It is sunscreen season and we should all wear sunscreen to protect our skin so we stay young and healthy. Technically we should be wearing it all year round but most people don't stay out long enough for it to matter or like me who don't see the sun because of my hours.
SPF stands for - Sun Protection Factor. So what does that mean?
It tells you how long you can stay in the sun without burning from UVB light.
If you burn under the sun in 30 minutes x 30 SPF = 900 minutes (15 hours) you can stay under the sun without burning.
Sounds great, right? But there are a number of factors that affect the calculation so it is not necessarily correct - like most of the time we don't put enough sunscreen on, depending on the time of the day because late afternoon is when the sun is the strongest, and how much sunscreen has been absorbed into your skin.
If you see the term "Broad Spectum" it means it protects your skin from both UVA and UVB
So the big question: Is there a difference between the SPF levels? We have seen SPF 30 to SPF 110. According to CBC's Marketplace there is really no difference but only increasing the protection by a few percent. SPF 30 gives you 96.7% protection and SPF 70 gives you 98.3%. Apparently, there is no sunscreen that gives you 100% protection and once applied, we need to re-apply because after a few hours it is gone. It's recommended to re-apply every two hours. Overall, there is no reason to spend the extra money for a SPF 110 where there is only a small difference. So you ask why do they make SPF 110? One answer is marketing. We all think higher SPF is better so we shell out the extra few bucks.
The video is a few years old but the theory is still the same.
What are your thoughts? Which SPF do you purchase?