A recent study by the City University of Hong Kong ( CityUHK), which was recently published in Science, found that widely consumed fish, such as salmon, swordfish, tuna, and cod, are contaminated with PFAS ( perfluoroalkyl and polyfluoroalkyl substances ).

These substances, which are frequently referred to as" chemicals for life," pose serious health risks. Over the course of two years, researchers have looked at PFAS concentrations in 212 coastal fish species and collected information from 3, 000 locations around the world. The results revealed that even in areas with little climate pollutants, bass contain PFAS concentrations. Between 2010 and 2021, the global average levels of PFAS in fish were 0. 34 ng/g, with significantly higher rates in Asia.

Health Effects

Author of the study Kenneth Mei Yee Leung warned of certain risks for some groups, including the elderly, pregnant women, and young toddlers, who are more susceptible to the PFAS's negative effects.

The public was advised to choose seafood with higher rates of these substances and opt for a healthy diet.

Numerous health issues are linked to prolonged exposure to PFAS. These frequent chemicals can be accumulated throughout the body and have an impact on a variety of organ systems.

Cancer Risks. With severe coverage, PFAS, like as PFOA, increases the risk of kidney and penile cancer. In clinical research, they are also linked to various different cancer types.

Immunological consequences Substances weaken the immune system, lowering the ability to respond to vaccinations and combat infections. Particularly in babies, this is obvious.

kidney and liver deterioration. They lead to increased cholesterol, liver damage, and altered liver enzymes. After a long period of concentration, experiments reveal effects on liver and kidney function.

sexual and hormonal issues. Low birth weight, premature delivery, and development impairment in children are caused by them interfering with thyroid hormones, reproduction, and fetal development. Additionally, they raise the risk of hypertension in pregnant women.

Food safety and rules

In light of the rise in PFAS contamination, this investigation emphasizes the need to examine the laws governing fish imports and food security.

The information presented is intended to inform users and government bodies about the immediate need to address the issue of tainted fish consumption.

PFAS concentrations

Clear differences in PFAS concentrations have been found between different types of fish and also between parts of the same fish. These differences depend on the species, habitat, and the tissue analyzed (muscle vs. viscera).

Components that explain the differences:

Steaks versus full fish levels:

distinctions between species that are consumed frequently:

Consumption repercussions:

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