Many consumers buying over-the-counter omega-3 fatty acid supplements may be getting rancid pills, according to a new study published Sept. 7 by researchers at the George Washington University. Derived from plants (algae) as well as seafood (fish, krill, etc.) , omega-3 supplements—sometimes labeled as fish oil—are often taken because of research that suggests they may provide health benefits.
Many consumers buying over-the-counter omega-3 fatty acid supplements may be getting rancid pills, according to a new study published Sept. 7 by researchers at the George Washington University. Derived from plants as well as seafood , omega-3 supplements—sometimes labeled as fish oil—are often taken because ofRancidity is measured by the amount of oxidation of the oil in the supplement. As supplements become more oxidized, the nutritional benefits delivered to the consumer are reduced.
The article,"A Multi-Year Rancidity Analysis of 72 Marine and Microalgal Oil Omega-3 Supplements," was published in theHigher levels of omega-3 have been associated with a wide range of benefits to multiple organs, including the brain and eyes, but the most common reason for its popularity with consumers is to help the cardiovascular system.omega-3 supplements
The researchers found a total of 45% of flavored and unflavored supplements tested positive for rancidity, with 32% of flavored supplements testing positive and 13% of unflavored pills. However, added flavoring can mask the rancidity of supplements. While the oxidation is present in the flavored supplements, indicating there is a positive level of rancidity, Frame says the amount of oxidation isn't known because of the flavoring compounds themselves.
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