For centuries, red algae such as Sea Moss (also called cartilage seaweed, Irish Moss) have been used as a natural remedy. The benefits of Sea Moss include strengthening the immune system, digestive and skin problems, inflammation and much more. The cartilage kelp or Irish Moss is therefore considered a superfood! Even dried and as a food supplement, Irish Moss has plenty of vitamins and nutrients.

For healthy people without pre-existing conditions, Irish Moss is considered quite safe with many health-promoting properties. Of course, it is important that "normal" amounts are taken and that the recommended Sea Moss dosages are followed.

If the dosage is too high, Irish Moss can cause increased side effects. Above all, there is a risk that too high dose of iodine will be absorbed by red algae. Iodine is essential for the body, but excessive consumption can be harmful. It is especially true for people with thyroid problems (see below).


Possible side effects of Sea Moss are:

> diarrhoea;

> low blood pressure;

> abdominal cramps;

> possibly an allergic reaction to seaweed/carrageenan;


if iodine intake is too high:

> nausea;

> diarrhoea;

> vomiting;

> possibly impairment of thyroid function;


Can you prevent Sea Moss side effects?

Yes. At least healthy individuals without pre-existing conditions can reduce the risk of Sea Moss side effects. Here are some simple tips and recommendations:

> Buy Sea Moss / Irish Moss from recognised superfoods suppliers.

> Always follow Sea Moss red algae dosage recommendations.

> If you have any pre-existing conditions (especially thyroid disorders or allergies), consult your doctor before taking Sea Moss.

> Start with the lowest dose and wait for the body's reaction, as each person reacts differently to nootropics. 

> Do not exceed the maximum daily Sea Moss dose.

> A healthy diet and lifestyle are also important when taking supplements.


Interesting facts about Irish Moss dosages and the correct intake can be found in our blog: Sea Moss Dosage.


For whom is Sea Moss nootropic not suitable? 


  1. Thyroid disorders

As with almost all medicines and dietary supplements, there are people for whom individual components of red algae extract are unsuitable.

In the case of Sea Moss, the high iodine content is particularly relevant. Iodine is essential for the metabolism and a healthy thyroid gland, but too much iodine can lead to thyroid dysfunction. And in people who already suffer from thyroid diseases, too much (or too little iodine) can be dangerous.

For this reason, people with thyroid disorders should definitely discuss taking Irish Moss and seaweed with specialists. Sea Moss may not be suitable for them. The BfR advises people with thyroid disorders to generally avoid seaweed products.

  1. Pregnancy and breastfeeding

Although many women take Irish Moss as a dietary supplement to support hormone balance and conception, nootropics are not suitable for everyone during and after pregnancy. Therefore, Irish moss is not recommended for use during pregnancy, except on the direct recommendation of a doctor.


  1. Allergy to carrageenan

Irish Moss and red algae are used to produce carrageenan (a food additive), among other things. However, there are people who are allergic to carrageenan.

If a carrageenan allergy is known, severe side effects from Sea Moss are to be expected and should therefore not be taken.


  1. Interactions with medicines

Side effects of Sea Moss may occur in certain pre-existing conditions and if prescription medications are taken simultaneously; in addition, the effectiveness of the medication may be affected.


It is known to occur with:

> Antihypertensives (blood pressure lowering drugs) with drowsiness and dizziness as possible side effects of Sea Moss seaweed;

> Blood thinners (anticoagulant drugs);


Note. It is advisable to consult with medical professionals when taking other agents and medications simultaneously and to wait about 60 minutes after taking Irish Moss before using other agents.


Can I buy nootropics without a prescription?

At you can order Sea Moss and also buy nootropics.

You can also buy superfoods at Raw Powders: Lion's Mane capsules, Lion's Mane powder, Cordyceps capsules, Cordyceps powder, Chaga, Acai, Reishi capsules, Reishi powder, Goji berries, Spirulina capsules, Spirulina powder, Maca Capsules, Maca powder, Chlorella.

By the way, Irish Moss seaweed capsules are vegan at RawPowders and very popular as a dietary supplement for vegetarians and vegans due to the many vitamins and nutrients.




Text author:
Kay Svegler
Communications, PR, American Studies, University of Leipzig
Journalist and freelance writer (e.g. Süddeutsche Zeitung, BILD, MDR etc.)
Former Senior PR Manager for Fischer Appelt, Sustainability and Diversity Manager for DKB