This Vitamin A & C serum is amazing for tightening fine lines and wrinkles, reducing puffy eyes, and helps with dark circles around eyes. Cellular regeneration is the key to youthful skin and essential oils provide a pleasant way of doing this. The nutrients and proteins found in essential oils help to maintain the elasticity of skin, upon which the outer layers of skin rest, and encourage the regeneration of new cells. The stimulating properties of the oils help oxygenate the blood, which in turn energizes the cells, allowing regeneration to take place. Certain oils contain hormonal like properties, which encourage the firming of the skin, giving it a more youthful appearance.