Hot pot lovers and home cooks across Hong Kong can breathe a sigh of relief. A recent investigation by the Macau Consumer Council has confirmed that all 15 samples of tofu, bean curd sheets, and crispy beancurd rolls tested were completely free from banned industrial dyes and dangerous levels of lead, putting to rest long-standing fears over contaminated soy products.
The watchdog conducted the random tests following previous reports of unscrupulous manufacturers illegally adding toxic industrial colourants to bean curd sheets to enhance their appearance. Officials purchased the samples—ranging from fresh bean curd sheets and hot pot crispy rolls to dried tofu and silken tofu—from supermarkets across Macau. Prices spanned from MOP$6.00 to MOP$27.50, with product origins including mainland China, Malaysia, South Korea, Taiwan, and Hong Kong.
Banned Substances Under Scrutiny
The investigation focused on two categories of hazardous materials. The first was industrial dyes—specifically Basic Yellow and Dimethyl Yellow—which are not food-grade colourants. These substances are classified as highly toxic and potentially carcinogenic, with risks including genetic mutations and severe long-term health damage when consumed over time.
The second concern was heavy metal contamination, particularly lead. Even low-level, prolonged exposure to lead can accumulate in the body, gradually impairing liver and kidney function, as well as damaging the nervous system.
All Products Passed with Flying Colours
In a reassuring outcome for consumers, every single sample returned negative results for both categories of contaminants. None of the 15 products showed detectable levels of banned dyes or excessive lead, meeting all relevant food safety standards.
The complete list of tested products includes household names such as PAK FOOK steamed silken tofu, Vitasoy SAN SUI organic silken tofu, Magic Cook Haidilao hot pot crispy rolls, and TOPSOYA organic soybean tofu, alongside other popular brands like EB Croissant Shaped Ring Roll, LCH Lau Chung Hing fresh bean curd sheets, and ZHOU HEI YA braised tofu.
Who Should Exercise Caution?
Despite the clean bill of health, registered dietitians consulted by the Macau Consumer Council highlighted that soy products are not suitable for everyone. Three groups of people should carefully monitor their intake or avoid these foods altogether:
- Gout sufferers: Soy products contain purines, which can trigger painful flare-ups.
- Individuals with high uric acid: Excess purine consumption raises uric acid levels, placing additional strain on the kidneys.
- People with sensitive digestive systems or bloating: Beans contain oligosaccharides that are difficult to digest, often leading to gas and abdominal discomfort.
Expert Tips for Safe Selection and Consumption
Even though the tested products were all safe, the council offered practical advice to help consumers make informed choices at the market:
- Buy from reputable retailers and always check packaging for damage or compromised seals.
- Read labels carefully—look for production dates, expiry dates, and proper storage instructions. Avoid any packaging that appears swollen or puffed.
- Inspect appearance and smell—quality bean curd sheets should be dry, firm, and free from mould or rancid odours. Any sour, chemical, or musty smells upon opening signal spoilage.
- Store and cook properly—once opened, soy products spoil quickly due to their high moisture and protein content. Always seal leftovers and refrigerate promptly. Soak thoroughly and cook completely before eating.
Broader Implications for Food Safety
This investigation serves as a timely reminder for Hong Kong consumers who frequently rely on soy products for daily cooking and hot pot gatherings. The all-clear results are encouraging, but the vigilance shown by regulatory bodies highlights the importance of continued monitoring. With past cases of illegal dye use in the industry, consumers are urged to remain cautious, support transparent labelling, and prioritise products from trusted sources.
For those looking to stay informed, the Macau Consumer Council’s full report is available in Issue No. 393 of Macau Consumer, while further reading on food safety issues—including instant noodle sodium levels and hidden contaminants in other pantry staples—can be found through the Hong Kong Consumer Council’s ongoing investigations.