Alpha-hydroxy acids (AHAs) are commonly found and isolated from fruits of all sorts. That is why they are referred to as Fruit Acids.
First, they can act as a simple humectant that absorbs moisture from the atmosphere. When applied to the skin, these hydrated AHAs act to increase the water content of the skin and thus moisturize the outer layer of the epidermis (the stratum corneum) and consequently make the skin softer and more flexible.
Second method by which AHAs are thought to act by an exfoliating action resulting their ability to break the bonds between dead skin cells that form at the surface of the skin. Skin normally has a dead layer of cells at its surface (the corneocyte layer), and AHAs can speed up the normal process of skin cell regeneration and sloughing. This results in increased flexibility of the skin as well as decreased formation of large dry skin flakes at the surface of the skin. AHAs have been shown to promote smoother, younger looking skin.
Origin: Natural, plant based.