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网页Build your own dungeons with hidden traps and monsters, bring your characters to life by customizing miniatures and upgrading them with items, or jump into a premade module! The closed beta kicks off this fall and all you need is a free D&D Beyond account. Read More. Grab Your Copy of the 2024 Player's Handbook Today. 14 hours ago by DND Staff.
维生素D - 维基百科，自由的百科全书
网页維生素D （英語： Vitamin D）是一種 親脂性 類固醇衍生物，為一種 激素 的前體，屬於 脂溶性 維生素，負責促進腸道對 鈣 、 鎂 和 磷酸鹽 的吸收，另外還有其他多種生物效應 [1]。 對人類而言，維生素D中最重要的化合物是維生素D 2 （麥角鈣化醇）和維生素D 3 （又稱為 膽鈣化醇） [2]。 維生素D對鈣元素在人體內的平衡和代謝中具有重要作用，可用以預防 佝僂病 和「成人骨軟化症」，與鈣質合用可以預防出現常見於老年人群的 骨質疏鬆症。 此外， …
D - Wikipedia
网页D, or d, is the fourth letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is dee (pronounced / ˈdiː /), plural dees. [1] History. The Semitic letter Dāleth may have developed from the logogram for a fish or a door. [2] .
D | Letter Development, History, & Etymology | Britannica
网页The Editors of Encyclopaedia Britannica. Article History. d. Related Topics: consonant. Roman numeral. letter. d, letter that has retained the fourth place in the alphabet from the earliest point at which it appears in history. It corresponds …
Vitamin D - Health Professional Fact Sheet - Office of Dietary ...
网页Vitamin D (also referred to as calciferol) is a fat-soluble vitamin that is naturally present in a few foods, added to others, and available as a dietary supplement. It is also produced endogenously when ultraviolet (UV) rays from sunlight strike the skin and trigger vitamin D …
Vitamin D - Wikipedia
网页Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, along with numerous other biological functions. [1] [2] In humans, the most significant compounds within this group are vitamin D 3 (cholecalciferol) and vitamin D 2 (ergocalciferol). [2] [3]
d - 抖音
网页d是拉丁字母和英语字母中的第4个字母，与俄语字母 的Д同源于希腊字母Δ。 在国际音标和汉语拼音中的意思各不相同。 在网络用语中的意思为“顶”，“最顶端”预示着追求最高的最好的。
Vitamin D Deficiency: Causes, Symptoms & Treatment - Cleveland Clinic
网页2022年8月2日 · Vitamin D deficiency means you don’t have enough vitamin D in your body. It primarily causes issues with your bones and muscles. Vitamin D is an essential vitamin that your body uses for normal bone development and maintenance. Vitamin D also plays a role in your nervous system, musculoskeletal system and immune system.
Vitamin D - Consumer - Office of Dietary Supplements (ODS)
网页What is vitamin D and what does it do? How much vitamin D do I need? What foods provide vitamin D? Can I get vitamin D from the sun? What kinds of vitamin D dietary supplements are available? Am I getting enough vitamin D? What happens if I don’t get enough vitamin D? What are some effects of vitamin D on health? Can vitamin D be harmful?
Vitamin D Deficiency: Symptoms, Treatments, and Causes - Healthline
网页2024年1月19日 · Vitamin D deficiency is common in Western countries. Learn more about the symptoms and causes of vitamin D deficiency, as well as how to treat it.
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