Sunscreen products contain an SPF of 2 and higher, SPF means Sun Protection Factor.
Sunblock creates a barrier between your skin and sun, and there can be two kinds of barriers: physical and chemical. Products higher than SPF 12 are sunblock. Most products are mixtures of physical and chemical barriers.
Difference between physical and chemical barriers.
Physical barrier is not absorbed by your skin; it just sits on the skin’s surface and protects your skin from UVA rays. Physical protectors, such as zinc oxide mineral, reflect UVA rays. Physical sunblock ingredients (UVA and UVB protection, non-irritating, non-allergenic)
A chemical barrier has the ability to be absorbed by the skin. Most chemical protectors absorb UVB rays. Meaning: the chemicals in the sunscreen absorb the UVB rays, so your skin does not do it, but stays in your blood stream.
Remember: Natural ingredients are accepted by the human body and synthesized through the skin more readily because the skin recognizes natural ingredients and responds more positively to non-intrusive alternatives. To find the safest sunscreens for you and your family, look for products that resemble food ingredients including a plant-based oil, green tea and vitamin E. Try to use a natural sunscreen this year and enjoy a healthy dose of vitamin D and fun in the sun without harmful chemicals!