The Hong Kong Consumer Council (HCC) has alerted the public to concerning hygiene standards in packaged preserved vegetables sold across the city, revealing that nearly all samples tested contained trace amounts of foreign matter, including insect fragments, dust mites, and metallic shards. Published in the latest issue of their Choice magazine (Issue 561), the comprehensive investigation assessed 30 prepackaged pickle products—sourced from major supermarkets and department stores—discovering minor light foreign matter contamination in 97% of the samples, though officials note regulatory guidelines for such contaminants are currently absent.
Widespread Contamination Found in Assortment of Pickles
The HCC examined a range of popular preserved vegetables, specifically targeting eight types of kimchi, four types of sauerkraut, five types of pickles (cucumber), five types of preserved mustard tuber (榨菜), four types of radish, and four types of preserved olive vegetables (橄欖菜). The methodology focused on testing for “light foreign matter”—microscopic contaminants often invisible to the naked eye. While the majority of samples contained small quantities of these fragments, the total contaminant counts ranged significantly, from a minimum of one fragment to a maximum of 314 fragments per sample.
The tests identified various undesirable materials, including natural and synthetic fibers, plastic shards, sand particles, hair, and even insect parts such as heads and attached segments, along with dust mites and metal fragments. Only one product, Foodcraft’s “Unpasteurized Living Original Sauerkraut,” a German sauerkraut variety, was found to be completely free of light foreign matter.
Olive Vegetable Brands Show Highest Contaminant Levels
A significant concentration of foreign matter was identified specifically within the preserved olive vegetable category. Three olive vegetable brands exhibited markedly higher counts of insect fragments.
The samples with the highest contamination levels per 100 grams were:
- Kwan Hing Kee Preserved Olive Vegetable: Containing 310 insect fragments.
- Min Heung Preserved Olive Vegetable: Containing 129 insect fragments.
- Mei Wei Zan Preserved Olive Vegetable: Containing 91 insect fragments.
The HCC suggested that the preparation of olive vegetables, which relies heavily on mustard leaves, may present inherent hygiene challenges. The complex structure of the leaves can easily trap dirt, making thorough cleaning difficult. Combined with potential sanitation gaps during storage or processing, this environment increases the risk of contamination by insects like flies.
All findings and details regarding the affected products have been forwarded to the Centre for Food Safety for immediate review and further action.
Quality Not Correlated with Price
The test also highlighted that pricing was not an indicator of product quality or hygiene. The samples varied widely in cost, ranging from $4.3 to $82 per package. After adjusting for volume, the cost per 100g or 100ml ranged from $4.3 to $26.5. This data confirmed that there was no necessary correlation between a product’s retail price and its purity or quality standards.
The Council also advised consumers to exercise caution when comparing prices, noting that some labels only display the net weight including liquid, while others specify the net weight of the solids (the “drained weight”). Comparing prices based on the wet weight could misleadingly lower the apparent cost per 100g.
Industry Standards and Consumer Reassurance
The HCC acknowledged that minuscule insect fragments in food products are often unavoidable factors in large-scale food production. Crucially, the Council noted that neither Hong Kong nor the European Union currently imposes regulatory limits or action levels for light foreign object contamination. Furthermore, there is presently no scientific evidence suggesting that low levels of these non-hazardous light foreign materials pose a direct health risk to consumers.
However, the presence of elevated levels of light foreign matter does serve as an important indicator that the manufacturing premises or processing procedures require significant improvement in hygiene management.
For consumers seeking high-quality options, the HCC recognized several products across various categories that achieved a high overall rating of 4.5 stars:
- Kimchi: 759 Store, Cut Cabbage Kimchi
- Sauerkraut: Clearspring, Demeter Organic Sauerkraut; Chee Ma Shan, Mildessa Mild Wine Sauerkraut; Develey, Bavarian Sauerkraut
- Pickles (Cucumber): Marks & Spencer, Pickled Sliced Gherkins In Vinegar With Mustard Seeds; Coles, Special Burger Pickles
- Preserved Mustard Tuber (榨菜): Pearl River Bridge, Sliced Mustard Tuber; Tin Lung, Original Sliced Mustard Tuber; Wu Jiang Fuling, Preserved Mustard Tuber in Chilli Oil (Glass Jar)
- Preserved Radish: Chung Jung One, Cut Seasoned Radish