Cetyl ethylhexanoate is an ester of cetyl alcohol and 2-ethylhexanoic acid. Cetyl ethylhexanoate is an odorless, colorless liquid that is insoluble in water, but freely miscible with vegetable, mineral, and synthetic oils and fats. Cetyl ethylhexanoate works as an emollient, skin conditioner and thickening agent. It lubricates the surface of the skin/hair, removes the appearance of dry patches and flakes and gives the skin a soft and smooth look. It gives cosmetic products water-repelling properties and an easy spreadability. Cetyl ethylhexanoate is used in the cosmetic industry as a base oil in the production of a wide variety of cosmetics and personal care products. For example, it can be found in products such as makeup remover, lipstick, foundation, facial moisturizer, anti-aging treatment, lip/eye liner, hair conditioner, and eye shadow.

Hydroxytyrosol is an important phenolic compound obtained from olive oil. Hydroxytyrosol possesses anti-inflammatory properties and has the capacity to inhibit cyclooxygenase and lipoxygenase enzymes. Hydroxytyrosol is a powerful antioxidant due to its protective function in cells. Hydroxytyrosol protects the cardiovascular system, avoiding oxidation of LDL cholesterol, maintaining normal blood HDL cholesterol concentrations and thus preventing atherosclerosis. Hydroxytyrosol protects brain cells from lipid peroxidation because it easy penetrates through the blood-brain barrier. Thus, the compound can be used in the disease treatment of Alzheimer or Parkinson. In addition, the compound also helps to prevent osteoporosis because its consumption has positive effects on the formation and growth of bones. Hydroxytyrosol is under investigation phase II clinical trials for breast cancer women to evaluate its effect on mammographic density. The recently published article has shown hydroxytyrosol could prevent obesity and insulin resistance by altering the composition of the intestinal microbiota and improving the integrity of the intestinal wall.