Canned sardines present levels of cadmium and inorganic arsenic that deserve special attention. Understanding what happens inside the can, from the metal lining to the fish itself, allows for more informed choices in the canned goods aisle.
Cadmium and Inorganic Arsenic in Canned Sardines
The sardine, a small pelagic fish positioned low in the food chain, accumulates significantly less mercury than tuna. This observation is well documented. Cadmium and inorganic arsenic, on the other hand, remain largely underestimated in current discussions about canned fish.
Inorganic arsenic, the most toxic form, comes from both the marine environment and chemical interactions with the metal container. Cadmium follows a similar logic: concentrations vary depending on the fishing coastal area and the season of capture.
Sterilization temperature and duration of thermal treatment also play a role in the formation of undesirable compounds. These are two parameters over which the consumer has no control. To cross-reference this toxicological data with the practices of each manufacturer, the question of canned sardines dangers and best brands deserves thorough examination.
Bisphenol A in Canned Sardines: What’s the Status of European Regulation
New restrictions on BPA in food contact materials have been adopted at the European level, accompanied by an eighteen-month transition period before they take effect.
However, canned fish are treated differently. The ban on introducing new cans containing BPA will only apply in 2028 for canned fruits, vegetables, and fish. The sardines available today on the shelves may still be packaged in BPA-lined containers.
Some brands already display the label “BPA-free.” But the absence of BPA does not mean the absence of any endocrine disruptor. Commonly used substitutes (BPS, BPF) have much less toxicological data. We recommend prioritizing manufacturers that specify the exact nature of the alternative lining, rather than those that limit themselves to a pictogram without further detail.
Product Recalls and Undeclared Allergens: A Risk to Watch
Beyond chemical contaminants, canned sardines are regularly subject to health recalls for more immediate reasons. These incidents affect both store brands and specialized manufacturers.
The government website RappelConso references these alerts in real-time. Consulting this database before purchasing a promotional lot is the most reliable reflex, much more so than a brand’s reputation or a label on the can.
Label Reading: Criteria to Check
- FAO fishing area: it provides information on the geographical origin of the sardines and the environmental conditions of the capture area
- Short ingredient list (sardines, olive oil, salt), without flavors, flavor enhancers, or thickeners
- Packager code and country of processing, which does not necessarily correspond to the fishing area
- Indication of the type of interior lining of the can, especially in the absence of a “BPA-free” logo
Sardines in Olive Oil: Insights from Organoleptic Tests
A jury of experts gathered by ELLE à table evaluated several sardines in olive oil sold in supermarkets. The quality gaps between brands were found to be very pronounced, even at comparable price levels.
Three discriminating criteria emerged. The firmness of the flesh: a sardine that crumbles upon removal has undergone excessive thermal treatment. The fish/oil ratio: some cans contain more filling oil than fish. And the quality of the oil used. Extra virgin olive oil provides polyphenols absent from refined oil, without the manufacturer being required to specify this distinction on the label.
Nutritionally, canned sardines remain one of the most interesting fish due to their richness in omega-3 and their low accumulation of mercury compared to tuna.
Brands Distinguished by Tasting Panels
La Grande Épicerie de Paris, Connétable, and Monoprix Gourmet are among the highest-rated canned goods in these comparative tests. Price does not predict taste quality: well-sourced store brand sardines compete with canned goods sold at twice the price.
The most reliable criterion remains the manufacturer’s transparency regarding the fishing area, cooking method, and type of oil. The new European regulation on packaging (PPWR), currently being progressively implemented, will change the formats of available cans. Brands will need to adapt their containers to the new recyclability requirements, which could lead to changes in ranges and prices in the coming months.