In the hot summer, sun protection is the biggest problem, how to choose sunscreen has become a problem for everyone’s troubles.
1.How to choose sunscreen reasonably?
The former can penetrate the dermis, making the skin darker and more wrinkled, and the damage to the human body has a cumulative effect; the latter reaches the dermis, causing skin peeling, red spots and other phenomena, but it can be blocked by glass, umbrellas, clothing, etc..
Currently there are more sunscreen products on the market, so it is necessary to choose sunscreen products reasonably:.
① sunscreen can best choose UVA, UVB double protection.
② pay attention to the difference between physical and chemical sunscreen in sunscreen products, physical sunscreen products with large particles, coated thick, affecting the aesthetics, and the need for timely make-up; chemical sunscreen products with ingredients that may individual skin allergies, it needs to be used 20 minutes before going out. In addition to sunscreen products, good habits are also very important.
2, the higher the SPF value, the better?
SPF, also known as sun protection factor, it is calculated using the minimum amount of redness, for us yellow people, the skin can withstand the sun for an average of 15 minutes without being burned, then the use of SPF15 UV light protection products, there will be about 225 minutes of sun protection time. Generally speaking the higher the value, the longer the sun protection time, but it is not that the higher the SPF value the better, SPFl5 sunscreens can protect against 93% of medium wave UV rays, while SPF34 sunscreens can only protect against about 94% of medium wave UV rays. At the same time, the higher the sunscreen index, the stronger the greasiness, which can easily clog pores and affect the skin’s metabolism, resulting in symptoms such as acne or folliculitis.
You can use SPF 5-8 sunscreens for care, shopping and shopping, and SPF 10-15 sunscreens when you go out for fun. When swimming or sunbathing use SPF20-30 waterproof sunscreen. Of course, it also has to do with the season and time of year!
Several other aspects need to be noted.
① Indoor, cloudy days still need to be used.
②SPF values should not be cumulative.
③ Use 20 minutes before going out.
④ Usually the amount of sunscreen applied is 2 mg per square centimeter.
3, which sunscreen umbrella should be used?
Protection level mark should be carefully inspected. The State Administration of Quality Supervision, Inspection and Quarantine promulgated the “evaluation of textile UV protection performance” stipulates that only UPF (ultraviolet protection factor value) greater than 30, and UVA (long-wave ultraviolet) transmission rate of less than 5%, can be called UV protection products.
Nylon umbrella is not suitable as a sun umbrella, its sun protection effect is not as good as ordinary cotton umbrella. SPF (Sun Protection Factor) of cotton clothing is about 15 to 40.
4.What do I need to pay attention to in my life to protect myself from the sun in summer?
① eat green tea, tomatoes, lemons, watermelon, nuts, it is best not to eat light-sensitive vegetables, such as: celery, parsley, white radish.
② Wear cotton clothes.
Avoid going out from 10:00 am to 2:00 pm.
④Try to bring a sunshade, sun hat, sunglasses when going out wear long-sleeved clothes.
⑤Eating easy to light, can give chrysanthemum, wolfberry, lotus seeds, green tea, artemisia, scutellaria and other heat-clearing and anti-photosensitive Chinese herbal tea substitute.