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  2. Biological roles of the elements - Wikipedia

    en.wikipedia.org/wiki/Biological_roles_of_the...

    Selenium, which is an essential element for animals and prokaryotes and is a beneficial element for many plants, is the least-common of all the elements essential to life. [3] [63] Selenium acts as the catalytic center of several antioxidant enzymes, such as glutathione peroxidase, [11] and plays a wide variety of other biological roles.

  3. Composition of the human body - Wikipedia

    en.wikipedia.org/wiki/Composition_of_the_human_body

    The elements listed below as "Essential in humans" are those listed by the US Food and Drug Administration as essential nutrients, [9] as well as six additional elements: oxygen, carbon, hydrogen, and nitrogen (the fundamental building blocks of life on Earth), sulfur (essential to all cells) and cobalt (a necessary component of vitamin B 12).

  4. Mineral (nutrient) - Wikipedia

    en.wikipedia.org/wiki/Mineral_(nutrient)

    Some diversity of opinion exist about the essential nature of various ultratrace elements in humans (and other mammals), even based on the same data. For example, whether chromium is essential in humans is debated. No Cr-containing biochemical has been purified.

  5. Human nutrition - Wikipedia

    en.wikipedia.org/wiki/Human_nutrition

    Not essential in humans, but essential/beneficial for some non-human eucarya Main articles: Mineral (nutrient) and Composition of the human body Dietary minerals are inorganic chemical elements required by living organisms, [ 64 ] other than the four elements carbon , hydrogen , nitrogen , and oxygen that are present in nearly all organic ...

  6. Biometal (biology) - Wikipedia

    en.wikipedia.org/wiki/Biometal_(biology)

    Zinc was identified to be essential in fungal growth of yeast as shown by Jules Raulin in 1869 yet no proof for the need of zinc in human cells was shown until the late 1930s where its presence was demonstrated in carbonic anhydrase and the 1960s where it was identified as a necessary element for humans. [2]

  7. List of micronutrients - Wikipedia

    en.wikipedia.org/wiki/List_of_micronutrients

    1.1 Trace elements. 2 Vitamins. 3 See also. ... For human-specific nutrients, see Mineral ... (not accepted as essential nutrients) Alpha carotene;

  8. Nutrient - Wikipedia

    en.wikipedia.org/wiki/Nutrient

    Essential fatty acids (EFAs) are fatty acids that humans and other animals must ingest because the body requires them for good health but cannot synthesize them. [18] Only two fatty acids are known to be essential for humans: alpha-linolenic acid (an omega-3 fatty acid) and linoleic acid (an omega-6 fatty acid). [19]

  9. Copper in biology - Wikipedia

    en.wikipedia.org/wiki/Copper_in_biology

    Copper is an essential trace element that is vital to the health of all living things (plants, animals and microorganisms). In humans, copper is essential to the proper functioning of organs and metabolic processes.