1, prepare sunscreen
Do a good job in sun protection, and sunscreen is also one of the essential items. When the sun exposure time exceeds the effective sun protection time, it should be supplemented and smeared in time.
2. Umbrella and hat
In summer, a certain shade can prevent us from tanning and sunburn. So when you go out in summer, you must pay attention to protective measures such as umbrellas, sun hats or long-sleeved clothes.
Sunshade umbrellas must be UV-proof. Don't choose umbrellas that can be used for both sunny and rainy purposes, because most umbrellas rely on sunscreen coatings. If you make an umbrella again, the sunscreen coating will be washed off easily, and the sunscreen effect will not be achieved.
3. supplement vitamin C.
The whitening effect of vitamin C is obvious. Want to whiten, a certain degree of internal adjustment is also essential. Usually try to eat foods rich in vitamin C such as tomatoes, cucumbers, water spinach, milk, seafood and so on. Keep your skin naturally white during dieting.
4. Avoid red and black food.
Nutritionists show that after eating red food and basking in the sun, the skin is more likely to get tanned. Therefore, try not to eat red food such as carrots and papaya before exposure.
In addition, black food such as soy sauce, black vinegar, coffee and so on. Because they contain more melanin, eating too much can easily lead to pigmentation of the skin and make the skin black, so try to eat less.
Step 5 avoid sensitive food
Photosensitive food can directly or indirectly increase the quantity and activity of melanin-producing related substances. Eating more photosensitive foods will make the skin more vulnerable to ultraviolet rays and turn black or long spots.
Common photosensitive foods are lemon, carrot, papaya, celery, lettuce, potato, coriander, amaranth, rape, orange, laver, snail, spinach, fig, nine-story tower, leek and red bean.
Extended data:
1, the SPF value of sunscreen is not as high as possible.
SPF value refers to the product's ability to protect against UVB, that is, the ability to prevent skin sunburn. Generally speaking, it takes 20-25 minutes for human skin to produce erythema under direct sunlight. For example, the SPF value of a bottle of sunscreen lotion is 8, and once applied, the skin care time is about 20(25)×8= 160(200) minutes.
What kind of sunscreen to choose depends on your workplace, time and sunshine intensity. If you work indoors and there are not many outdoor activities, it is recommended to use SPF 15-SPF20 sunscreen products. If you need to go out to work or travel on holidays, you can use products with SPF20 above. If you travel to the beach or tropical areas, you should choose sunscreen products with SPF30 above.
2, sunscreen is not as thick as possible.
Only when the skin reaches the required dose of 2 mg per square centimeter can the sunscreen reach its marked SPF. Even if the sunscreen exceeds SPF30, it is only coated with a thin layer, which is probably only SPF4' s sunscreen effect. If you can't guarantee your own sunscreen dose, it is recommended to choose products with high SPF and PA values.
Sweat and friction can make sunscreen run off, so you need to apply sunscreen every two hours when you are outdoors.
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