ABSTRACT
Many diverse substances of natural or synthetic origin are known to exhibit beneficial effects on human health and appearance. Amongst the most important concerns for the cosmetic and pharmaceutical industries are not only the physical, chemical, and biological properties of these active substances and their actions but also ways to formulate, apply, and deliver them. Although these substances are often water incompatible, nature as well as humankind has found ways to blend immiscible oily and watery substances.
