Stability and Mixing of Vitamin C L-Ascorbic Acid with Hyaluronic Acid in Acidic Serum
คำถาม
I am making a DIY cosmetic serum. I plan to mix pure Vitamin C L-Ascorbic Acid with pure Hyaluronic Acid and use it for a short period (7-14 days). The target pH is 3.0.
- What level of accuracy is recommended for a weighing scale for DIY cosmetic mixing?
- Will mixing pure L-Ascorbic Acid with pure Hyaluronic Acid at pH 3.0 cause degradation, even if used within 7-14 days?
- Will other ingredients, such as peptides and natural extracts, be degraded by a pH of 3.0?
- Are there alternative ingredient combinations or Vitamin C forms that are more stable for skin brightening?
คำตอบ
Hello!
Regarding accurate measurement for DIY cosmetics, a scale with 0.01g accuracy is recommended. These are generally available for around 600-800 THB and should be sufficiently precise for your needs.
For the pH of your Vitamin C serum, a pH of 3.0 is on the acidic side. While some individuals may tolerate this, a safer and generally well-tolerated range is around pH 3.5. It's important to note that very low pH levels can potentially degrade other ingredients in a formulation, particularly peptides and natural extracts.
Concerning mixing pure L-Ascorbic Acid with pure hyaluronic acid for short-term use (7-14 days): Hyaluronic acid is stable in acidic conditions. However, L-Ascorbic Acid is prone to oxidation, which causes it to lose quality and effectiveness over time (indicated by the liquid turning yellow). Even for short periods, oxidation will occur and reduce the potency.
For more stable brightening formulations, the staff recommends these alternatives:
- Option 1: Mixing Alpha-Arbutin + Vitamin B3 + N-Acetyl Glucosamine.
- Option 2: Using Ethyl Ascorbic Acid, possibly combined with Alpha-Arbutin for enhanced effectiveness.
If you prefer to continue using Vitamin C L-Ascorbic Acid, it is highly recommended to mix it daily. Using an ultra-fine powder form makes it very easy to dissolve in water without needing heat. Mixing daily ensures the freshest product with the best possible effectiveness.
ผลิตภัณฑ์ที่เกี่ยวข้องที่กล่าวถึง
Alpha Arbutin (Switzerland)
Safe-B3™ (Vitamin B3, Niacinamide)
GlucoBright™ (Acetyl Glucosamine)
Vitamin C (L-ascorbic acid) (Ultra-Fine)
