![]() However, other research has shown mercury levels in swai that are above the World Health Organization’s recommended limit in 50% of the samples tested ( 17). Some studies have found acceptable levels of mercury in swai from Vietnam and other southeastern and southern areas of Asia ( 14, 15, 16). Mercury contamination is another consideration. The improper disposal of wastewater is especially concerning because swai fish farms use a lot of chemical agents, including disinfectants, anti-parasitic drugs and antibiotics. ![]() The Monterey Bay Aquarium’s Seafood Watch program lists swai as a fish that should be avoided, as some swai fish farms generate waste products that are illegally dumped into rivers ( 3). The effect of swai fish farms on the ecosystem is a major concern ( 13). Use of an additive to keep swai moist increases its sodium content. Its main vitamin and mineral contributions are selenium, niacin and vitamin B12. Swai is moderate in nutritional value, offering a decent amount of protein but very little omega-3 fat. The soy and canola products are commonly genetically modified, which is a controversial practice ( 1, 3, 12). They’re typically fed rice bran, soy, canola and fish by-products. Swai don’t have particularly healthy diets. However, amounts can vary based on what the fish is fed ( 5, 8). Swai is an excellent source of selenium and a good source of niacin and vitamin B12. The sodium in swai may be higher or lower than shown above based on how much sodium tripolyphosphate, an additive to retain moisture, is used during processing ( 1).
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