. No dose, format or stability data has been invented to fill the gap, because that is exactly the kind of unverifiable claim this brand exists to refuse.
The more useful answer today is food and fibre, not a supplement. PHGG, resistant starch and other fermentable fibres, the kind already at the centre of blends like Nourish and Balance, are what gut bacteria convert into butyrate in the first place.
A postbiotic product may make sense one day. It will only carry the Fybrance name once the regulatory path is actually clear, not before.