Reapplying sunscreen

Sunscreen is a product that must be applied every day.

Physical blocking ingredients primarily block UVA rays. As the PA rating increases, the amount of physical blocking ingredients increases, while chemical blocking ingredients primarily block UVB rays. Since neither physical nor chemical ingredients are beneficial to the skin other than providing UV protection, you must apply sunscreen.

It is said that especially in the summer, it is better for the skin to reapply sunscreen with an SPF of around 30 every 2 to 3 hours. Raising the SPF above 50 often results in the addition of many chemical blocking ingredients, which can actually be harmful to the skin; sensitive skin, in particular, may experience allergic reactions to these chemicals. It would be best to reapply sunscreen frequently and utilize items such as hats and parasols.