Algae in Everyday Life: What if We Reinvented Friday?

For decades, Friday in France has been synonymous with fish. But where does this habit actually come from? And more importantly, what does it still mean for us today, at a time when the oceans are fragile and there is increasing talk of food transition?

In a context of overfishing, marine pollution, and the search for more sustainable solutions, this tradition deserves to be revisited—not to eliminate it, but to enrich it.

This is precisely the ambition of the movement “Seaweed Daily: Let's Start with Friday”, launched by Éric Viard and Aurélie Mazerm Viard, authors of the book Seaweed Daily, awarded the Best Cookbook in the World – Seafoods Category at the Gourmand Awards 2025 and the Best Cooking and Well-being Book in France by the National Academy of Cuisine in 2025.

Add, Don't Replace

The idea is simple: not to oppose fish and seaweed, but to offer an additional choice. To provide a modern, safe, and ecological marine alternative that allows us to maintain the symbolism of the Friday meal while aligning it with current realities.

In practice, it involves introducing a seaweed dish on Fridays: at home, in restaurants, in collective catering. An accessible, gradual, non-guilt-inducing gesture.

Seaweed, a Complete Superfood

Rich in iodine, minerals, trace elements (zinc, copper, manganese, selenium, chromium), absorbable iron, marine polyphenols, soluble fibers, and vitamins, seaweed supports:

• immunity,
• vitality,
• intestinal health,
• thyroid function,
• metabolic balance.

An Exemplary Resource for the Planet

Ecologically, seaweed is hard to beat:

• no freshwater,
• no arable land,
• no fertilizers,
• no pesticides, fungicides, herbicides,
• they capture CO₂,
• they contribute to the regeneration of marine ecosystems.

Fish: A Worrying Observation

Conversely, fish accumulate pollutants throughout the food chain:

• heavy metals (mercury, lead, cadmium),
• liposoluble pollutants (PCBs, dioxins),
• microplastics.

The larger and more predatory a fish is, the more contaminated it is. Species like tuna or swordfish are regularly highlighted in official recommendations.

Seaweed, on the other hand, is not part of the animal trophic chain. They grow by osmosis, filter water, and expel what they do not assimilate. Therefore, they do not accumulate pollutants in the same way as marine animals, making them a much safer marine source for regular use.

A Simple Gesture to Reinvent Friday

Reinventing Friday doesn't require a revolution, but a concrete gesture:

• try a seaweed tartare instead of the usual starter,
• prepare a seaweed pesto to accompany pasta,
• add seaweed flakes to a salad or soup,
• offer a "sea and seaweed" menu in the canteen.

It's a way to maintain a connection to the sea while taking care of your health and the ocean.

Why Not Start This Friday?

Whether you are an individual, a restaurateur, a collective catering actor, or simply curious, you can take part in this movement: a seaweed dish on Friday, to enrich an ancient ritual with a modern alternative.

Seaweed Daily: Let's Start with Friday.
A gentle, non-guilt-inducing transition, deeply aligned with our times.