Sunscreen or sun block lotion is applied to reduce the damage caused to skin by exposure to sun. It reduces the damage caused to skin by blocking ultraviolet radiation from the sun. Sunscreen lotion contains either an opaque material that reflects light or an organic chemical compound that absorbs ultraviolet rays such as oxybenzone. It is applied ...
A person will never know if they are allergic to a certain type of food unless they have eaten the food allergen itself. It takes a certain amount of food for the reaction to take place and trigger a symptom.