Preventing Oxidation of Vitamin C Serum

Subject: Preventing Oxidation of Vitamin C Serum

Hello,

It's common for serums containing L-Ascorbic Acid (Vitamin C) to oxidize and change color over time, especially when exposed to light, air, and heat. This is because L-Ascorbic Acid is inherently unstable.

Based on your experience and the staff's reply, here are some points regarding preventing oxidation:

• Refrigeration: Storing the serum in the refrigerator helps slow down the oxidation process, as you've observed. This is a good method for extending the shelf life.
• Packaging: As the staff mentioned, using packaging that protects the serum from light and air is crucial. Opaque bottles and airless pumps are generally better than clear bottles or dropper bottles.
• Mixing Process: Minimize exposure to air and heat during the mixing process. Ensure all equipment is clean and dry.
• Water Purity: Using highly purified water (like distilled or deionized water) is important. Impurities, especially metal ions, can accelerate Vitamin C degradation.
• ROE (Rosemary Oleoresin Extract): While ROE is an antioxidant, the staff noted there is no specific research confirming its effectiveness in preventing oxidation of this particular Vitamin C formulation. Its impact might be limited in this context.
• Nitrogen Gas: Blanketing the product with nitrogen gas can help displace oxygen and reduce oxidation, particularly useful during manufacturing or transport. However, as the staff pointed out, it's not practical for consumers to maintain a nitrogen atmosphere during regular use.

In summary, while refrigeration is effective for home storage, the best approach involves a combination of factors: using appropriate packaging, careful mixing, pure water, and storing in a cool, dark place (like the refrigerator). Adding ROE may not provide significant protection, and nitrogen gas is not a practical solution for daily use.