Microcitrus Australis Fruit Extract Middel Antioxidant Anti-aging Microcitrus Australis Fruit Extract at a glance Fruit from the Australian round lime Natural source of AHAs Rich in antioxidant polyphenols Puts skin at risk for irritation Microcitrus Australis Fruit Extract description _Microcitrus australis_ fruit extract comes from a citrus fruit native to Australia. Among its many names are _Citrus australis_, dooja, round lime, Australian lime, and Australian round lime. There isn’t a breadth of research yet demonstrating round lime fruit’s benefits for skin. As a plant-derived ingredient it is a source of antioxidant-rich polyphenols that have anti-aging properties. It is also a source of natural alpha hydroxy acids (AHAs) that some cosmetics brands claim serve as a natural exfoliant. While this is true, a more well-researched AHA for exfoliation, such as mandelic, lactic, or glycolic acid, are better options. Another drawback is that, as a citrus fruit, round lime contains volatile fragrance components that give it its scent and taste. Those components put skin at risk for irritation. All told, it’s better to select a more tried-and-true AHA exfoliant that not only helps skin renew cells gently but has hydrating and collagen-supporting benefits as well. This ingredient is also used in a blend called Wildlime Harvest by Lucas Meyer Cosmetics that also includes glycerin, _Microcitrus australasica_ fruit extract, _Citrus glauca_ fruit extract, and water. The typical use level of this lime extract, when part of a blend, is 0.5%. Related ingredients: Microcitrus Australasica Fruit Extract Citrus Glauca Fruit Extract