The Round Lab Birch Juice Moisturizing Cream protects the skin against transepidermal water loss, making it feel soft and supple. A lack of moisture can lead to a tight sensation of the skin and some irritations of the skin as well.Excellent at moisturizing the skin thanks to the Vita Hyaluronic Acid. It forms water barrier to protect the skin from losing moisture, Moisturization that lasts 48 hours. Completed skin irritation test. The colllagen moisture capsule type that is packed with the moisture of Silver Birch Sap and Vita Hylauronic Acids offers moisture supply and hydrating care. About Birch TreesBirch Trees are refreshingly tall, snow white, and has been nicknamed “the queen of the forest” due to their romantic images of unspoiled mountain streams and wintry nights. Their white skin, which can be preserved for over a thousand years, sheds into more than ten thinner layers that can be repurposed as “paper” in the old ages. Its roots, sap, and even the mushrooms living off these trees were commonly used for medical purposes. In the spring, before the leaves have sprouted, Birch tree sap is harvested with a small hole, bleeding its “white sap” that has a slightly sweet flavor and is rich with NMF (Natural Moisturizing Factor, a cocktail of ingredients that the skin naturally creates to keep the stratum corneum hydrated. These include Amino Acids, Lactic Acid, Pyrrolidone Carboxylic Acid (PCA), and Hyaluronic Acid).