Seaweed, or sea vegetables, encompasses various forms of algae thriving in the ocean. These range in color from red to green, brown, and black, serving as a vital food source for marine life. While seaweed flourishes along rocky coastlines worldwide, it is most commonly consumed in Asian countries like Japan, Korea, and China. Its versatility allows for inclusion in numerous dishes such as sushi rolls, soups, stews, salads, supplements, and smoothies. Notably, seaweed is highly nutritious, offering significant benefits even in small quantities. African seaweed oil offers a wide range of benefits, making it an excellent addition to your diet and skincare routine.
Africa, boasting over 30,000 km of coastline, hosts a rich marine ecosystem teeming with diverse seaweed and algae species. Countries like South Africa, Mozambique, and Tanzania are pioneering sustainable harvesting practices to harness these natural resources for cosmetic applications.
7 Science-Backed Benefits of Seaweed
Seaweed can contain antioxidants and beneficial nutrients, including iodine, tyrosine, vitamins, and minerals. It may support heart and gut health and improve your blood sugar balance. Here are several science-backed benefits of seaweed:
1. Supports Thyroid Function
Your thyroid gland releases hormones to help control growth, energy production, reproduction and the repair of damaged cells in your body. Your thyroid relies on iodine to make hormones. Without enough iodine, you may start to experience symptoms like weight changes, fatigue, or swelling of the neck over time. Seaweed has the unique ability to absorb concentrated amounts of iodine from the ocean. Seaweed also contains an amino acid called tyrosine, which is used alongside iodine to make two key hormones that help the thyroid gland do its job properly.
The iodine content varies greatly depending on the type, where it was grown, and how it was processed. In fact, one dried sheet of seaweed can contain between 16 mcg per gram and 2,984 mcg/g, or 11-1,989% of the DV. Examples include:
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- Nori: 37 mcg per gram (25% of the DV)
- Wakame: 139 mcg per gram (93% of the DV)
- Kombu: 2523 mcg per gram (1,682% of the DV)
2. Rich Source of Vitamins and Minerals
Each type of seaweed has a unique set of nutrients. Sprinkling some dried seaweed on your food not only adds taste, texture, and flavor to your meal, but it’s an easy way to boost your intake of vitamins and minerals. Seaweed also contains small amounts of vitamins A, C, E, and K, along with folate, zinc, sodium, calcium, and magnesium.
Here’s a look at the nutrients found in a 7-gram serving of dried seaweed:
- Calories: 20
- Carbs: 1.7 grams
- Protein: 4 grams
- Fat: 0.5 gram
- Fiber: 0.3 grams
- Riboflavin: 20% daily value (DV)
- Thiamin: 14% DV
- Iron: 11% DV
- Manganese: 6% DV
- Copper: 47% DV
The proteins present in some seaweeds, such as spirulina and chlorella, contain all of the essential amino acids. This means seaweed can help ensure you get the full range of amino acids. Seaweed can also be a good source of omega-3 fats and vitamin B12.
3. Protective Antioxidants
Antioxidants can make unstable substances in your body called free radicals less reactive, making them less likely to damage your cells. Furthermore, excess free radical production is considered to be an underlying cause of several diseases, such as heart disease and diabetes. In addition to containing the antioxidant vitamins A, C, and E, seaweed boasts a wide variety of beneficial plant compounds, including flavonoids and carotenoids. These have been shown to protect your body’s cells from free radical damage.
A lot of research has focused on one particular carotenoid called fucoxanthin. It’s the main carotenoid found in brown algae, such as wakame, and it has 13.5 times the antioxidant capacity of vitamin E. While the body does not always absorb fucoxanthin well, absorption may be improved by consuming it along with fat.
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4. Supports Gut Health
It’s estimated that you have more bacteria cells in your body than human cells. An imbalance in these “good” and “bad” gut bacteria can lead to sickness and disease. Seaweed is an excellent source of fiber, which is known to promote gut health. Additionally, particular sugars found in seaweed called sulfated polysaccharides have been shown to increase the growth of “good” gut bacteria. These polysaccharides can also increase the production of short-chain fatty acids (SCFA), which provide support and nourishment to the cells lining your gut.
5. May Aid Weight Loss
Seaweed contains a lot of fiber, which is believed to provide little to no calories. The fiber in seaweed may slow stomach emptying, too. This helps you feel fuller for longer and can delay hunger pangs. Seaweed is also considered to have anti-obesity effects. In particular, animal studies suggest that a substance in seaweed called fucoxanthin may help reduce body fat. Although the results in animal studies appear very promising, it’s important that human studies are conducted to verify these findings.
In a 2023 clinical trial of 28 patients with metabolic syndrome, fucoxanthin was found to reduce body weight, blood pressure, and triglyceride levels. Further human studies are needed.
6. Reduces Heart Disease Risk
Heart disease is the leading cause of death worldwide. A 2023 meta-analysis found that brown seaweed intake significantly decreased the levels of total cholesterol and LDL. Heart disease can also be caused by excessive blood clotting. Seaweed contains carbohydrates called fucans, which may help prevent blood from clotting.
Researchers are also starting to look at peptides in seaweed. Initial studies in animals indicate that these protein-like structures may block part of a pathway that increases blood pressure in your body. However, large-scale human studies are required to confirm these results.
