I am currently working on a new hair conditioner with protein. We have available Hydrolyzed Rice Protein @ AUD$ 810.00 per Kg (about US$640.00). This is the only form of protein available from our regular suppliers. At recommended useage rates of around 2%, this is making the hair conditioner very expensive.
(1) Is this the going price for protein these days?
(2) Any possible subbsitutes for protein?