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Related Concept Videos

Structure of Lipids03:38

Structure of Lipids

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Lipids include a diverse group of compounds that are largely nonpolar in nature. This is because they are hydrocarbons that include mostly nonpolar carbon-carbon or carbon-hydrogen bonds. Non-polar molecules are hydrophobic (“water fearing”), or insoluble in water. Lipids perform many different functions in a cell. Cells store energy for long-term use in the form of fats. Lipids also provide insulation from the environment for plants and animals. For example, they help keep aquatic...
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Structure of Lipids03:38

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Overview of Fatty Acid Metabolism01:28

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Lipids also are sources of energy that power cellular processes. Like carbohydrates, lipids are composed of carbon, hydrogen, and oxygen, but these atoms are arranged differently. Most lipids are nonpolar and hydrophobic. Major types include fats and oils, waxes, phospholipids, and steroids.
Fatty acids are catabolized in a process called beta-oxidation, which takes place in the matrix of the mitochondria and converts their fatty acid chains into two-carbon units of acetyl groups. The acetyl...
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Lipids: Dietary Sources and Requirements01:18

Lipids: Dietary Sources and Requirements

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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...
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What are Lipids?01:38

What are Lipids?

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Overview
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What are Lipids?01:31

What are Lipids?

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Lipids function as structural components of cellular membranes, in addition to acting as energy reservoirs and signaling molecules. They are thus crucial to all living organisms.  The three biologically important classes of lipids are triglycerides, phospholipids, and steroids.
Non-Polar and Hydrophobic Characteristics of Lipids
Lipids are a structurally and functionally diverse group of hydrocarbons—compounds consisting of carbon and hydrogen atoms. The carbon-carbon and...
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Measuring Oral Fatty Acid Thresholds, Fat Perception, Fatty Food Liking, and Papillae Density in Humans
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Fatty acids: facts vs. fiction.

Reinhard Waehler1

  • 1TISSO Naturprodukte GmbH, Wenden, Germany.

International Journal for Vitamin and Nutrition Research. Internationale Zeitschrift Fur Vitamin- Und Ernahrungsforschung. Journal International De Vitaminologie Et De Nutrition
|May 27, 2021
PubMed
Summary

Dietary fat guidelines are changing. Recent research suggests saturated fats are beneficial, while processed fats and certain trans fats may be harmful. Balancing omega-3 and omega-6 fatty acids is key for health.

Keywords:
fish oil quality and dosageomega-3 indexsaturated fatty acidsstatinstrans fatty acids and conjugated linoleic acidω3 and ω6 fatty acidsω7 fatty acids

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Area of Science:

  • Nutrition Science
  • Biochemistry
  • Dietary Recommendations

Background:

  • Official dietary guidelines over the past century have promoted seed-derived fats and discouraged traditional fats, particularly saturated fats.
  • Recent studies challenge these long-standing recommendations, highlighting potential health detriments from highly refined fats.
  • The extensive body of high-quality research on fatty acids now allows for evidence-based clinical and practical recommendations.

Purpose of the Study:

  • To re-evaluate the role of various dietary fats, including saturated, trans, omega-3, and omega-6 fatty acids, in human health.
  • To provide updated recommendations for the clinical application and everyday consumption of fats based on current scientific evidence.
  • To clarify the specific conditions under which certain fatty acids may be beneficial or harmful.

Main Methods:

  • Review and synthesis of a large number of high-quality studies on fatty acids.
  • Analysis of the health effects of different types of fats, including saturated fats, trans fatty acids (artificial vs. natural), conjugated linoleic acid, linolenic acid (omega-3), and linoleic acid/arachidonic acid (omega-6).
  • Consideration of factors such as processing methods, isomer composition, and the balance between omega-3 and omega-6 fatty acids.

Main Results:

  • Saturated fats possess beneficial functions; palmitic acid is problematic mainly when synthesized due to excess fructose.
  • Artificial trans fatty acids are harmful, whereas naturally occurring trans fats are beneficial.
  • Conjugated linoleic acid supplements may differ from natural forms and should be used cautiously. Linolenic acid (omega-3) has limited anti-inflammatory effects.
  • Long-chain omega-3 fatty acids show promise in clinical applications, potentially replacing or supplementing pharmacological treatments.
  • Omega-6 fatty acids (linoleic and arachidonic acid) are physiologically important and should not be avoided but balanced with long-chain omega-3s.

Conclusions:

  • Current dietary fat recommendations require revision based on emerging evidence.
  • The quality, quantity, and balance of dietary fatty acids, alongside adequate antioxidant intake, are crucial for optimal health outcomes.
  • Personalized approaches, such as blood analysis for long-chain omega-3s, can guide effective fat supplementation strategies.