Rest assured if its marked "100% pure essential oil" they are completely additive free. Our "essential oil blends" are also 100% essential oils that we have blended together to bring you a cost effective version of some very expensive oils.
Not all surfactants are created equally. While its true that some surfactants contain scary ingredients that aren't so skin safe, others are very mild and make a great 'base' ingredient for body care formulations.
Zinc is believed to assist with the healing of various skin issues as well as insect bites. It holds natural astringent and antiseptic properties, making it a good addition to recipes designed to treat skin issues. Non-nano / not micronized.