What is D3D? What is D3 Introduction What is D3

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D3 is vitamin D3. Vitamin D3, also known as cholecalciferol, is a kind of vitamin D, and the 7-dehydrocholesterol produced after cholesterol dehydrogenation can be formed by ultraviolet irradiation to form cholecalciferol, so that is to say, the vitamin D provitamin D of cholecalciferol is 7-dehydrocholesterol.

Vitamin D3 is the active 7-dehydrocholesterol. 7-dehydrocholesterol is produced from the dermis of most higher animals upon ultraviolet irradiation. In fact, it is a prohormone, which is inactive and needs to be metabolized to 25-hydroxycholecalciferol in the liver and further hydroxylated in the kidneys before it can be active.

Vitamin D deficiency is related to intake and sunshine hours, so it is difficult to estimate exactly. In the case of the rise of problems such as ** cancer caused by ultraviolet radiation, Zheng Naichai said that the time for people in all countries to receive sunlight is decreasing, and many countries clearly stipulate that the time of receiving sunlight should be limited, so vitamin D is widely deficient worldwide.

Vitamin D3 has the following physiological functions:1. Improve the body's absorption of calcium and phosphorus, so that the level of plasma calcium and plasma phosphorus reaches a saturation degree.

2. Promote growth and bone calcification, and promote healthy teeth.

3. Increase phosphorus absorption through the intestinal wall and phosphorus reabsorption through the renal tubules.

D3 is Nikon D3.

The Nikon D3 continues Nikon's consistent dedication to the industry, with a good feel and excellent performance. It can meet the diverse needs of various customers, including professional users. The Nikon D3 has a built-in extra-large pentaprism for full-frame cameras to ensure effective framing.

Dual CF cards are used to improve the performance and stability of the storage system. The continuous shooting ability is strong, and the built-in GPS and virtual level functions are practical. However, noise is not sufficiently controlled in high light sensitivity.

Features:

The brain gate on the D3 contains a large pentaprism lens for full-frame cameras, giving the D3 a 100% field of view and bright framing. The 3-inch LCD is the most attractive, but even if it is such a large LCD, it will not look incongruous on the D3.

On the left side of the fuselage, there are various balance code interfaces, and you can also see how large the viewfinder part of the D3 is at this angle. On the right side of the fuselage, the lines on the handle are relatively simple, and there are not too many buttons. At the top of the fuselage, the button settings have not changed much.

The simple chassis eliminates the wireless transmission interface of D2XS.

Vitamin D3 is a kind of vitamin D, vitamin D3 can improve the body's absorption of calcium and phosphorus, promote growth and bone calcification, and saturate plasma calcium and plasma phosphorus. Vitamin D3 is also commonly used for vitamin D deficiency and**. However, vitamin D3 can not be eaten for a long time, only if the lack of vitamin D3 or symptoms appear, you need to change the dose, and the supplement must not be excessive.

D3 is vitamin D3.

Vitamin D3 (cholecalciferol) is a type of vitamin D that is formed by ultraviolet irradiation of 7-dehydrocholesterol produced by dehydrogenation of cholesterol. Vitamin D3 has the molecular formula C27H44O, which is a fat-soluble vitamin, and is also regarded as a hormone precursor that acts on calcium and phosphorus metabolism, and is mainly synthesized by the human body itself.

Vitamin D3 (cholecalciferol) is mainly synthesized by the human body itself, and the body's ** contains a kind of cholesterol, which becomes vitamin D3 after being exposed to sunlight. Therefore, if the child can fully receive direct sunlight** for more than 4-6 hours, the vitamin D3 synthesized by himself can basically be satisfied.

However, under the influence of the rise of ultraviolet radiation, air pollution, weather changes and other problems, the time for people in all countries to receive sunlight is decreasing, and many countries have clearly stipulated that the time of receiving sunlight must be limited, so vitamin D is widely deficient worldwide.

Industry Research on Vitamin D3::

The report first introduces the definition, classification, output value and application data of vitamin D3, and then introduces the industrial chain structure, market status and trend of vitamin D, and the current policy, and introduces the product parameters, manufacturing process, cost analysis, equipment materials and technology trends of vitamin D3.

Then, the 2009-2013 vitamin D3 production capacity, output, and market share of vitamin D3 were introduced, and the 2009-2013 vitamin D3 enterprise capacity and output utilization rate, China's proportion in the world, and the supply and demand relationship between the world and China, the gap, the cost, the profit margin, the import and export consumption, etc.

Then, the company name, company nature, major shareholders, establishment date, management team and background, products or services, customers or product applications, history or market position, expansion plan and detailed data of each company's output value, output, cost, profit margin and other details are detailed.

1. Vitamin D3 is a component of vitamin D, but vitamin D3 cannot be equated with vitamin D. Vitamin D is a general term for a class of substances with a structure similar to sterol derivatives. The pharmacologically active vitamins in vitamin D are vitamin D3 (cholecalciferol) and vitamin D2 (calciferol).

2. Vitamin D itself is inactive, and needs to be converted into active vitamin D2 and vitamin D3 under the action of sunlight or ultraviolet rays, which can increase the absorption of calcium and phosphorus in the small intestine and promote bone calcification. Generally, vitamin D preparations are marked with vitamin D3 content, but vitamin D3 cannot be equated with vitamin D.

Vitamin D is an essential vitamin for our human body, when we receive sunlight and rays, the human body will synthesize vitamin sedan d, everyone knows that vitamin D is a necessity for calcium supplementation.

Vitamin D3 as a kind of vitamin D, the importance is no less than vitamin D2, vitamin D3 also becomes cholecalciferol, lack of vitamin D3 will lead to calcium deficiency, so we should pay attention to vitamin supplementation in daily life, friends who need calcium supplementation should pay special attention to vitamin D3 supplementation, more outdoor activities, adequate access to sunlight, so as to absorb calcium in food well.

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