Though Green Mountain Soap Co. does have a few soaps to which fragrances and essential oils have been added (See Bayberry and the list of shaving soaps), it is true that our original flagship line of soap, both bars and liquid, is free of all additives. Period. None.
That is the second major point of distinction between Green Mountain Soap and nearly all other soaps on the market.
Remember the Saponification Reaction, above? Oils plus Caustic yields Soap plus Glycerin. So the purity of the oils and caustic will determine the purity of the soap and glycerin.
All of the oils used to make Green Mountain Soap are Food Grade oils. We use Tallow, Palm Oil, Coconut Oil, and Olive Oil for the oils (the triglycerides). And the caustic soda is always greater than 99% pure.
Because soap can pick up the scents and odors that surround it, we make all of our unscented products in a separate room that is used exclusively for making unscented products. The air conditioning system is separate and dedicated only to that room.
Any work with fragrances is done in another part of the facility, again with its own dedicated HVAC system. All facilities are air conditioned year-round so the soap will never get too hot. (Cold is no problem for the soap, but we do heat the buildings in the winter for the people working there.)
We do not now, nor have we ever, nor are there any plans for the future to perform any testing of our soap on animals. There has never been anything used to make our soap that is questionable enough to require testing for allergic reactions.
We do, however, admit to having done major testing over the last 35 years on members of the human race, homo sapiens. Happy results have always been the outcome.