Is seaweed good to eat?

Seaweed is great to eat and can be used directly – either raw, dried or cooked - dependant on species. While low in fat, seaweed contains a vast abundance of important minerals, trace element, proteins and vitamins, as well as dietary fibre and vital oils. Seaweed like fish, is great brain food.

The mineral content of seaweeds, in the main, are greater than those found in plants grown in soil.

There are a few species of seaweed that are toxic and need to be avoided, but you won't find them in Seaspoon.

Is seaweed sustainable?

Seaweed can be harvested in the wild in a sustainable manner and cultivated in the ocean.

Seaweed is growing in popularity and as this continues so cultivation becomes more viable. The joy of cultivating this valuable nutrient resource is that it takes up virtually no land space to produce and once in the ocean there's no need for fresh water. It's our belief these two benefits alongside its nutrient content means Seaweed will play an important part in how we are able to sustainably feed our increasingly hungry planet. 

Where does your seaweed come from? 

We are licenced to harvest seaweed from a beautiful part of the South Coast of Devon. The Water - quality tests going back 5 years have been rated, in our designated areas, as excellent by the environmental agency. Despite this consistency, we carry out our own tests for pollutants and contaminants throughout the season.

We follow the strict Code of Conduct for seaweed harvesting, gathering by hand in order to minimise the impact on marine life and the local habitat, allowing the environment to thrive.

In addition, when needed, we purchase from an organic certified European partner who are also cultivators.

When is best to harvest seaweed?

Spring to Autumn. Seaweed is never gathered from the foreshore, only cut from healthy plants.

Can I eat too much Iodine rich seaweed?

Iodine is a prerequisite for the production of two important hormones, Thyroxin and Triiodothyronine, which regulate metabolism and control growth rate.

Although Iodine is essential for proper thyroid function, too much or too little can be equally harmful to health. 

The nutritional data of seaweeds vary throughout the year dependant on the time of year harvested and they also vary from where they are harvested.

Intake recommendations for iodine and other nutrients are provided by British Nutrition Foundation. Reference Nutrient Intakes (RNI). These values, which vary by age and gender, is the amount of a nutrient that is enough to ensure that the needs of nearly all a group (97.5%) are being met -

Seaweed is one of the best food sources of iodine, seaweeds tend to have high iodine levels. A 2 gms serving of our Seaspoon Seaweed Boost provide ≒ 130 mcg against an RNI of 140 mcg.

If you are aware or concerned about thyroid function we would recommend consulting your doctor before changing your diet. For people that are working with thyroid issues, it is advisable that you do not consume seaweeds in order to avoid iodine absorption. If you have any concerns about the impact on any medication, iodine or indeed any mineral/vitamin intake may have, we advise you seek advice from your doctor.

What estimates are there for vitamin and mineral content per 2gm serving?

We take British Nutrition Foundation RNI (revised Oct 2017) for healthy female adults between 19 - 50 years. The nutritional data of seaweeds vary throughout the year dependant on the time of year harvested and where they harvested and therefore we work off averages. 

Our Seaweed Boost (100% seaweed) - 2 gms serving contains a broad range of minerals and vitamins mostly ranging between ≒ 0.1% RNI to ≒ 5RNI. Vit A, Magnesium, Iron & Vit B12* can be higher between ≒5% and ≒9% RNI.

What is umami?

Umami is one of the five basic tastes (together with sweet, sour, bitter and salt) and is a rich savoury flavour that adds depth. Seaweed is naturally high in umami and when it is added to other umami foods the taste impact is greater.

Seaspoon has created a Seaweed Umami - by adding our seaweed blend to tomato, mushroom, onion, garlic, salt and pepper we have created a “umami synergy” that can be added to many dishes to add great flavour, stimulates the taste buds whilst also adding goodness.

Are there any allergens in seaweed?

May contain traces of fish, crustaceans and mulluscs. 

Is seaweed suitable for vegans and vegetarians?

Seaweed is a natural plant, which has an impressive nutrient CV and in particular, is a great source of plant protein appealing to vegans. The seaweeds we harvest grow naturally in the ocean and we don’t use chemicals or any unnatural cleaning agents there may be traces of fish, crustaceans and mulluscs present in our products.  


As with our comments above with regards iodine, high concentration of other nutrients may be problematic for some. If you are taking medication or have a relevant medical condition or have any concerns speak to your GP.

*Research is ongoing into the absorption activity levels of B12 from some seaweeds. As mentioned by Vegan Health, B12 in Dulse warrants further studies to determine absorption levels but until this research is proven they do not recommend vegans rely on seaweed as a source of B12.

Disclaimer: This material is provided for educational purposes only and IS NOT intended as a substitute for professional medical advice, diagnosis, or treatment. This information is generic and should be verified by a qualified health practitioner for specific & individual needs & requirements.