What spf is optimal for summer in the middle lane?

What spf is optimal for summer in the middle lane?

Teen Acne: The BEST Products for Oily Skin

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answers (2)

Answer 1
April, 2021

There is no clear answer to this question, and here's why.

To begin with, there are three types of UVC radiation (absorbed by the ozone layer and does not reach the ground) / UVB (partially absorbed by the ozone layer, but reaches surface of the earth, are involved in photoaging can cause cancer) / UVA (active throughout the year, in any weather, glass, clouds and light clothing do not protect them from them - that is why you can sunbathe even on a cloudy day).

SPF (Sun Protection Factor) index - shows the theoretical degree of effectiveness against ONLY UVB RAYS, and does not say anything from UVA. That is, you could protect yourself from a direct burn, but the skin will still suffer.

MYTH - the number after SPF means an increase in the amount of safe exposure to the sun, that is, if I burn in 10 minutes and use SPF10, then 10x10 = one and a half hours of serene wallowing in the sun.

It is currently believed that a product with SPF 2 is capable of reflecting 50% of the rays, SPF6 - 83%, SPF10- 90%, SPF15 - 93%, SPF20 - 95%, SPF25 - 96%, SPF 30 - 97%, SPF 50 - 98%, SPF 100 - 99%.

There are also PA / PPD / IPD indices - just telling us about UVA protection.

Also, all funds are divided by composition into chemical filters and physical (titanium dioxide and zinc oxide). Products on chemical filters are not photostable, some are prohibited due to toxicity, and those that are not prohibited are not recognized as safe, the harm has simply been proven. When the sun hits the skin, on which a chemical filter is applied, a reaction occurs that affects the skin itself (at least - the generated heat raises the temperature of the skin).

In fact, the topic is very complex and extensive, I talked very chaotically and fragmentary some facts that, I hope, will be of interest and they will be Google for a better understanding, all the data is freely available.

IMPORTANT: sunscreen must be applied to clean skin. If you use it on a cream / serum and on top of a powder / foundation, it reduces the degree of protection.

How I do: I use SPF all year round, in the summer of Australian production (they know a lot about sun protection) with a factor of 50 , in winter, if not in the mountains - I can take a BB with protection, and always only on physical filters.

Answer 2
April, 2021

It is believed that it is best to use sunscreens with a filter of at least 30. I am fair-faced and white-skinned, I sunbathe very badly, or rather, I burn. Spent some money and bought a sunscreen with SPF 70.

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