OmegaCheck

DHA

Optimal Result: 1.4 - 5.1 % by wt.

Docosahexaenoic acid (DHA) is one of the omega-3 fatty acids.

The growth and development of the central nervous system is particularly dependent upon the presence of an adequate amount of the very long chain, highly unsaturated fatty acids, docosapentaenoic and docosahexaenoic acids. Docosahexaenoic acid (DHA) is an important member of the very long chain fatty acids that characteristically occur in glycosphingolipids, particularly in the brain. Docosahexaenoic Acid (DHA), is integral to the growth and development of the central nervous system in fetuses and infants. Deficiencies in DHA can also lead to ADD/ADHD, mental retardation, and failures in visual development and function, including blindness from retinitis pigmentosa.

DHA plays major roles in:

– brain development [1234567]
– benefitting the aging brain [8910111213141516171819202122]
– eye and vision health [2324]
– reducing inflammation in the body [2526]
– reducing asthma symptoms (272829)
– pregnancy, lactation and childhood [1303132]

Sources of DHA:

The best-known sources of omega-3 fatty acids are algae, cold-water fish, flaxseed, soybean, walnuts and their oils.

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Omega-3 fatty acids (omega-3s) have a carbon–carbon double bond located three carbons from the methyl end of the chain. Omega-3s, sometimes referred to as “n-3s,” are present in certain foods such as flaxseed and fish, as well as dietary supplements such as fish oil. Several different omega-3s exist, but the majority of scientific research focuses on three: alpha-linolenic acid (ALA), eicosapentaenoic acid (EPA), and docosahexaenoic acid (DHA). ALA contains 18 carbon atoms, whereas EPA and DHA are considered “long-chain” (LC) omega-3s because EPA contains 20 carbons and DHA contains 22.

PUFAs are frequently designated by their number of carbon atoms and double bonds. ALA, for example, is known as C18:3n-3 because it has 18 carbons and 3 double bonds and is an n-3, or omega-3, fatty acid. Similarly, EPA is known as C20:5n-3 and DHA as C22:6n-3. Omega-6 fatty acids (omega-6s) have a carbon–carbon double bond that is six carbons away from the methyl end of the fatty acid chain. Linoleic acid (C18:2n-6) and arachidonic acid (C20:4n-6) are two of the major omega-6s.

The human body can only form carbon–carbon double bonds after the 9th carbon from the methyl end of a fatty acid. Therefore, ALA and linoleic acid are considered essential fatty acids, meaning that they must be obtained from the diet. ALA can be converted into EPA and then to DHA, but the conversion (which occurs primarily in the liver) is very limited, with reported rates of less than 15%. Therefore, consuming EPA and DHA directly from foods and/or dietary supplements is the only practical way to increase levels of these fatty acids in the body.

ALA is present in plant oils, such as flaxseed, soybean, and canola oils. DHA and EPA are present in fish, fish oils, and krill oils, but they are originally synthesized by microalgae, not by the fish. When fish consume phytoplankton that consumed microalgae, they accumulate the omega-3s in their tissues.

What does it mean if your DHA result is too low?

- Low DHA levels are linked among other things to an increased risk of developing memory complaints, dementia and Alzheimer’s disease. [18353637].

- Low levels are linked to brain diseases [3839].

- Low levels can cause vision problems, especially in children [14041].

- Low levels are associated with a higher risk of cardiovascular disease and death [42434445].

- DHA deficiency in early life has been associated with learning disabilities, ADHD, aggressive hostility and several other disorders [464740].

- Furthermore, studies have linked low levels in the mother to an increased risk of poor visual and neural development in the child [14041].

If you find that your omega-3 levels are low, consult your health care practitioner to discuss changing your diet or adding EPA and DHA dietary supplements.

What does it mean if your DHA result is too high?

- High levels suggest you are consuming a lot of fish or fish oils or supplements.

- High levels in males have been linked to a higher prostate cancer risk [33].

- DHA may thin your blood and may cause excessive bleeding [34].

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