Cod liver oil is a dietary supplement derived from cod liver (Gadidae). Like most fish oils, they contain omega-3 fatty acids, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA). The cod liver oil also contains vitamin A and vitamin D. Historically, it was given to children because vitamin D has been shown to prevent rickets, a consequence of vitamin D deficiency.
Video Cod liver oil
Producing
The cod liver oil has traditionally come in many levels. Cod liver oil for pale human consumption and straw, with mild flavor. Ancient Scandinavian Viking produces cod liver oil by putting birch branches over the water kettle, and fresh livers placed on the branch. The water is boiled and when the steam rises, the oil from the liver drips into the water and is released. There are also methods to produce fresh raw cod liver oil.
In the Industrial Revolution, cod liver oil became popular for industrial use. The liver placed in a rotting barrel, with oil skim off during the season, is the main method for producing this oil. The resulting oil is brown and foul smelling. In the 1800s cod liver oil became popular as a drug and pale and brown oil was used. Brown oil is common because it is less expensive to produce. Some doctors believe using only fresh pale oil, while others believe that chocolate oil is better. However, chocolate oil tends to cause intestinal disorders.
The MÃÆ'¶ller process was invented by Peter MÃÆ'¶ller in 1850. Carefully milled with water into a slurry, then it is boiled slowly until the oil rises to the top. The oil is purified and refined. Other methods used in modern times include the Cold Flotation Process, Pressure Extraction, and Cooking Pressure. This all requires further purification steps to obtain pure oil.
Maps Cod liver oil
Therapeutic use
Although similar in fatty acid composition to other fish oils, cod liver has higher vitamin A concentrations and D. According to the US Department of Agriculture, one tablespoon (13.6 grams or 14.8 mL) of cod liver contains 4.080 g retinol (vitamin A) and 34 Âμg (1,360 IU) of vitamin D. Referral intake The vitamin A diet is 900 ug per day for adult men and 700 ug per day for women, whereas for vitamin D is 15? g per day. The tolerable upper intake level (ULs) is 3000 g/day and 100 g/day, respectively. People who consume cod liver oil as a source of omega-3 fatty acids should pay attention to how much vitamin A and vitamin D are added to their diet.
The cod liver oil is about 20% omega-3 fatty acids. For this reason cod liver oil may be beneficial in secondary prophylaxis after a heart attack. Foods added with cod liver oil have also been shown to have beneficial effects on psoriasis.
Potential side effects
One tablespoon (13.6 g) cod liver contains 136% UL for preformed vitamin A (retinol). Vitamin A accumulates in the liver, and can reach dangerous levels sufficient to cause hypervitaminosis A. Pregnant women may want to consider consulting a doctor when eating cod liver oil due to the high amount of retinol.
The oxidation of fatty acids and environmental toxic compounds is reduced when the purification process is applied to produce refined fish oil products.
Other uses
In Newfoundland, cod fish oil is sometimes used as a liquid base for traditional ocher paint, a preferred layer for use on outdoor buildings and work-related cod fishing.
In TÃÆ'¼bingen, Germany, drinking a glass of cod liver oil is a punishment for the losers in the traditional Stocherkahnrennen, a punting boat race by the University of TÃÆ'¼bingen group.
See also
- Vitamin A overdose
- Shark liver oil
References
External links
Source of the article : Wikipedia
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