Vitamin C Serum: Packaging, Storage, and Concentration Questions
Question
Regarding a Skinceutical CE Ferulic type formula:
- Can I use the plastic amber bottles with pumps sold by MySkinRecipes instead of glass bottles?
- For long-term storage (over 3 months), can I prepare the base mixture (all ingredients except Vitamin C), store it in the refrigerator, and add Vitamin C to a portion of the base monthly as needed?
- In the formula that recommends 15 percent Vitamin C, can I use 25 percent Vitamin C like in Paula's Choice spot treatment or Kiehl's products? Do I need to increase or decrease other ingredients?
Answer
Based on your questions and the staff's response:
Regarding the bottle type, the staff confirmed that the plastic amber bottles with pumps sold by the company are suitable for your vitamin C serum as they are made from acid-resistant grade plastic. While glass bottles might offer a higher perceived value, the company does not currently sell them.
For long-term storage (over 3 months) of the Skinceutical CE Ferulic type formula, the staff confirmed that you can prepare the base mixture (all ingredients except Vitamin C) and store it in the refrigerator. You can then add Vitamin C to a smaller portion of this base monthly as needed to ensure freshness.
Concerning the Vitamin C concentration, the staff noted that using a very high percentage (like 25% in Paula's Choice spot treatment) does not always yield better results than 15% for a general serum, and the 15% concentration is often more popular. The staff does not have a formula that can achieve 25% Vitamin C and suggested consulting "คุณ C7" for this specific inquiry.
I hope this clarifies your questions based on the information provided!
Related Products Mentioned
Pure-Ferulic Acid™
Vitamin C (L-ascorbic acid) (Ultra-Fine)
