DIY Serum Mixing, Stability, and Compatibility with L-Ascorbic Acid
Question
I would like to ask about mixing a DIY serum/essence for personal use.
The components are as follows:
- Galactomyces Ferment Filtrate 90 grams
- Repair Activator 10 grams
Can I mix these two parts in a bottle and use it directly?
** The focus is on skin recovery, strengthening the skin, resulting in smooth and bright facial skin.
Also, can the above ingredients be used together with a serum that contains L-ascorbic acid?
Answer
DIY Serum Mixing Advice
Regarding your plan to mix Galactomyces Ferment Filtrate (90g) and Repair Activator (Bifida Ferment Lysate) (10g) for a DIY serum/essence, here's some guidance:
Mixing the Ingredients: Yes, you can mix these two ingredients together. Both are water-soluble and can be combined directly. The proposed ratio is within the typical usage rates for both ingredients.
Direct Use and Stability: While you can mix them, simply combining these two ingredients without a proper preservative system is not recommended for long-term use. Water-based mixtures are prone to microbial growth over time, even when stored in the refrigerator. For safety and stability, a complete cosmetic formulation typically includes a preservative. Using this simple mixture directly might be risky in terms of hygiene and product stability.
Using with L-ascorbic acid serum: L-ascorbic acid serums require a low pH (typically between 2.0-4.0, ideally above 3.5 for FDA compliance) to remain stable and effective. Galactomyces Ferment Filtrate has a pH range of 4-7, and Repair Activator has a pH range of 4-5.5. Mixing your Galactomyces/Repair Activator blend with an L-ascorbic acid serum could raise the pH of the L-ascorbic acid serum, significantly reducing its stability and efficacy. It is generally best to use an L-ascorbic acid serum separately from products with higher pH levels. You could apply the L-ascorbic acid serum first, wait for it to absorb, and then apply your Galactomyces/Repair Activator mixture.
Benefits for Skin: The ingredients you've chosen align well with your goals. Galactomyces Ferment Filtrate is known for its ability to revitalize, smooth, and hydrate the skin, contributing to a more even texture and radiance. Repair Activator (Bifida Ferment Lysate) is recognized for its role in supporting the skin's natural repair processes and strengthening the skin barrier, which helps the skin become healthier and more resilient.
For a safer and more stable product, consider developing a full formulation that includes a suitable preservative system.
