Dissolving Wild Yam Extract in Oil for Cream

Wild Yam Extract (Diosgenin 95%) that you are using is soluble in highly polar oil, ethanol, and surfactant.

The reason for the dissolution problem you suspected is likely correct. This product is recommended to be stored in the refrigerator, and prolonged storage in a cool place can cause sedimentation. The manufacturer's recommendation is to take the product out of the refrigerator and leave it at room temperature for 3 hours before mixing. After that, mix it into the oil phase at 60 degrees Celsius for a short period to help the ingredient dissolve completely into the formula.

Therefore, using the Wild Yam Extract directly from the refrigerator without allowing it to warm up to room temperature is the main reason it did not dissolve in the oil.

Correct Procedure Summary:

• Take the Wild Yam Extract out of the refrigerator.
• Leave it at room temperature for approximately 3 hours.
• Mix it into the oil (preferably a highly polar oil) during the manufacturing process at 60 degrees Celsius for a short time to aid dissolution.