I don't know about you, but discovering that a wood sealant and a neck cream have an ingredient in common doesn't make me want to take up carpentry in a hurry. It does make me think twice about putting the cream anywhere near my swan-like. Strivectin's new Neck Cream includes Disodium Distyrylbiphenyl Disulfonate, which also shows up in a patent for a solution that "reduces edge swelling on wooden panels". Still, it may not be a bad thing; wood needs TLC too, surely.
The Cosmetic Database, put together by the Environmental Working Group, doesn't like disodium distyrylbiphenyl disulfonate one bit. It associates it with developmental/reproductive toxicity, organ system toxicity and irritation. Animal studies in the 1970s showed "sense organ effects" at low doses. However, I couldn't find anything more recent to corroborate this.
It turns up a lot in soaps and laundry detergent. Unilever describes it as an 'optical brightener', something that absorbs light to make it look whiter (optical brighteners have replaced 'blue' in washing powder to achieve that whiter-whites effect). It is also in Amatokin Eye Cream, which is made by the same group of companies as StriVectin.