Acai was proven (in vitro) to have powerful antioxidant properties and an ability to help regulate skin lipids, thereby promoting skin repair activities. It is theorized that this is perhaps due to its fatty acid and phytosterol content. Constituents include vitamin C, phytosterols, polyphenols, beta-sitosterol, vitamin E, vitamin B1, B2, B3, beta-carotene, palmitic acid, stearic acid, arachidic acid, palmitoleic acid, oleic acid, and linoleic acid. It is recommended for use in moisturizers, after-sun products, and cosmetic preparations destined to improve skin softness.
Mary Kay has a patent on “Compositions comprising kakadu plum extract or acai berry extract.”
According to the patent literature, “the inventors have discovered that the combination of kakadu plum extract and acai berry extract produce synergistic and complimentary effects that are beneficial to skin. For example, the two extracts can work together synergistically to produce effects that exceed the effects of what would be expected if the extracts were used in separate compositions. Non-limiting synergistic effects include the reduction of internal or external oxidative damage, increased collagen production, reduction in inflammatory responses and the inhibition of melanogenesis […] kakadu plum extract can reduce inflammatory responses (e.g., the reduction of inflammatory cytokine production) by certain cytokines that are not reduced, or not as significantly reduced, by acai berry extract, and vice-versa.”
In vitro methods
The ability of acai berry extract to act as an antioxidant was evaluated using the Peroxide Assay and the ability of acai berry extract to reduce inflammation in human epidermal keratinocytes was studied using a cytokine array assay. The ability of acai berry extract to increase collagen production in human fibroblast dermal cells was studied using human adult epidermal keratinocytes cultured in a standard growth medium.
Schauss AG , Wu X , Prior RL , et al. Antioxidant capacity and other bioactivities of the freeze-dried Amazonian palm berry, Euterpe oleraceae mart. (acai) . J Agric Food Chem . 2006 ; 54 ( 22 ): 8604-8610 .
The role of phytosterols in cosmeceutical products.