15 SPF, 30 SPF, 50 SPF…1000 SPF?
So exactly how much sunscreen should you be using?
For the face 1 teaspoon
For the body, its 1 teaspoon each for each arm and each of the following, neck, upper back, lower back, upper front torso, lower front torso, right upper leg and thigh, left upper leg and thigh, left lower leg and foot, right lower leg and foot
When SPF is tested in the lab, it is used liberally on the skin, so if you apply just a thin layer of sunscreen, you are not getting the protection advertised on the label.