What are the health benefits of seaweed?

Algae are plants of natural, aquatic origin. There are several types, including green, brown and red. Also known as thallophytes, these are specimens made up entirely of thallus. They have no roots, stems or leaves, just a vegetative apparatus. Since they first appeared over a billion years ago, they have continued to develop. There are countless varieties, some unicellular and others multicellular. But all have antibacterial, antiviral and purifying properties. Seaweed has astonishing cosmetic and nutritional qualities.

What are the benefits of seaweed?

Seaweed, long appreciated for its nutritional qualities, is the subject of extensive research into its impact on human health. A significant narrative review published in 2023 has shed new light on this subject, based on randomised controlled trials (RCTs).

Analysis of randomised controlled trials

This study meticulously examined the effects of seaweed consumption on various aspects of human health. The results revealed limited but promising evidence of the positive influence of algae on several crucial parameters. Among these, theeffect on blood glucose metabolism stands out, suggesting a beneficial potential in the management of type 2 diabetes. In addition, significant improvements were observed in blood pressure and anthropometric measurements, which is particularly relevant for individuals suffering from hypertension.

Although the effects on blood lipids were less pronounced, they still indicate a positive trend. The review highlights the importance of further research in this area, emphasising the need for well-designed clinical trials and transparent reporting.

Overview of the health benefits of seaweed

In parallel, another study explored the overall health benefits of seaweed, both as a whole food and through its bioactive compounds, potentially exploitable in pharmaceutical applications. This research not only confirmed the value of algae as a superfood, but also highlighted their potential role in the development of natural medicines.

In addition, the study highlighted the beneficial use of algae in agriculture, highlighting their contribution to human health through chemical-free soils and crops. This represents a major step forward in the quest for sustainable agriculture that respects the environment, while protecting the health of consumers.

Hashimoto’s: Can I eat seaweed?

If you suffer from Hashimoto’s thyroiditis, an autoimmune disease in which the thyroid gland is attacked by the immune system, the question of consuming seaweed, which is rich in iodine, should be approached with caution.

According to information provided by the Mayo Clinic, iodine is an essential nutrient required for the production of thyroid hormones. A lack of iodine can lead to disorders such as an enlarged thyroid (goitre) and an abnormally low level of thyroid hormones (hypothyroidism). Seaweed, being a common source of iodine, can be beneficial in areas where iodine deficiency is common.

However, in the case of Hashimoto’s thyroiditis, if the hypothyroidism is not caused by iodine deficiency, iodine supplementation, including that from seaweed, is of no benefit and should not be undertaken. In fact, for some people with hypothyroidism, excess iodine can worsen the condition. It is therefore crucial to consult a health professional before changing iodine intake, whether through diet or supplementation, to avoid any worsening of thyroid problems.

Healthy eating

Seaweed, which has long been an integral part of our diets and health products, is an invaluable source of nutrients. They are distinguished not only by their richness in essential minerals, but also by their remarkable composition of key nutrients for health.

The main types of seaweed and their benefits

Nori: Rich in proteins and vitamins, Nori is particularly well-known for its high content of minerals such as iron and calcium, which are essential for bone health and blood circulation.
Spirulina: Presented in capsule or dried form, this algae is a superfood par excellence. It is rich in proteins, B vitamins and antioxidants, which help to boost vitality and the immune system.
Sea Lettuce: Known for its high vitamin C content, it plays a crucial role in protecting against infectious diseases and maintaining healthy skin.
Wakame: A detox ally, rich in iodine and fibre, helping to regulate thyroid function and promote digestive health.

Seaweed-based food supplements

Products like LT Labo Phyco+ Spirulina Bio Énergie et Vitalité offer a concentrated way to consume these nutrients. With a recommendation of 8 tablets a day, they can serve as a dense source of essential nutrients. Similarly, Inovance Dha Algues 30 Capsules provides omega-3 fatty acids in the form of DHA acid, contributing to brain and cardiovascular health.

Seaweed and the prevention of chronic diseases

Seaweed is particularly well known for its ability to prevent chronic diseases. Their anti-inflammatory and antioxidant properties, as well as their richness in vitamins and minerals, make them effective against diseases such as type 2 diabetes, osteoporosis and certain types of cancer. Their role in preventing cardiovascular disease and maintaining bone health is also notable, thanks to their content of essential fatty acids and minerals such as calcium and magnesium.

Body care

As well as their role as food, seaweed also has beneficial properties for body care. They are increasingly used in the cosmetics industry, both for their natural virtues and for their positive impact on the skin and general well-being.

Seaweed in cosmetics and cosmeceuticals

Seaweed has become an ingredient of choice in the formulation of many cosmetic products, from body milks, soaps and shampoos to toothpastes and sun creams. These marine organisms are rich in bioactive compounds such as polyphenols, polysaccharides, proteins, peptides, amino acids, lipids, vitamins and minerals. These compounds are responsible for many of the biological properties associated with seaweed, such as hydration, texturisation, thickening and emulsification, making it possible to develop coherent matrices in skincare products.

What are cosmeceuticals?

A cosmeceutical is a product on the borderline between cosmetics and pharmaceuticals. These products are designed to have both aesthetic and therapeutic effects on the skin. Generally, cosmeceuticals contain active ingredients in higher concentrations than traditional cosmetics, and are often marketed with the promise of having a beneficial impact on the structure and function of the skin.

Anti-ageing and skin protection effects

Studies have shown that compounds extracted from algae, such as fucoxanthin from brown algae, have anti-photoaging activities. These compounds are able to protect the skin against oxidative damage, reducing the signs of skin ageing, such as wrinkles and loss of elasticity. In addition, other compounds such as Eckol, Fucophloroethol and Astaxanthin have shown considerable potential in skin care, acting against ageing, inflammation and other dermatological problems.

Use in spas and thalassotherapies

Wrapping the body in seaweed is a common practice in spas and thalassotherapy centres. This technique encourages muscle relaxation, eliminates toxins, purifies the skin and balances the circulation. A thalasso cure enriched with seaweed is therefore highly beneficial for both body and mind.

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