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White shiny bacterial colonies of different sizes grown on brown nutrient agar.

Vitamin B12, also known as cobalamin, is a water-soluble vitamin involved in metabolism. It is one of eight B vitamins. It is required by animals, which use it as a cofactor in DNA synthesis, and in both fatty acid and amino acid metabolism. It is important in the normal functioning of the nervous system via its role in the synthesis of myelin, and in the circulatory system in the maturation of red blood cells in the bone marrow. Plants do not need cobalamin and carry out the reactions with enzymes that are not dependent on it.

An electron image of several nanoparticles made of lipids (liposomes) containing an anticancer drug (doxorubicin)

Growth of Staphylococcus. Sputum Culture in blood agar media.

Nucleus cell organelle. Could be a virus or some kind of microorganism

Bacterial colonies emerged on agar plate

Cholesterol is an organic molecule and a structural component of all animal cell membranes. It also serves as a precursor for the biosynthesis of several steroid hormones and bile acids. Cholesterol and other lipids transported in the LDL particles seem to promote atherosclerosis.

$Protein molecules form crystals by arranging themselves in a regular pattern. Their shape is like a transparent gem and attracts many scientists. Protein crystal structures are an important area of research that can provide clues for drug discovery. This image is reminiscent of a protein crystallising in solution.\nThis image was not created by AI.$

Vitamin D is a group of fat-soluble secosteroids responsible for increasing intestinal absorption of calcium, magnesium, and phosphate, and many other biological effects. In humans, the most important compounds in this group are vitamin D3 (cholecalciferol) and vitamin D2 (ergocalciferol).

$WHO says that it is estimated that ETEC causes about 220 million diarrhoea episodes globally, with about 75 million episodes in children under 5 years of age, resulting in between 18 700 and 42 000 deaths in children younger than 5 years. Several vaccines are in the pipeline.\nETEC is also a very common cause of traveler's diarrhea, this infection is usually self limiting, with no need for antibiotics. ETEC is common in developing countries.$

Cultivation of bacteria of the species Escherichia coli in selective medium

Bacteria Lactobacillus in human intestine,Beneficial healthy intestinal bacterium microflora,Gut bacteria

An electron image representing nanoparticles made of lipids (liposomes) containing an anticancer drug (doxorubicin)

Blood clot, coagulation. 3D illustration.Blood clot, coagulation. 3D illustration.

Riboflavin, also known as vitamin B2, is a vitamin found in food and sold as a dietary supplement. It is essential to the formation of two major coenzymes, flavin mononucleotide and flavin adenine dinucleotide. These coenzymes are involved in energy metabolism, cellular respiration, and antibody production, as well as normal growth and development. The coenzymes are also required for the metabolism of niacin, vitamin B6, and folate. Riboflavin is prescribed to treat corneal thinning, and taken orally, may reduce the incidence of migraine headaches in adults.

Virus bacteria background. 3d illustration. 3d illustration

A hand holding a culture of Staphylococcus aureus on a jelly agar.

Light microscope micrograph showing the limit between sclera (bottom) and choroid (top). The inner layer of sclera has pigmented cells (lamina fusca or suprachoroid lamina).

Mixed culture of Candida albicans (turquoise) and Candida glabrata (yellow) colonies grown on a diagnostic chomogenic agar plate. Life-threatening invasive fungal infections are becoming increasingly common in immunocompromised patients.

An electron image represents several nanoparticles made of lipids (liposomes) containing an anticancer drug (doxorubicin)

Bead, Glass - Material, Backgrounds, Pattern, Abstract,glass beads

Glycoprotein bilayer cell membrane cross section and its ion channel (3D Rendering)

Yeast cells - 3d rendered image SEM (scanning electron micrograph) view of cells of brewer's yeast (Saccharomyces cerevisiae). It is used in the production of beer, wine and bread.

Vitamin E is a group of eight fat soluble compounds that include four tocopherols and four tocotrienols. Vitamin E deficiency, which is rare and usually due to an underlying problem with digesting dietary fat rather than from a diet low in vitamin E, can cause nerve problems. Vitamin E is a fat-soluble antioxidant which may help protect cell membranes from reactive oxygen species. Worldwide, government organizations recommend adults consume in the range of 3 to 15 mg per day. As of 2016, consumption was below recommendations according to a worldwide summary of more than one hundred studies that reported a median dietary intake of 6.2 mg per day for alpha-tocopherol.

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