International Laverbread Day

Laverbread is made from an edible red seaweed in the Porphyra genus, often called laver.

In Wales and parts of the British Isles, this seaweed is gathered from rocky shores, thoroughly washed, and then boiled or steamed for several hours until it becomes a dark, soft purée.

It is usually sold as this paste, sometimes seasoned or rolled in oats before frying. Similar Porphyra species are also used to make nori in Japan.  

In traditional Welsh cooking, fresh laver is repeatedly rinsed to remove sand and shells, then simmered for several hours until it develops a thick, smooth texture.

The resulting laverbread is often mixed with oatmeal, formed into small cakes, and fried in fat until crisp on the outside.

It is commonly served at breakfast with bacon, eggs, and sometimes cockles, but can also be stirred into soups, stews, or sauces to add a strong savory, sea-like flavor.  

Laverbread and related edible seaweeds are typically rich in iodine, vitamin B12, and soluble fiber, as well as minerals such as iron, magnesium, and calcium.

They are low in calories and contain small amounts of protein and beneficial polysaccharides that may support gut health.

Because of the high iodine content, seaweed can play a role in supporting normal thyroid function, especially in regions where iodine intake from other foods is low.  

Most healthy adults can safely include moderate amounts of seaweed, including laverbread, as part of a varied diet.

However, some seaweeds contain very high levels of iodine, and regularly eating large quantities can exceed recommended limits and affect thyroid function.

Health authorities in several countries advise that people with thyroid disorders, pregnant individuals, and those taking thyroid medication should be cautious with frequent seaweed intake and check labels or guidance on iodine content.  

When managed carefully, seaweed harvesting can be relatively low impact because seaweeds grow quickly and do not require freshwater, fertilizers, or farmland.

Responsible harvesting avoids pulling up the holdfast or damaging the underlying ecosystem, and leaves enough plant material to regrow.

Poorly regulated or intensive collection in sensitive areas, however, can reduce habitat for marine life and alter coastal ecosystems, so many regions use licensing, seasonal limits, and site-specific rules to keep seaweed use sustainable.  

People can forage seaweed on some coasts, but they should first check local laws and access rights, as some shorelines or species are protected.

Safety guidance typically includes collecting only from clean waters away from sewage outlets, harbors, or industrial discharges, taking just the upper parts of the plant so it can regrow, and avoiding species they cannot clearly identify.

Because seaweeds can accumulate contaminants such as heavy metals, it is generally advised to forage in unpolluted areas and to follow any public health advisories for local shores.  

Laverbread and Japanese nori both come from Porphyra species, so they share a similar base ingredient, but they differ in processing and texture.

Nori is pressed and dried into thin sheets used for sushi and snacks, while laverbread is boiled into a soft paste and eaten cooked or fried. In other regions, such as Korea and Ireland, related seaweeds are roasted, toasted, or added to breads, soups, and stews.

Despite regional variations, these foods often play similar roles as concentrated sources of marine flavor, minerals, and iodine in traditional diets.