Are we talking about conservatives?
"I would like to know what types of preservatives are incorporated into the various preparations. I suspect that they are very compatible with the epidermis but are they also natural?"
At Nidé.co, we have chosen, for our formulations, to select preservatives compatible with the COSMOS standard. In everyday language it means "authorized in Organic".
We mainly integrate preservatives such as Tocopherol (derived from Vitamin E), Beta-sitosterol, Radish Ferment (by Leuconostoc bacteria), Sodium benzoate, or Citric Acid.
Some of them are synthetic like Sodium benzoate but they are necessary for us to guarantee efficiency against fungi, yeast and bacteria."