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I want to know if Propylene Glycol from plants is there or not. If I don't wear this, which one can we use to compensate? It's safer. So what kind of preservatives should we avoid? and should be used as much as possible Please ask for information.

Hello! It is recommended to buy a scale with a resolution of 0.01g. The price is generally sold around 600-800 baht. It can be used for a long time. And accurate enough in. pH 3.0 is starting to be in the excessive range This is a period that some people may not be able to tolerate. Some people may...

I would like to know if there is any equipment that we can mix the substance precisely for homemade? For example, add 2% L-Ascorbic acid, something like this. I'm a newbie please advice. Oh, preliminary test to make vitamin C serum by myself. The value of serum with L-Ascorbic acid is at PH 3. I don...

I have a lot of knowledge. The owner of the post is very kind. take the recipe for review

How long can the above ingredients be used?