• Formulating

  Niacinamide PC and Vitamin C

  Posted by Lindsay on December 9, 2015 at 8:22 am

  Does anyone know of a reason why not to combine Niacinamide PC with one of the Vitamin C derivatives ( Ascorbyl Tetraisopalmitate) in the same product?  The final pH of the formulation is close to 5.5.  Are they compatible?

  sandydijon replied 9 years, 4 months ago 2 Members · 1 Reply
• 1 Reply

• 

  sandydijon

  Member

  December 12, 2015 at 10:29 pm

  I tried not to mix Niacinamide into any acidic formula because this is what I read about Niacinamide.

  Niacinamide: Typical concentration is 1-6 %, with 5% being a typical and effective
  concentration. For external use only. Avoid adding to an acidic product,
  ideal final pH of product should be 6. Should not be combined with
  l-asorbic acid. It can hydrolyze and form nicotinic acid at higher or
  lower pH, which can result in skin irritation.

  But I have seen a lot of vitamin C hyaluronic serums sold on Amazon contain Niacinamide and Vitamin C and no pH adjustor. Do you think we got a lot of “unsafe” products out there?

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