Canned dace with black bean sauce, a beloved Hong Kong pantry staple, shows sodium levels varying by nearly double across seven brands tested, with one HK$23.9 product earning top marks for safety and quality.
The Consumer Council of Hong Kong has issued a critical health warning for fans of canned dace, a quick and convenient meal companion. In its latest Choice magazine issue (No. 525), the watchdog tested 46 common canned fish products, including seven varieties of dace. The results revealed stark differences in nutritional content, particularly sodium. One sample, priced at HK$23.9, stood out not only for its low contamination risk but also for achieving a perfect five-star overall rating, making it the only product to receive the highest distinction in the assessment.
Testing Methodology: From Supermarket Shelf to Laboratory
The Council sourced the products from local supermarkets and department stores, with prices ranging from HK$15.9 to HK$23.9 per can. In a rigorous process, laboratory technicians separated the fish from sauces and seasonings before testing. The analysis covered metal pollutants such as antimony, arsenic, cadmium, lead, mercury, and tin, alongside banned colouring agents and polychlorinated biphenyls (PCBs). Nutritional evaluations measured energy, protein, fat, carbohydrates, sugar, sodium, calcium, and essential fatty acids like DHA and EPA.
Sodium Levels: A Stark Divide
The tests exposed a significant disparity in sodium content. While all dace samples were classified as “high sodium” according to local food regulations, the variation between brands was startling. Four products—Tianlong, Eagle Coin, Pearl River Bridge, and Great Wall—contained over 1,000 mg of sodium per 100 grams of fish. In contrast, the top-rated brand demonstrated markedly lower levels.
This is particularly concerning given that dace is often consumed in generous portions. For instance, Eagle Coin’s product, with the highest labelled sodium, offers 283 mg of sodium in a quarter-can serving of fish alone. However, consuming the entire can—including the sauce—yields over 880 mg, exceeding 40% of the World Health Organization’s recommended daily sodium limit for adults.
Calcium Content: A Surprising Benefit
Despite the sodium concerns, canned dace offers a nutritional silver lining. The high-pressure canning process softens the fish bones, making them edible. The tests showed that dace contains the highest average calcium content among all canned fish varieties tested. The Ganzhu brand led with an impressive 910 mg of calcium per 100 grams of fish. Remarkably, a seven-year-old child would need only about 109 grams—roughly 0.6 cans—to approach their entire daily recommended calcium intake.
Contaminant Levels: Reassuring Results
All dace samples tested positive for trace metal contaminants, but at levels below regulatory limits. The products earned overall safety scores of four to five stars. However, the Pearl River Bridge brand contained small amounts of dioxin-like PCBs, which could pose a risk only with excessive, long-term consumption.
Broader Implications for Hong Kong Consumers
The findings underscore a critical balancing act for local households. Canned dace offers convenience and bone-strengthening calcium, but its high sodium content—especially from the accompanying sauce—poses risks for hypertension and cardiovascular health. Dietitians recommend moderation: limiting portion sizes to one-quarter to one-half of a can per meal, rinsing the fish, and pairing it with low-sodium vegetables.
For families with children, the calcium benefit is notable, but parents should monitor total daily sodium intake. The top-rated HK$23.9 product demonstrates that affordable, safer options exist.
Next Steps for Shoppers
Hong Kong consumers are advised to check nutrition labels carefully, focusing on sodium per 100 grams rather than per serving. The Consumer Council suggests pairing canned fish with steamed rice and fresh greens to dilute sodium impact. Future editions of Choice are expected to expand testing to additional canned fish varieties, offering even more detailed guidance for health-conscious buyers.