• Formulating

  Does antioxidant skincare need a chelating agent?

  Posted by ETcellphone on March 21, 2021 at 6:17 am

  For a vitamin C serum, to be specific. Would you make a point of including it in the formula? From what I have gleaned so far, it can prevent oxidation due to metals.
       The Prospector website has an article on vitamin C serums and informs that you should always use a chelating agent in the formula. Do you agree? Could it significantly prolong the shelf life of an antioxidant skincare product? 

  I have sodium phytate. Is there a certain percentage you think is best? LotionCrafter says to use between 0.05 - 0.5%. The serum I would be putting it in would be at least 65% distilled water and have a pH of 2.5-3, if that is important to know. 

  here is the article in case you were interested: 
  https://knowledge.ulprospector.com/5083/pcc-vitamin-c-an-effective-skin-care-active/
  

  EVchem replied 3 years, 1 month ago 4 Members · 5 Replies
• 5 Replies

• 

  Pharma

  Member

  March 21, 2021 at 8:33 am

  Correct, a chelate helps.
• 

  MarkBroussard

  Member

  March 21, 2021 at 2:09 pm

  @ETcellphone

  Yes, you should add a chelating agent to any formula, not just Vitamin C serums.  The chelating agent will serve as a preservative enhancer.

  As for a Vitamin C serum, Sodium Phytate is going to increase the pH of the formula.  You might be better off with a chelating agent such as Sodium Glutamate Diacetate or Gluconolactone, neither of which will affect the pH of your serum.

• 

  ETcellphone

  Member

  March 21, 2021 at 10:21 pm

  MarkBroussard said:

  @ETcellphone

  Yes, you should add a chelating agent to any formula, not just Vitamin C serums.  The chelating agent will serve as a preservative enhancer.

  As for a Vitamin C serum, Sodium Phytate is going to increase the pH of the formula.  You might be better off with a chelating agent such as Sodium Glutamate Diacetate or Gluconolactone, neither of which will affect the pH of your serum.

  Thank you so much for your comment! I didn’t know that about the sodium phytate. I am placing an order with LotionCrafter soon, I will order their Glucono Delta Lactone (GDL) which seems to be the same thing. Plus it moisturizes so that’s a nice side benefit. 

• 

  ETcellphone

  Member

  March 21, 2021 at 10:22 pm

  Pharma said:

  Correct, a chelate helps.

  Thanks for commenting  

• 

  EVchem

  Member

  March 22, 2021 at 4:25 pm

  you can also just use phytic acid  which is the acid form of the sodium phytate, it has very low ph.

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