Usage and Preservation of Double Hyaluron Liquid and Yeast Ingredient Comparison

Question

Based on the desired properties of yeast (skin cell repair, wrinkle reduction), I was considering Yeast Resurface and beta glucan. I initially wondered if these were related to Saccharomyces Lysate. Now I understand there are many strains and different INCI names (Saccharomyces Lysate Extract, Bifida Ferment Lysate, Yeast Extract, Saccharomyces cerevisiae extract).

My questions are:

1. If I use both Yeast Resurface and beta glucan together, will they have synergistic properties?
2. Regarding Double Hyaluron Liquid for very dry skin, can I use it up to the maximum of 10% (e.g., 10g in 100g cream)?
3. Double Hyaluron Liquid is preserved with Phenoxyethanol 0.5%. Is this sufficient preservative for the entire cosmetic formulation, or do I need to add another preservative like NaturePreserve™? Should I consider the specific formula first?

MySkinRecipes Expert · Accepted Answer

Here is the information regarding the ingredients you inquired about and the follow-up questions:

Phosphate buffered saline (Sodium chloride + Sodium phosphate): As the staff mentioned, this is typically used to dissolve SOD (Superoxide Dismutase). The store currently does not have plans to stock SOD due to unclear benefits for the skin, and therefore, Phosphate buffered saline is also not available.
Saccharomyces Lysate Extract: You are correct in noting the different INCI names. Saccharomyces Lysate Extract, Bifida Ferment Lysate (found in Repair Activator), Yeast Extract (found in Yeast Resurface), and Saccharomyces cerevisiae extract (found in beta glucan) are indeed different ingredients, even though they are all related to yeast or fermentation.
- Based on the properties you are looking for (skin cell repair, wrinkle reduction), the staff explained that Yeast Resurface (Yeast Extract) is developed for skin renewal/exfoliation, while beta glucan (Saccharomyces cerevisiae extract) is developed for reducing irritation and strengthening the skin. They serve different functions.
- Regarding using Yeast Resurface and beta glucan together, the staff stated that they do not provide synergistic benefits as their functions are distinct.
Superoxide Dismutase (SOD): As mentioned in point 1, the store does not currently plan to stock SOD due to unconfirmed benefits for the skin.
Ipomoea Batatas Extract (sweet potato extract): The staff currently has no information on this ingredient but will forward the name to the relevant department for further research.

Regarding your follow-up questions about Double Hyaluron Liquid:

Your understanding of the usage concentration for very dry skin is correct; you can use up to 10% of the Double Hyaluron Liquid (equivalent to 0.5% pure Hyaluronic Acid). However, the staff recommends using it in moderate amounts in combination with other skin-nourishing ingredients for better overall benefits rather than using a single ingredient at a very high concentration.
Regarding preservation, the 0.5% Phenoxyethanol present in the Double Hyaluron Liquid is a preservative for the liquid product itself, but it is generally not sufficient to preserve your entire final cosmetic formulation. You will need to add an appropriate amount of a suitable preservative (such as NaturePreserve™, which you are considering, or another) to your formula to ensure its stability and safety, unless the Double Hyaluron Liquid constitutes a very large percentage (almost 100%) of your final product.