Precipitating C Serum

I made my vitamin C serum about 13 days ago.  I discovered in the retain I noticed a precipitate or crystals at the bottom of the container. Is this normal with this type of formulation? The stability doesn't have crystals for the same length of time.


  • Which form of vitamin C are you using? What pH are you at? Can you share at least the full ingredients list? People can only help when given more information
  • PerryPerry Administrator, Professional Chemist
    If you are getting a precipitate in your formula, you have a stability problem.
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