Most of the vitamin D in the human body is derived from ultraviolet rays. If it is sunscreen, will vitamin D be insufficient?
In the US National Health and Nutrition Survey 2003-2006, the researchers surveyed 5,920 adults aged 16-60, showing that Caucasians often have a risk of vitamin D deficiency in the shade or wearing long-sleeved clothes. And frequent use of sunscreen products does not cause vitamin D deficiency. This result is not difficult to understand - avoiding the sun is actually a very important means of sun protection, and the use of sunscreen is a complementary means.
The World Health Organization's recommendations for UV protection are to emphasize direct sunlight, long-sleeved clothing, sunglasses and hats, and then use a sufficient amount of sunscreen. On the one hand, because ultraviolet rays are reflected through the ground and lake buildings, they are exposed to the body or the parts that are not covered by the face; on the other hand, sunscreen does not block 100% of ultraviolet rays. For example, SPF15 can only block 93% of ultraviolet rays. SPF50 can only block 98% of UV rays.
Then, since sunscreen is necessary, sunscreen must also be applied, but some sunscreen "cold knowledge" may be ignored by you.
Indoors also need sunscreen
Everyone thinks that office workers spend most of their time in the office, only need to use sunscreen with low sun protection factor; you need to use high-yield sunscreen when you are shopping in the hot sun and going out to play. In fact, it is not entirely true. UVA has a strong penetrating power and can penetrate the glass windows of the office to cause damage to the skin. And the office workers are not always in the room, and will be exposed to the "light pollution" of the sun and high-rise buildings when they go to work. Therefore, we recommend that you should also use a sunscreen with a high PA index to fight against persistent UVA damage. Going out on vacation, especially going up the mountain and going to the sea, can't relax your vigilance.
On a rainy day, don't you sunscreen?
In addition, rainy days and cold winters are also periods that are easily overlooked by everyone. At these times, although the amount of UVB is reduced, the UVA is still very "squeaky". UVA has a strong penetrating power, even with the cover of clouds and glass, it can still reach 95% of the sun at the highest. Therefore, even in rainy days and winters, you can't be lazy to ignore sunscreen. If you go skiing in the winter, pay more attention to the protection of your face.
Basic sun protection recommendations:
nutrition
Avoid exposure to the sun: The sun's ultraviolet rays are strongest between 10 am and 4 pm. The amount of time spent in the sun should be minimized during these hours.
Use shades wisely: When UV is the strongest, the most important thing is to look for shade. (Of course, trees, umbrellas or awnings can't cover all the sunlight.) Remember: "Keep your shadows - the shadows are too short, you should look for the sun!"
Wear protective coat and sunglasses: The wide-brimmed hat provides a shade of light to the eyes, ears, face, back and neck. Sunglasses that filter almost 100% UVA and UVB can greatly reduce eye damage to the eyes. The dense, loose clothing provides extra protection for the body (the chiffon and tulle shading effect will be greatly reduced).
Shiseido Anzesa Sunscreen Lotion RMB280 SPF30+·PA+++
It has a strong waterproof effect and is especially suitable for use in strong ultraviolet radiation such as seaside and swimming. The texture is hydrated and light, and the use is comfortable. It has excellent sun protection, waterproof and anti-sweat design, and it is not easy to remove makeup. Anti-drying design leaves skin moisturized in the sun.
Aquarium Air Pump
There are two main parameters of Air Pump in aquarium: gas volume and power. in generally speaking, the two parameters are related, with high power and large gas volume. The larger the air volume, the deeper the water depth can be used in the aquarium Fish Tank. The shallow water and the air pump with large air volume will splash water. The air pump with small air volume can be used in the fish tank with deep water depth, and the bubbles will be relatively small or even not give out air. Similarly, the larger the gas volume, the louder the vibration sound, and the smaller the gas volume, the quieter it is. The suggestion of air selection pump is to give priority to air pumps with adjustable air volume. Generally speaking, the air volume of these air pumps will be more than 1.5l/min, but it can be adjusted by manual knob.
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