Formula Review: Serum, Brightening Cream, and Watery Essence

Question

I have developed three cosmetic formulations and would like feedback and compatibility checks:

Serum for Wrinkles (Normal Skin): What is your feedback on this formula?
- Ingredient A: Plankton GP4G™ (percentage not specified in answer, but implied to be adjusted)
- Ingredient B: Silky Serum Base (usage instructions needed)
- Other ingredients (compatible)
Brightening Cream (Normal Skin): What is your feedback on this formula, particularly regarding texture and color?
- Oil Phase: Sweet Almond Oil + Shea Butter (Total 20%)
- Active: French Pine Bark Extract
- Other ingredients
Watery Essence (Normal Skin): What is your feedback on this formula, particularly regarding compatibility?
- Ingredient: Reservoir-Tech
- Base: Water-based
- Other ingredients

Additionally, is it necessary or effective to use all three products together? Can ingredients like Pitera and Apple Stem Cell be combined into a single formula?

MySkinRecipes Expert · Accepted Answer

Regarding your formulations for serum, cream, and watery essence:

Serum for Wrinkles (Normal Skin):

The staff suggested reducing Plankton GP4G™ to 2% for normal skin.
Other ingredients are compatible.
Please check the usage instructions for Silky Serum Base as it requires blending.

Brightening Cream (Normal Skin):

The total oil percentage (Sweet Almond Oil and Shea Butter) is quite high (20%) for normal skin and may feel sticky. The staff recommended reducing it to around 15%.
French Pine Bark Extract may darken the formula. The staff advised removing it if the cream is intended for daytime use.

Watery Essence (Normal Skin):

Reservoir-Tech is not compatible with water-based formulas and will separate. It should only be used in gel or cream formulas.

General Recommendation:

Using all three products together may be unnecessary. It is often more effective to use a single formula tailored to your specific skin type and concerns.
For example, you could incorporate ingredients like Pitera and Apple Stem Cell into a single serum or cream formula.