Moisturizing issue is an important factor and basic demand for every skin to stay smooth and hydrated. Generally, a moisturizing product can be divided into two categories which are Humectant and Emollient.
These components are commonly hydrophilic, mainly help the skin to catch moisture, easily evaporate and should be combined with the emollient to get a full moisturizing effect. The common humectant ingredients are Hyaluronic Acid, γPGA, Glycerin, Amino Acid,Collagen, Hydrolyzed Collagen, Lactic Acid, Pro-Vitamin B5, Natural Moisturizing Factor (NMF), Urea, Glycerols.
Generally it is an hydrophobic component, enable to retain moisture on the skin, reducing water loss from the skin for a long time and also repair the hydrolipdic film. It can be divided into animal, vegetable and synthetic oils base on its source. The common emollient are Squalene, Lanolin, Horse Oil, Mink Oil, Jojoba Oil, Almond Oil, Evening Primrose Oil, Wheat Germ Oil, Rosehip Oil, Grape Seed Oil, Petrolatum, Mineral oil.
In addition, different skin types need the different moisturizing products in different seasons. For example, dry skin should choose the product more nourish and oily skin should choose the product to balance the sebum. The keratinocytes will keep a transparent state when the water content of skin is enough, leaving a hydrated and translucent skin look.