Despite the fact that hyaluronic acid is already found in our skin and bodies, a hyaluronic acid serum should be included in your skincare routine. Our skin grows progressively dry and loses moisture as we grow older and travel through life. Skin loses firmness as it ages, becomes less elastic, and appears dry. A hyaluronic acid anti-aging facial serum can replenish the moisture that aging skin lacks, improve the appearance of fine wrinkles, and smooth the skin.