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7. May Reduce Type 2 Diabetes Risk
Diabetes occurs when your body is unable to balance your blood sugar levels over time. Interestingly, seaweed has become a research focus for new ways to support people who are at risk of diabetes. A 2023 meta-analysis found that brown seaweed consumption significantly improved postprandial blood glucose, glycated hemoglobin (HbA1c), and Homeostatic Model Assessment of Insulin Resistance (HOMA-IR).
What’s more, another substance in seaweed called alginate prevented blood sugar spikes in animals after they were fed a high-sugar meal. It’s thought that alginate may reduce the absorption of sugar into the bloodstream.
Why Sea Moss Is Going VIRAL!
Sea Moss: A Closer Look
Sea moss, also known as Irish sea moss or Chondrus crispus, is a type of red algae that offers numerous nutritional benefits. It's a source of essential nutrients like calcium, iron, magnesium, and folate. For men, sea moss may help maintain healthy testosterone levels and support fertility. It is gaining popularity as a dietary supplement due to the myriad nutritional benefits it may provide.
Benefits of Sea Moss
- Rich in Vitamins and Minerals: Sea moss contains minerals like potassium, calcium, and magnesium.
- Supports Testosterone Levels: Sea moss contains zinc, which plays a role in maintaining healthy testosterone levels and fertility.
- Promotes Gut Health: Sea moss is rich in prebiotics and includes some fiber, both factors that help the gut function optimally.
- Supports Heart Health: Seaweeds, in general, have been studied for their ability to improve symptoms of arthritis, diabetes, autoimmune, ocular, and cardiovascular diseases.
- Healthy Thyroid Function: Iodine plays a role in healthy thyroid function, which is regulated by thyroid-stimulating hormone (TSH).
- Supports Immune System: Sea moss may help support a healthy immune system as it provides a source of iron along with vitamin C and vitamin A.
Seaweed and Algae in Skincare
Seaweed and algae are high in important elements as they are microbial plants full of all the nutrients, vitamins, trace minerals, and antioxidants. The skin has rich skin-supporting compounds that hydrate the skin, essential for anti-aging and protection. These are proteins like fucoidan, a sulfated polysaccharide that is an excellent moisturizer and diuretic. The second is astaxanthin, a potent antioxidant that helps the skin shield itself against the harmful effects of the environment.
Innovation in skincare is a constant process, and finding effective ingredients is to be considered. In this search for holistic skincare solutions, seaweeds and algae, which are marine African ingredients, play a significant role in protecting the skin from ageing, cancer, and sunburn. These aquatic plants, variegated and rich on numerous coastlines of Africa with medicinal properties, are now being added to the list of ingredients in skin care formulations, making them more productive.
Benefits in Skincare
- Hydration and Moisturization: Seaweed and algae always have the innate capacity to trap and hold onto moisture, which has a natural benefit to the body.
- Anti-Aging Properties: The antioxidants appropriate in these marine-based components aid in the fight against free radicals that often lead to premature ageing of individuals.
- Skin Protection and Repair: Algae and seaweeds endow skin with an extra protective shield against the radical effects of environmental stress, such as UV rays and pollutants.
- Detoxification: These lovers of the sea also contain a detoxing constituent. That is, they help the skin get rid of poisons and dirt.
Possible Dangers of Seaweed
Although seaweed is considered a healthy food, there may be some potential dangers to consuming too much.
Excess Iodine
Seaweed can contain a very large and potentially dangerous amount of iodine. Fortunately, in Asian cultures, seaweed is commonly eaten with foods that can inhibit the uptake of iodine by the thyroid gland. These foods are known as goitrogens and are found in foods like broccoli, cabbage, and bok choy. Additionally, it’s important to note that seaweed is water-soluble, which means cooking and processing it can affect its iodine content.
Heavy Metal Load
This poses a health risk, as seaweed can also contain large amounts of toxic heavy metals such as cadmium, mercury, and lead. That said, the heavy metal content in seaweed is usually below the maximum concentration allowances in most countries.
A 2017 study analyzed the concentration of 20 metals in 8 different seaweeds from Asia and Europe.
How to Incorporate Seaweed into Your Diet
People can add seaweed to their diet in many ways. These include:
- Substituting tortillas, bread, and wraps with dried nori sheets used in sushi.
- Flavoring bean soups with kombu. This can reduce the risk of gas due to kombu’s healthful enzymes.
- Roasting seaweed with a small amount of oil and salt to satisfy a salty craving.
- Using toasted seaweed or seaweed flakes as a topping on grains, such as rice or quinoa. This may help reduce the amount of salt or soy sauce a person uses.
- Adding seaweed to vegetable soup. This is a good option for people who do not enjoy the flavor of seaweed.
Frequently Asked Questions
Does seaweed make you poop?
Seaweed contains prebiotic fiber, which may cause people to poop and help to alleviate constipation.
Is seaweed good for the skin?
Using cosmetics containing seaweed may be beneficial for a person’s skin. The anti-inflammatory effects of seaweed plus its high antioxidant and bioactive compound content may help to improve skin health.
Can you eat too much seaweed?
It is possible to eat too much seaweed, especially if it contains large amounts of iodine, which can affect thyroid health.
| Seaweed Type | Iodine Content (mcg per gram) | % of Daily Value (DV) |
|---|---|---|
| Nori | 37 | 25% |
| Wakame | 139 | 93% |
| Kombu | 2523 | 1682% |
