Home Cosmetic Science Talk Formulating General Antioxidant protection….

  • Antioxidant protection….

    Posted by Jackies on November 28, 2018 at 7:26 pm

    Is it necessary to include antioxidants in formulas that use fragrances and essential oils? Could fixed oils with long shelf lives and high antioxidant content offer protection to fragrance, etc. against oxidation?

    Christopher replied 6 years, 4 months ago 3 Members · 9 Replies
  • 9 Replies
  • ngarayeva001

    Member
    November 28, 2018 at 7:38 pm

    You need antioxidants every time you use oils. You don’t need it only when you use petrolatum, mineral oil, and synthetic oils because all natural oils do oxidize.

  • Jackies

    Member
    November 28, 2018 at 8:58 pm

    Thank you, @ngarayeva001. Do you happen to know of any research showing how fragrance oxidizes in fixed oils? I’d love to read more about it.

  • Jackies

    Member
    November 28, 2018 at 9:54 pm

    Sorry, @ngarayeva001. One more question. When you say “every time you use oils” does that mean fixed and fragrance alike? Thank you!

  • ngarayeva001

    Member
    November 28, 2018 at 11:06 pm

    There is quite a lot of information online but in summary all oils oxidize. The higher oil’s iodine value the faster it will oxidize. You can also analyze fatty acids composition, for example saturated fats are less prone to oxidation than monounsaturated fats. Polyunsaturated fats oxidize even faster. Try to google iodine value table. Let me know if you can’t find it. I should have it somewhere. I know that some carriers oils contain a lot of vitamin E (apricot kernel, cherry kernel etc) but unfortunately they won’t prevent essential oils from oxidation and will oxidize themselves. So, you need tocopherol in every formulation with oils. I don’t have a comprehensive study on carrier oils but I should have one on essential oils. 

  • Jackies

    Member
    November 29, 2018 at 1:28 am

    That is very helpful, and I will search that. Thank you for taking the time to answer my question and point me in the right direction!

  • Jackies

    Member
    November 29, 2018 at 1:30 am

    If you do come across the essential oils study, I would very much like to see that, @ngarayeva001. Thank you again.

  • Christopher

    Member
    November 29, 2018 at 5:04 am

    @ngarayeva001 sorry to ambush this thread but is there a recommended % of antioxdants to include? I’ve been reading about tocopherols and I see the them included from as low as 0,5 % to as high as 2 % to prevent oils from oxidating.

  • ngarayeva001

    Member
    November 29, 2018 at 9:56 am

    @Christopher, it is a good question, and I am trying to research it now. I recently read that some experts came to the conclusion that you need as little as 0.1%! And if you add more, you are actually increasing not reducing change of oxidation. We are talking about tocopherol here, that has the only purpose of preventing oils from getting rancid.

    Regarding tocopheryl acetate, it’s an active ingredient that is used for skin benefits. And you can actually use 2% if you want to. Some manufacturers suggest up to 5.

    If you analise LOIs of commercial products you will notice that tocopheryl acetate is used at a higher % than tocopherol.

    I will let you know if I find a reliable research paper.

  • Christopher

    Member
    November 29, 2018 at 11:46 am

    @ngarayeva001 Thank you for an insightful answer. Ill also be on the lookout and will let you know. 

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