UVA vs. UVB
The sun radiates two types of UV rays: UVA and UVB. Accounting for more than 90% of the UV radiation reaching the earth’s surface, the UVA light penetrates the skin deeply and hence holds the bigger responsibility in stimulating premature aging. But that doesn’t mean it’s not central to protect our skin from the UVB light regardless of its superficial penetration in the skin.
It is important to note that while UVB light is blocked by the glass in our homes, UVA light still penetrates which is why sunscreen should also be applied at home.
Sunscreen vs. Sunblock
The difference between sunscreen and sunblock translates in the formulation of each product. A sunblock, such as the Sunstop, forms a protective shield on the skin’s surface and reflects the UV rays obstructing them from penetrating the skin altogether. It is usually thick in consistency and has a strong white color.
Whereas a sunscreen, penetrates the skin and absorbs the sun rays before it damages the skin and transforms it into heat. It is usually easier to apply because it is thin in consistency and colorless.
SPF vs. Star ratings
The star rating ranging from 0 to 5 measures the level of protection from UVA light. The higher the star rating the better. The best recommended star rating is 4.
On the other hand, SPF measures how well the sunscreen or sunblock protects the skin from UVB light. It is essential to say that the higher SPF does not guarantee higher protection, you will need to reapply it every 2 hours regardless of the SPF value.
Finally, people with skin conditions should avoid products that contain fragrances, preservatives and para-aminobenzoic acid (PABA). The main ingredients of Sunstop sunscreen available on Youth and Age are Zinc Oxide, Oxybenzone and Vitamin E.