Why Is Lipid Oxidation Bad?

What is oxidation in meat?

Exposure to light and oxygen causes oxidation to take place, which causes the breaking down of color pigments formed during the curing process.

Curing solutions are colored in order to distinguish them from other ingredients (such as sugar or salt) used in fresh and cured meat products..

What does oxidation mean?

Oxidation is any chemical reaction that involves the moving of electrons. Specifically, it means the substance that gives away electrons is oxidized. … Oxidation and reduction together are called redox (reduction and oxidation). Oxygen does not have to be present in a reaction for it to be a redox-reaction.

What happens when lipids are oxidized?

Lipid oxidation is a process that results in rancidity and deterioration of fats and progresses via free-radical propagated chain reactions.

What causes lipid peroxidation?

Lipid peroxidation is a process generated naturally in small amounts in the body, mainly by the effect of several reactive oxygen species (hydroxyl radical, hydrogen peroxide etc.). It can also be generated by the action of several phagocytes.

What causes oxidative stress?

Oxidative stress is a phenomenon caused by an imbalance between production and accumulation of oxygen reactive species (ROS) in cells and tissues and the ability of a biological system to detoxify these reactive products.

How do you recognize lipid oxidation?

Lipid oxidation can be roughly estimated by measuring the UV absorption at 234 nm (conjugated dienes) and 268 nm (conjugated trienes) (Vieira and Regitano-d’Arce, 1999).

Is lipid peroxidation good or bad?

The lipid peroxidation (LPO) products are highly reactive and display marked biological effects, which, depending upon their concentration, cause selective alterations in cell signaling, protein and DNA damage, and cytotoxicity.

What is the initial phase of lipid oxidation called?

Oxidation involves three stages: initiation, propagation and termination (Figure 1). In the initiation stage, a free radical attacks the lipid, abstracting an allyl hydrogen atom and generating an allylic radical (R n *).

What is oxidative stress in simple terms?

Oxidative stress is a state that occurs when there is an excess of free radicals in the body’s cells. The body produces free radicals during normal metabolic processes. Oxidative stress can damage cells, proteins, and DNA, which can contribute to aging.

What is the difference between oxidation and peroxidation?

As nouns the difference between oxidation and peroxidation is that oxidation is the combination of a substance with oxygen while peroxidation is (chemistry) any oxidation reaction, especially of an oxide, that produces a peroxide.

What is a lipid and what does it do?

A lipid is a term for a fat or fat-like substance in the blood. The body stores fat as energy for future use, just like a car that has a reserve fuel tank. When the body needs energy, it can break down lipids into fatty acids and burn them like glucose.

What are the causes of free radicals?

Free Radicals Due to Exposure to CarcinogensTobacco smoke.Ultraviolet radiation.Radon in the home.Environmental and occupational substances and chemicals such as asbestos and vinyl chloride.Some viruses.Medical radiation.Air pollution.

What does lipid oxidation mean?

Generally, lipid peroxidation occurs when a hydroxyl radical abstracts an electron from an unsaturated fatty acid. This creates an unstable lipid radical, which can react with oxygen, forming a fatty acid peroxyl radical.

Why is lipid peroxidation important?

Lipid peroxidation-derived aldehydes play a major role in human health and disease as they act as important signaling intermediates in modulating cellular physiological function via regulating various transcription factors (Fig. 32.6).

How do you reduce lipid oxidation?

Manufacturers can slow lipid oxidation and extend their product’s shelf life by controlling just two factors: water activity and temperature.