1, concentration control of essential oil: the concentration of essential oil needs to be strictly controlled, because too high concentration of essential oil will cause irritation and harm to the skin. Rose essential oil is a strong essential oil, and excessive addition will cause skin discomfort or irritation.

2. Stability of formula: Different essential oils have different compatibility and stability with other ingredients. Some essential oils will react with other ingredients, affecting the quality and stability of products. Ginseng lady oil is a traditional Chinese medicine preparation, also known as ginseng lady ointment or ginseng lady wax. It is an external ointment or oil agent made of ginseng as the main component through special extraction and processing technology.