Looking on Amazon uk (which is never the cheapest option) a litre of “external use only” mustard oil costs £7.40 per litre, whilst the cheapest mustard oil for cooking (KTC Brand) is £10.00 per litre.
Examining the label of the KTC Brand shows it is only 51% mustard oil and 49% rapeseed oil.
100% mustard oil for cooking ranges from £26 to £126 (cold pressed) per litre.
I may be sticking to my usual brand which remains “for external use only”
Edit: Dubur brand is £16.90 per litre; I couldn’t find the Yandilla brand over here.
