LJA said:
It can be pretty complicated, and I'm no expert, so I'd suggest reading up on the differen't ones. Personally, I don't think there's a "one-size-fits-all" when it comes to preservatives, unfortunately. The more I research, the more I'm seeing this. And I'm with you, Vonna. I'm not taking any chances on bacteria and other nasties.
Anyone else agree?
Ditto to all you said, LJA.
I just recently started venturing into making my own lotions (only 4 so far) after driving myself to confusion and almost near insanity via conducting gobs and gobs of painstaking research (there's lots and lots of opinions to wade through out there, that's for sure!), and
finally getting over my initial fear (well...sort of getting over it
).
When all was said and done, I decided on some well established recipes and chose for my preservative system Phenonip in conjunction with EDTA to boost its efficacy within those paticular recipes.
As for grapeseed extract and vitamin E- from all I've read, what kaseencook said in her post is right on. They are not very good at keeping bacteria, mold and spores at bay in lotions, but they do help prevent rancidity of oils.
Citric acid helps to lower the pH, but it's really not a preservative in the sense of killing bacteria, molds and spores, and too much can cause a problem with stinging of the skin with some people.
Here are some preservatives on the more natural side that I found listed over at the Herbarie:
http://www.theherbarie.com/Leucidal-Liquid--pr-439.html
http://www.theherbarie.com/Cosmocil-CQ-pr-228.html
http://www.theherbarie.com/Geogard-Ultra-pr-406.html
http://www.theherbarie.com/Tinosan-SDC-pr-400.html
My best advice is to do as much reading on all the different B & B forums that you can (there's a wealth of info out there to glean from all the experienced handmade lotion makers who sell to the public), and go to places like LotionCrafters and the Herbarie for background info on all the different preservatives. Both of those sites have many recipes, too. You can learn a lot just from looking at well established recipes.
Also- it's very, very good to read about sanitation procedures, too- i.e. making sure all your equipment is properly sanitised before proceeding, etc.. I almost drove myself insane researching that one, too.
I'm tellin ya- lotionmaking is not for wimps!
And I'm not even selling mine- they are just for me and my immediate family!
IrishLass