You need as much sunscreen as a shot glass full.
To really protect your skin, you should use the shot glass size rule. This means that for one full application, you should be using about the same amount of sunscreen that would fit inside a full shot glass. This is a good way to remember just how much sunscreen to use, and that you need to use this amount for every single application.
There are two types of sunscreen.
Chemical and physical are the two types of sunscreen, which have different ingredients and uses. Chemical sunscreen contains ingredients like avobenzone, oxybenzone, and octinoxate. This type works like a sponge and absorbs the sun’s rays, and it is easier to apply. Physical sunscreen contains ingredients like zinc oxide and titanium dioxide – it is a true shield, reflecting UV rays and is great for more sensitive skin.
