The others have already given you great advice, and if you are concerned then that is a red flag for you. Do you have to actually promote and sell the supplements? I would not be comfortable, either (my philosophy is hard work and whole foods). I cannot speak for that supplement, but did Google to see the ingredients in the different products. If you can continue to encourage a whole foods diet without the pressure of selling this supplement then great. Otherwise, you will need to choose what sits best with you and your philosophy.
Hope it all works out for you…