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Spirulina algae | The Extraordinary Benefits of Spirulina Powder
Spirulina algae The Extraordinary Benefits of Spirulina Powder

Spirulina algae
The Extraordinary Benefits of Spirulina Powder

Date: May 21, 2020

Spirulina algae is a filamentous single-cell microalga that lives in the fresh-brackish waters of tropical or subtropical alkaline pH lakes, such as those of the Mexican plateau, in China and Chad. In these unique waters there is a high concentration of sodium bicarbonate, potassium salts, magnesium and selenium.

Spirulina: origins and characteristics

coltivazione di spirulina

Spirulina cultivation.


Spirulina is characterized by its green-blue color, its classic spiral shape (which determines its name), and its marked photosynthesis capacity. Despite falling into the category of blue algae, spirulina was subsequently inserted into the realm of bacteria, given the high genomic similarity with cyanobacteria.

The Aztecs and Mayans considered it a sort of esoteric food capable of giving extraordinary energy and vitality to those who took it. In modern times the spirulina alga has been defined as a superfood for its nutritional properties and for the numerous benefits enhanced by NASA's aerospace nutritional medicine and by the European Aerospace Agency, going from being considered "food of the gods" to "food of the future" by FAO in 2008.

Benefits and properties of spirulina

Spirulina, commercially available especially in the powder, flakes or capsules form, is recommended by nutrition experts in various areas related to malnutrition or as a tonic-tonic for athletes. It is characterized by a very high digestibility, favored by the conformation of the cellulose-free structural portion of the alga. Spirulina is also used for its detoxifying, antioxidant, and anti-inflammatory properties.


It also appears to have the potential to lower total cholesterol, LDL cholesterol, and triglycerides, while it could stimulate the production of HDL cholesterol, the so-called "good cholesterol". Spirulina alga is used by some as an adjuvant in the treatment of high blood pressure, the main driver of many diseases including heart attack, stroke, and chronic kidney disease.

Nutritional values

Spirulina algae presents a series of essential nutrients that are highly assimilable for our body, in particular:

  • Proteins. Spirulina is made up of proteins for about 60-70% of the dry weight, compared to 20% (proportionally) on average for beef or 13% for eggs. It also has a high concentration of all essential amino acids (50% of the total), which is exceptional for a vegetable. Furthermore, spirulina proteins are highly digestible because seaweed does not have a cell membrane. Our body, therefore, has a net use of proteins (NPU) which reaches between 53 and 61%.
  • Beta-carotene. This precious microalga contains high amounts of beta-carotene (which converts to vitamin A), as well as vitamin B12, B complex vitamins, various essential trace elements, gamma-linolenic acid (GLA).
  • Mineral salts. Spirulina algae is particularly rich in iron with high bioavailability, appreciable by anemic and endurance sports subjects. It also has a very high concentration of calcium, magnesium, and phosphorus, minerals involved in over 300 enzymatic reactions of energy metabolism, and important for the mechanisms associated with nerve transmission, contraction and muscle recovery, prevention of cramps, stress control and to protein synthesis. The presence of these trace elements is an additional added value for endurance sports athletes, who easily tend to be sensitive to hypomagnesemia (magnesium deficiency).
  • Phycocyanin. The characteristic blue pigment with a chemical composition very similar to hemoglobin. This precious pigment allows an antioxidant and anti-inflammatory action particularly appreciated by athletes for the potential for contrast and faster recovery from DOMS (delayed onset muscle soreness), the typical post-workout muscle pain caused by microtrauma to the muscles.
  • Vitamins A, C, E. Of great relevance is the antioxidant action capable of protecting against the attack of free radicals and the damage they cause to the body (premature aging, neurodegenerative diseases, some tumor forms, and atherosclerotic diseases) due to vitamins A, C, E.
  • "Good" fats. Certain importance also comes from the presence of fatty acids contained in monounsaturated and especially polyunsaturated acids, with a predominance of omega 6 compared to omega 3 and high percentages of linoleic acid, alpha-linoleic and gamma linoleic. Cis-linoleic acid and gamma-linolenic acid (GLA) activates the production of type 1 prostaglandins (PGE1) which contribute to the enhancement of our body's defenses by increasing lymphocytes and macrophages.

Spirulina uses

alga spirulina in capsule e polvere

Spirulina algae in capsules and powder.


The spirulina intake is recommended for its protective properties from radiation damage, acting as a purifying and detoxifying, in particular for the liver, thanks to the phycocyanins and the very rich concentration of chlorophyll. Chlorophyll can chelate many heavy metals and toxins present in the body, proving to be an excellent detoxifying agent capable of helping to prevent and neutralize the toxic effects of substances such as mercury, arsenic, cadmium, pesticides, toxins from substances food chemicals, promoting their expulsion from the body.

It is curious and interesting to note that in 1986, spirulina was used to treat problems resulting from the Chernobyl nuclear accident, where doctors from the Minsk Radiotherapy Institute administered five grams of spirulina per day for 45 days to some of the children exposed to nuclear radiation, detecting a faster improvement than children who had not taken it.

Speaking of the immune system, spirulina has been shown to have properties that inhibit the release of histamine from mast cells. In a recent double-blind randomized study, spirulina was administered daily for 12 weeks to a group of allergic rhinitis patients. It then emerged that a high dose of algae significantly reduced inflammatory cytokine levels (by 32%), demonstrating interesting protective effects against seasonal allergic rhinitis.

Dosage and administration

The recommended dosage is 1 to 3 grams of spirulina per day. Athletes and vegans who need more protein and iron can take 6-9 grams throughout the day. However, it is recommended to start gradually with the intake, and then increase the doses.

The ideal time to take spirulina would be in the morning at breakfast, as it promotes a satiating and stabilizing effect on blood sugar which avoids hunger attacks until lunch. Sportsmen can take it as a support to performance before training, or to speed up muscle recovery immediately after, with other supplements or with food, without any particular interaction.

Warnings and contraindications

Spirulina in the form of a powder or supplement is considered safe in itself but, in some cases, it is better to be careful. People with autoimmune diseases such as rheumatoid arthritis, multiple sclerosis, and lupus should avoid spirulina supplements because seaweed can interact with drug therapies, such as cyclosporine and methotrexate. Spirulina can also interfere with antiplatelet therapies, particularly with drugs that slow down blood clotting such as Warfarin. This alga can also cause rashes and itching of the skin or give rise to a darker color of the stool, given its purifying/detoxifying action on the organism. In the presence of severe allergies to seafood and cases of hyperthyroidism, before taking spirulina it is always good to consult your doctor.




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