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Most fatty acids can be naturally produced [link widoczny dla zalogowanych] in the normal mechanism of human body; the body is capable of producing monounsaturated fatty acids (using a double bond at the [link widoczny dla zalogowanych] point of omega-9) and saturated fatty acids.
However there is no synthetic system for making two essential fatty acids including linoleic acids (18 carbon atoms and [link widoczny dla zalogowanych] two double bonds) and alpha-linolenic acid (18 carbons with 3 double bonds), thus the necessity of incorporating these compounds to diet on [link widoczny dla zalogowanych] a daily basis.
Essential fatty acids or "EFAs" are polyunsaturated fatty acids categorized in omega-6 (n-6) [link widoczny dla zalogowanych] and omega-3 (n-3)fatty acids; depending on the type of oils containing various classification of polyunsaturated fatty acids with different percentage.
The body is unable to provide the required enzyme to introduce a double bond at the omega-6 [link widoczny dla zalogowanych] and omega-3 places; although the body may enable conditions for conversion of e.g. one omega-3 to some other omega-3, but unable to construct one n-3 from n-6 or from saturated fatty [link widoczny dla zalogowanych] acids.
Basically essential fatty acids are necessary for mammals in order to supplying compounds responsible for maintaining regular mechanism of the body for instance: balancing the blood pressure, blood lipid proportion, immune system, blood clot, etc.
Insufficient / imbalanced intake of omega-3 in diet has been suggested to induce adverse effects on moods and behaviour including developing aggressive behavior and depression. The main contributory factors to these symptoms are [link widoczny dla zalogowanych] still unclear.
Essential fatty acids are available from oils of certain plants or fish which can be used [link widoczny dla zalogowanych] to satisfy a healthy human diet. Generally, food sources rich in EFAs comprise flax seeds, chia seeds, pumpkin seeds, grape seeds, canola, walnut, fish oil, etc.
Linoleic acid
According to the recent research conducted on rodents, linoleic acids have some beneficial properties which can suppress/reduce the risk of cancer-related diseases. Results have also confirmed that linoleic acids are able to reduce body fat in addition to improving muscle tissue and bone density. Further studies are being carried out to ascertain the ability of these functions in human body.
Linoleic acid (LA) is mainly obtainable from certain vegetable oils especially grape seed oils which are extracted from [link widoczny dla zalogowanych] the seeds of "vitis vinifera grapes" ranges. Oils from these plants contain considerable quantities of fatty acids; polyunsaturated (69%), monounsaturated (16%) and saturated (9%) fatty acids. Grape seed oils are nutritionally valuable in terms of high contents of linoleic acids which can supply omega-6 essential fatty acids in the human diet. Moreover, [link widoczny dla zalogowanych] oleic acids also account for a relatively noticeable amount in grape seed oils providing omega-9 monounsaturated fatty acids.
Alpha-linolenic acid
This is classified as polyunsaturated omega-3 fatty acid which is commonly originated from vegetable oils (including flax seed with 18 % omega-3), butter nuts, walnuts, pecan nuts)and seafood specially oily fish such as herring, sardines, mackerel, anchovies and trout. The body has the ability [link widoczny dla zalogowanych] to convert alpha-linolenic acid into the "longer chain fatty acids" including eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) respectively.
It has been reported that alpha-linolenic acids have some protective characteristics against cardiovascular disease particularly arrhythmia (irregular heart beat). However it is yet to be analyzed if this beneficial factor is purely due to the presence of ALA or is it is in association with those metabolic compounds (EPA and DHA).
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