Polyunsaturated fat

polyunsaturatedpolyunsaturated fatty acidspolyunsaturated fatspolyunsaturated fatty acidpolyunsaturates71%poly-unsaturatedpolyunstaturated fatty acid
Polyunsaturated fats are fats in which the constituent hydrocarbon chain possesses two or more carbon–carbon double bonds.wikipedia
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Fat

greasetotal fatdietary fat
Polyunsaturated fats are fats in which the constituent hydrocarbon chain possesses two or more carbon–carbon double bonds.
Some oils and fats have multiple double bonds and are therefore called polyunsaturated fats.

Omega-3 fatty acid

omega-3omega-3 fatty acidsomega 3 fatty acid
Omega-3 fatty acids have a double bond three carbons away from the methyl carbon, whereas omega-6 fatty acids have a double bond six carbons away from the methyl carbon. In preliminary research, omega-3 fatty acids in algal oil, fish oil, fish and seafood have been shown to lower the risk of heart attacks.
Thus, α-linolenic acid is a polyunsaturated n−3 (omega-3) fatty acid with lipid number, 18:3 (18 carbon atoms, 3 double bonds).

Linoleic acid

linoleiclinoleatelinoleic acid metabolism
The illustration below shows the omega-6 fatty acid, linoleic acid.
LA is a polyunsaturated fatty acid used in the biosynthesis of arachidonic acid (AA) and thus some prostaglandins, leukotrienes (LTA, LTB, LTC), and thromboxane (TXA).

Perilla oil

Perilla seed oilperillaseed oil
The most common ones are linseed (flax seed) oil, tung oil, poppy seed oil, perilla oil, and walnut oil.
Monounsaturated fatty acids in perilla oil are oleic (12-22%), while polyunsaturated fatty acids in perilla oil are linoleic (13-20%), gamma-linolenic (0-1%), alpha-linolenic (54-64%), and arachidic (0-1%).

Sunflower oil

sunflowersunflower seed oilhigh oleic sunflower oil
Other preliminary research indicates that omega-6 fatty acids in sunflower oil and safflower oil may also reduce the risk of cardiovascular disease.
Sunflower oil is a mixture mainly of the polyunsaturated fat, linoleic acid (59% of total), and the monounsaturated fat, oleic acid (30% of total).

Myocardial infarction

heart attackheart attacksacute myocardial infarction
In preliminary research, omega-3 fatty acids in algal oil, fish oil, fish and seafood have been shown to lower the risk of heart attacks.
Eating polyunsaturated fat instead of saturated fats has been shown in studies to be associated with a decreased risk of myocardial infarction, while other studies find little evidence that reducing dietary saturated fat or increasing polyunsaturated fat intake affects heart attack risk.

Varnish

varnishesvarnishingcopal varnish
These oils are used to make paints and varnishes.
These contain high levels of polyunsaturated fatty acids.

Drying oil

drying oilsdryingoil
Drying oils, which polymerize on exposure to oxygen to form solid films, are polyunsaturated fats.
These esters are characterized by high levels of polyunsaturated fatty acids, especially alpha-linolenic acid.

Saturated fat

saturatedsaturated fatty acidsaturated fats
Saturated fats have hydrocarbon chains which can be most readily aligned.
While many studies have found that including polyunsaturated fats in the diet in place of saturated fats produces more beneficial CVD outcomes, the effects of substituting monounsaturated fats or carbohydrates are unclear.

Safflower

safflower oilCarthami FlosCarthamus tinctorius
Other preliminary research indicates that omega-6 fatty acids in sunflower oil and safflower oil may also reduce the risk of cardiovascular disease.
There are two types of safflower that produce different kinds of oil: one high in monounsaturated fatty acid (oleic acid) and the other high in polyunsaturated fatty acid (linoleic acid).

Polyunsaturated fatty acid

polyunsaturated fatty acidspolyunsaturatedconjugated linolenic acid
High levels of docosahexaenoic acid (DHA), however, the most abundant omega-3 polyunsaturated fatty acid in erythrocyte (red blood cell) membranes, were associated with a reduced risk of breast cancer.
Polyunsaturated fat

Sunflower seed

sunflower seedssunflowerLargest sunflower seed producer
Half of a 100-gram serving is fat, mainly monounsaturated and polyunsaturated fats, principally linoleic acid.

Canola oil

canolacanola (rapeseed)canola (rapeseed) oil
It is considered safe for people to eat, and has a relatively low amount of saturated fat, a substantial amount of monounsaturated fat, with roughly a 2:1 mono- to poly-unsaturated fats ratio.

Peanut butter

Creme de peanutcrunchy peanut butterpeanut spread
Both crunchy/chunky and smooth peanut butter are sources of saturated (primarily palmitic acid, 21% of total fat) and monounsaturated fats, mainly oleic acid as 47% of total fat, and polyunsaturated fat (28% of total fat), primarily as linoleic acid).

Peanut

groundnutgroundnutspeanuts
Peanuts contain polyphenols, polyunsaturated and monounsaturated fats, phytosterols and dietary fiber in amounts similar to several tree nuts.

Hydrocarbon

hydrocarbonsliquid hydrocarbonHC
Polyunsaturated fats are fats in which the constituent hydrocarbon chain possesses two or more carbon–carbon double bonds.

Double bond

double bondsdoubledouble-bond
Polyunsaturated fats are fats in which the constituent hydrocarbon chain possesses two or more carbon–carbon double bonds.

Oyster

oystersoyster bedoyster beds
Polyunsaturated fat can be found mostly in nuts, seeds, fish, seed oils, and oysters.

Cis–trans isomerism

cistranscis-trans
These materials exist as cis or trans isomers depending on the geometry of the double bond.

Conformational isomerism

conformationrotamerconformations
These materials exist as cis or trans isomers depending on the geometry of the double bond.

Greek alphabet

GreekGreek lettersGreek letter
The position of the carbon-carbon double bonds in carboxylic acid chains in fats is designated by Greek letters.

Carboxylic acid

carboxylcarboxyl groupcarboxylic acids
The position of the carbon-carbon double bonds in carboxylic acid chains in fats is designated by Greek letters. The carbon atom closest to the carboxyl group is the alpha carbon, the next carbon is the beta carbon and so on. In fatty acids the carbon atom of the methyl group at the end of the hydrocarbon chain is called the omega carbon because omega is the last letter of the Greek alphabet.

Methyl group

methylCH 3 Me
The carbon atom closest to the carboxyl group is the alpha carbon, the next carbon is the beta carbon and so on. In fatty acids the carbon atom of the methyl group at the end of the hydrocarbon chain is called the omega carbon because omega is the last letter of the Greek alphabet.

Polymerization

polymerizepolymerisationpolymerized
Drying oils, which polymerize on exposure to oxygen to form solid films, are polyunsaturated fats.

Oxygen

OO 2 molecular oxygen
Drying oils, which polymerize on exposure to oxygen to form solid films, are polyunsaturated fats.