"I'm wary of overly radical speeches": a pharmacologist puts into perspective calls to boycott tuna

In recent weeks, several NGOs, including Bloom, have warned of possible mercury contamination in canned tuna, highlighting health risks, particularly for pregnant women and young children.

The alert, widely reported in the media, is based on the idea that tuna, once dried and concentrated, could contain high levels of mercury exceeding authorized limits. But the methodology and independence of some sources are questionable.

Dr. Alexandre Gérard, a pharmacologist at the Nice-Alpes-Côte d'Azur Regional Pharmacovigilance Center at the Nice University Hospital, calls for caution... but also for nuance.

What do you think about the warnings about mercury-contaminated tuna?

I'm wary of overly radical rhetoric. In this case, the data remains unclear, and some NGOs may have conflicts of interest. You should always verify the source and motivations behind an alert.

Are the dangers of mercury real?

Yes, the neurological effects of high doses are known. But in the studies reported, the demonstration is not free from bias and does not achieve total consensus in the scientific community.

Should tuna be banned?

No. ANSES [French Agency for Food, Environmental, and Occupational Health Safety] recommends that pregnant women and children under three years of age do not exceed one serving per week. Poisoning is very rare and mainly occurs with daily consumption over long periods.

Is the precautionary principle excessive?

There's no need to demonize it. Tuna provides omega-3s and good protein. It's better to vary your fish intake rather than banning one without solid evidence.

And in the canteens?

A monthly portion is safe.

For adults?

Eat fish twice a week, varying the species and avoiding the exclusive consumption of a single type of fish.

A more general word on power and alerts?

Every food has risks and benefits. Mercury today, like cadmium in chocolate yesterday, is a passing fad. Authorities prefer to react quickly to avoid any health scandal, but it's important to maintain a critical eye.