Just as we require oxygen to breathe, the skin needs oxygen to remain pure and clear. Oxygen is believed to accelerate skin renewal and decrease the rate at which skin loses the important parts elastin and collagen. Oxygen also has anti-inflammatory effects, helping to calm and cure the skin. The very best oxygen containing skin care items are usually handmade, along with, as they don't contain preservatives, have to be refrigerated. Oxygen works to improve collagen density and skin firmness. Organic skin care products containing oxygen also needs to have a neutral pH which won't upset the skin's pH balance and cause irritation.