[swaikstan]

Thank you!

[swaikstan]

Pattsi said:

Have you checked ferulic acid solubility?

Can you explain what does it mean to check? I see that the solution of ferulic acid in pentylene glycol (for example) becomes clear after heating so I decide that ferulic acid is solubilized. Or there’s another way to check it?

[swaikstan]

ggpetrov said:

If you want to gain your knowledge into the cosmetic formulations you’d better read the threads in this forum. Guys like Perry have a lot of experience in the proffesional industry, so their comments could be very useful. And ofcourse you should make some personal experiments to find out the answers of your questions.

Thanks a lot for your answer! Recently, I also came to this conclusion. I am glad that I found this forum with such intelligent people.

[swaikstan]

Thank you! Your answer is more than satisfying.

[swaikstan]

Perry, thank you for a quick and detailed answer! You’re right - it’s a little hard for me to put a proper question, because English is not my native language. But I’ll try to specify it.
I thought that we are putting oils in skin care products because of their fatty acids (which are essential for skin), phytosterols, tocopherols and so on. It’s not that way?
I’m living in Ukraine, and here all the formulators are trying to reach a balance of different fatty acids in lotions (for example, between oleic and linoleic acids or a-linolenic and y-linolenic acids). If the skin is dry it needs more oleic one, if oily - more linoleic.
But there is no agreement among them on the total amount of oils in cream. Not because of their tactile characteristics or rate of absorption, but because of “the need for the stratum corneum and the epidermal barrier”. 

But from your answer, I realize it supposedly does not matter. Is that really so?