Superoxide Dismutase and Soybean Peroxidase help convert oxygen to moisture to help maximize the tanning process and increase hydration. Highest levels of Unipertan P-2002 enhance the tanning process for maximum tanning results. Dual-acting DHA self-tanning bronzers and Black Walnut Shell Extract allow skin to further darken after UV exposure for deeper, longer-lasting streak-free color.