After cleansing, after application of serums and anti-aging products, apply a thin layer to the skin as needed.
Skincare Science does not claim SPF on its Anti-Age Protect. Sun exposure is the leading cause of skin damage and loss of collagen which leads to a decrease in the thickness of the dermal layer and an increase in the visible signs of aging. Skincare Science does not advocate the use of sunscreens because they are often not applied correctly and give a false sense of protection. Skincare Science advises complete sun protection through the use of clothing or protective cover (i.e. umbrella or face shield). Further more, SPF ingredients are known to cause skin inflammation and this inflammation will cause increased damage to the skin and thus speeds up the aging process and does not slow it.
The research is out there - Researchers warn that prolonged use of TiO2 nanoparticles would lead to significant skin aging as the nanoparticles significantly reduced the collagen content of the skin.” (Sunscreen: Biohazard, pg. 90) A simple online search will reveal information substantiating this claim and Skincare Science advocates all its clients to look into this topic.