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Related Concept Videos

Vitamins01:30

Vitamins

Vitamins, derived from the Latin word for life, are essential organic substances required in small quantities for optimal growth and overall well-being. Unlike other organic nutrients, vitamins don't act as sources of energy or building materials but rather facilitate these nutrients' utilization by the body. Vitamins are predominantly coenzymes, assisting enzymes in specific chemical actions, like the oxidation of glucose for energy involving B vitamins. Most vitamins are not produced in our...
Bioavailability: Overview01:13

Bioavailability: Overview

Bioavailability refers to the proportion of an unaltered drug that, after administration, enters the systemic circulation and can be distributed to the desired action site. Factors such as gastrointestinal (GI) absorption and liver biotransformation influence the bioavailability of a drug when it is administered orally. When a drug is administered intravenously, it enters the systemic circulation directly; by definition, its bioavailability is assumed to be 100%. The bioavailability of an...
Bioavailability: Overview01:17

Bioavailability: Overview

Bioavailability refers to the proportion of an administered drug that reaches the systemic circulation in its active, unaltered form. It is a crucial pharmacokinetic parameter that determines the effectiveness of a drug in achieving its intended therapeutic outcomes. The route of administration significantly influences bioavailability, with intravenous administration achieving 100% bioavailability as the drug directly enters the bloodstream. In contrast, oral administration often results in...
Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants01:18

Anticoagulant Drugs: Vitamin K Antagonists and Direct Oral Anticoagulants

Oral anticoagulants are vital tools in preventing and treating blood clotting disorders. This diverse class of medications can be categorized as vitamin K antagonists, exemplified by warfarin, and direct thrombin inhibitors (DTIs), such as dabigatran, as well as factor Xa inhibitors, including rivaroxaban.
Warfarin, a prominent vitamin K antagonist family member, exerts its effect by inhibiting the enzyme VKORC1 (vitamin K epoxide reductase complex 1). By hindering this enzyme, warfarin...
Lipids: Dietary Sources and Requirements01:18

Lipids: Dietary Sources and Requirements

Lipids are an essential component of a balanced human diet. Triglycerides, which make up the majority of dietary lipids, are found in both saturated fats—commonly present in meat, dairy products, and certain tropical plants like coconut, and hydrogenated oils such as margarine and baking shortenings (trans fats)—and unsaturated fats, which are abundant in seeds, nuts, olive oil, and most vegetable oils. The main sources of cholesterol include egg yolks, various meats and organ meats, shellfish,...
Lipid-derived Compounds in the Human Body01:31

Lipid-derived Compounds in the Human Body

Fats and lipids are crucial components in the human body. Some lipid-derived compounds, such as fat-soluble vitamins, eicosanoids, lipoproteins, and glycolipids, also play unique roles to support various  biological processes .
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin, delayed...

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Related Experiment Videos

An update on vitamin E, tocopherol and tocotrienol-perspectives.

Maria Laura Colombo1

  • 1Department of Drug Science and Technology, University of Torino, via Pietro Giuria 9, Torino, Italy. marialaura.colombo@unito.it

Molecules (Basel, Switzerland)
|April 30, 2010
PubMed
Summary

Vitamin E compounds, including tocotrienols and tocopherols, are vital for animal cells and synthesized by plants. Natural forms show promise for cardiovascular health and cholesterol management, with potential differences in antioxidant effects compared to synthetic sources.

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Area of Science:

  • Biochemistry
  • Plant Science
  • Nutritional Science

Background:

  • Vitamin E, encompassing tocotrienols and tocopherols, comprises essential compounds for animal cellular function.
  • Photosynthetic eukaryotes and cyanobacteria are the sole producers of Vitamin E.
  • Plants accumulate tocochromanols in seeds, fruits, and young tissues to inhibit lipid oxidation.

Purpose of the Study:

  • To explore the significance of natural tocochromanols (Vitamin E) in human health.
  • To investigate the potential of tocochromanols in supporting cardiovascular health and managing blood cholesterol.
  • To examine the differential antioxidant potencies between natural and synthetic tocochromanols.

Main Methods:

  • Literature review on Vitamin E synthesis and function.
  • Analysis of studies investigating tocochromanol effects on cardiovascular markers.
  • Comparative assessment of antioxidant activities from various sources.

Main Results:

  • Natural tocochromanols are recognized for their health benefits, particularly for the cardiovascular system.
  • Evidence suggests potential variations in antioxidant efficacy between naturally occurring and synthetically derived tocochromanols.
  • Plants synthesize these compounds to protect lipids from oxidation.

Conclusions:

  • Natural Vitamin E forms, like tocotrienols, are of significant interest for their health-promoting properties.
  • Further research is warranted to elucidate the distinct antioxidant capacities of natural versus synthetic tocochromanols.
  • Tocochromanols play a crucial role in plant defense against lipid oxidation and offer potential therapeutic applications.