Seafood is a great source of nutrients for pregnant and nursing women, but it is not without its downsides for both mother and baby. Fish can contain high levels of mercury and other contaminants, and it is often difficult to balance the benefits and risks. Thankfully, information on how much and how often fish can be safely consumed is available in the palm of our hands.

The updated, free app – Fish4Health –helps women track their intake of seafood, fish oil supplements, healthy fats and mercury. Based on the latest research, the app also contains information on fish species from across the country. The app is available in English, Spanish and traditional or simplified Chinese. 

“Pregnant or nursing women should consume eight to 12 ounces of fish per week,” said Charles Santerre, professor of food toxicology and Purdue Extension specialist in the Department of Nutrition Science.

Also available online is an updated wallet card, with information about which commercial fish species are best to eat when women are expecting or nursing a baby. Recommendations on how much to eat are based on tests in Santerre’s lab for amounts of healthy fats, trace elements and heavy metals such as mercury.  

The app and wallet card  are part of a larger effort by Santerre and Purdue Extension to make it easier for consumers to know when it is safe to eat recreationally-caught and store-bought fish.

Visit to download the app and for more information on the risks of contaminants in fish, consumption guides, and cooking tips.  

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