Hyaluronic acid skin care products. If the levels of collagen and hyaluronic acid that fill the space between the skin cells decrease, the skin becomes loose and wrinkles appear. But nature can be fooled, and the fresh and youthful appearance of the skin - restored! In fact, we all know that water is the source of life. If we deprive our skin of its life energy, it loses vitality. As a natural constituent of the skin hyaluronic acid comes to help due to its extraordinary ability to hold up to 1,000 times its weight in water. With aging and depending on the way of life, the amount of this invaluable ingredient decreases, which reduces the water-retention capacity of the skin. Consequently, the skin loses its volume, and wrinkles appear. Collagen is also a key component of the skin, which makes skin tight and firm. Collagen's enemy number one are the collagenases - these are enzymes that are activated by the harmful environmental factors and stimulate collagen degradation. The result is sagging skin and the appearance of unwanted signs of aging. The combination of hyaluronic acid and collagen in REFAN’s series Hyaluronic acid improves skin elasticity and promotes skin tightening and facial contouring. Day and night cream have a soft and delicate texture that is quickly and easily absorbed and deeply hydrates skin making it softer, smoother and more elastic, and it helps restore its fresh, youthful and radiant appearance. For optimal results it is recommended to apply every day the combination of day and night face cream with hyaluronic acid.