Coffee by-products can enhance the antioxidant properties of cosmetics–a review

However, the researchers stressed that a more detailed analysis is needed before it can be used in skin care products.

The study team, from Indonesia and Iran, argued that solid waste from the coffee pulp removal process threatens the environment because it produces organic pollutants.

On the flip side, evidence suggests that coffee byproducts can provide added value due to its ability as an antioxidant source.

They therefore conducted a systematic review to assess the antioxidant activity of coffee by-products obtained from Arabica and Robusta pulp, and methods for their processing.

One of the studies in the review comparing Robusta and Arabica coffee pulp with aqueous extract showed a higher antioxidant capacity in that of the Arabica variant.

However, a different result was shown by another study that compared the antioxidant activities of silver coffee grounds from both variables.

“The study found robusta coffee silver skin to have higher antioxidant activity as suggested by DPPH, ABTS, and FRAP assays.They wrote.

“The higher antioxidant efficacy of the robusta variant was also revealed by a study using green coffee extract.”

They also found that antioxidant activities can be affected not only by the variant, but also by the method of extraction or fermentation.

The data indicate that aqueous extract was found to be the most common processing method used to obtain antioxidants from various coffee by-products, followed by methanol and ethanol extract.

Furthermore, each coffee by-product can have different levels of antioxidant activity, with silver being shown to have the highest value.