To start with your own witches brews, you have to invest a bit. Every product isn't much, but if you buy it at once, you will be spend a bit money. Everything for a healthy skin/hair without shit in it right?
! I make balsems witch consist of oil & fats. A cream is when you add water to it, because water & oil don't mix you need an emulsifier.
Bacteria and mold need water to live. You need an preservative
to kill the bacteria and mold.
Do you only make balsems, then there will be no micro organism because they can't eat something there.
Experience with balsems and use it for max 2 weeks.