Sashimi Risks: Nutritionist Warns Five Groups to Avoid Raw Fish

Sashimi, a popular Japanese dish, is lauded for its high protein content and beneficial Omega-3 fatty acids like EPA and DHA, which are linked to cardiovascular health and brain function. However, a nutritionist warns that its raw nature bypasses the crucial step of high-temperature sterilization, exposing consumers to potential risks from parasites, bacteria, and heavy metals.

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Eating fish and eating sashimi are still two different things, the biggest difference being that sashimi lacks the 'high-temperature sterilization' safety net.

Nutritionist Lao Gu, writing on his Facebook page "Lao Gu Nutrition and Science," highlighted that while fish consumption is generally recommended for heart health, eating it raw presents distinct dangers. Unlike cooked fish, sashimi lacks the safety net of heat treatment, which significantly reduces the risk of foodborne illnesses. The primary concerns include parasites like Anisakis, which can cause severe gastrointestinal distress, and bacterial contamination, which can occur even with seemingly fresh fish if handling, cold chain management, or hygiene practices are compromised.

Lao Gu also pointed out the risk of heavy metal accumulation, particularly methylmercury, in larger, longer-lived predatory fish such as bigeye tuna, swordfish, and shark. Pregnant women and young children are especially vulnerable to mercury's neurotoxic effects and should be mindful of their fish choices.

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Currently, the risks of sashimi mainly come from 3 directions: parasite risk, bacterial contamination risk, and heavy metal risk.

Given these risks, Lao Gu strongly advises specific groups to avoid raw fish entirely. This includes pregnant women, young children, the elderly, individuals with weakened immune systems, and those undergoing chemotherapy or immunosuppressive therapy. For the general population, he recommends a cautious approach: prioritize sourcing from reliable suppliers who maintain cold chain integrity and practice good hygiene, diversify fish consumption to spread nutritional benefits and mitigate risks like mercury exposure, and ensure sashimi is not the sole source of protein in the diet. He stressed that understanding both the benefits and limitations of sashimi is key to enjoying it safely.

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Pregnant women, young children, the elderly, and those with weakened immune systems or undergoing immunosuppressive therapy or cancer treatment are groups that need to be more careful.