Is it permissible to use Vaseline cream that contains "hydrolyzed keratin" without knowing the method of slaughter of the animal that produced this substance in New Zealand, and whether the substance has undergone a transformation (istihalah) or not?

It is permissible to use Vaseline containing keratin unless you are certain that it is derived from an animal. If the keratin transforms into another substance before being added to the Vaseline, its use is permissible. Ascertaining this requires consulting those responsible for preparing these compounds. It is worth noting that some doctors confirm the transformation of meat into another essence before addition, but the matter requires further research.