zo skin health provides a comprehensive range of solutions that will restore skin to a healthy state. dr zein obagi has been revolutionizing the world of skincare for over 3 decades. zo products work from the inside out. when over the counter products are applied to the skin surface, they do not pass through the dermal epidermal layer of the skin barrier. zo products contain highly active ingredients that pass through the epidermis and work effectively deep within the dermis. over the counter products typically address the skin surface without improving cellular function or overall skin condition. zo products are based on highly active ingredients that improve the function of the skin and prevent premature ageing.

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