Written by Kyle Ustach | BScEcon
Fact checked by Robert Iafelice, MS, RD, LDN
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Spirulina is a superfood that has exploded in popularity in recent years, as people have discovered its amazing health properties. Spirulina is a blue-green algae that is packed with a wide variety of nutrients that help improve your immune system and overall health. Essential micronutrients in spirulina can help eliminate toxins and contain potent antioxidant properties that protect against oxidative damage and other harmful diseases. Potential health benefits include anti inflammatory properties, maintaining healthy cholesterol levels, regulate blood sugar, help regulate high blood pressure, weight loss, and several others.
With all of the amazing potential properties, it’s no wonder this nutrient rich superfood has become so popular. In this article, we will help you navigate why to buy spirulina and the best spirulina supplements on the market.
9 Best Spirulina Supplements
- Overall Best: Nutrex Hawaii
- Runner-Up: Triquetra Health Spirulina
- Best Budget: NOW Supplements Spirulina
- Best Organic: KOS Organic Spirulina Supplement
- Best Powder: BulkSupplements Spirulina Powder
- Best Supergreens: Amazing Grass
- Best High Potency: BRI Spirulina
- Best Whole Plant: GNC SuperFoods Spirulina
- Best Chlorella: Good Natured Chlorella Spirulina
SFS Pick
Nutrex Hawaii
2nd Pick
Triquetra
Budget Pick
NOW
1. Overall Best Spirulina Supplement: Nutrex Hawaii
Nutrex Pure Hawaiian Spirulina is made by off the coast of Kona, Hawaii by a company that grows pure Hawaiian spirulina naturally on their farm. The lava-filtered fresh water and natural sunlight helps harvest and produce high quality spirulina supplements.
The pure Hawaiian spirulina helps boost the immune system, increase energy levels, and supports healthy cholesterol and lipid profiles. Nutrex Hawaiian spirulina utilizes a unique, patented drug system that eliminates the oxidation of fatty acids, carotenes, and enzymes which is known to occur in standard dryers, which results in higher quality spirulina powder.
The pure Hawaiian spirulina product comes in powder form, with a single teaspoon serving containing 3 grams of spirulina and each 16 oz bottle containing 151 servings.
Pros
- Certified gluten and glyphosate residue-free
- Vegan friendly
- Comes in powder or pill form
- No lactose or pesticides
Cons
- Slightly expensive
- Not organic
Get your daily dose of one of nature’s original superfoods with Pure Hawaiian Spirulina; We grow it naturally on our farm in Hawaii and pack each tablet with essential nutrients...
2. Runner-Up Best Spirulina Supplement: Triquetra Health Organic Spirulina
Triquetra Health uses its patented Parry Organic Spirulina brand to deliver what data analysis considers the most pure and nutrient dense organic spirulina tablets on the market.
Parry has been farming organic spirulina for over 42 years and offers the only raw certified organic spirulina. This means it maintains its robust “living” enzymatic activity, which makes the nutrients more bioavailable.
These come in tablets that are free of fillers, binders, gluten, soy, and gelatin. One serving contains two grams of certified organic spirulina and each bottle contains 90 servings.
Pros
- 4 major organic certifications including USDA organic
- 3rd party nutrient analysis
- Gluten-free and non-GMO
- Irradiation and contamination free
Cons
- Contains silicon-dioxide
- Mild stomach discomfort in those with food allergies
We are proud to offer the world's purest and most potent source of Organic Spirulina; don't believe us? Just look at the certifications and data; they speak for themselves...
3. Best Budget Spirulina Supplement: NOW Supplements Spirulina
NOW Supplements is one of the most reliable and cost-friendly companies on the market, as they produce nearly every supplement you can think of. Their certified-organic spirulina is rich in beta-carotene (Vitamin A) and Vitamin B12, as well as naturally occurring GLA.
The cost-efficient Now Foods Organic Spirulina has a double-strength dose of 1,000 mg and comes in 120 and 240 spirulina tablets. Each serving contains three grams of organic spirulina.
Pros
- USDA organic and non-GMO
- Naturally occurring GLA and chlorophyll
- Gluten, dairy, and allergy free
- Comes in variety of affordable dosages
Cons
- Capsule form sometimes requires taking several pills
- Higher-dose pills are large and can be difficult to swallow
NOW's Spirulina 1000 mg tablets are certified organic and non-GMO. These tablets are an easy way to get a daily dose of this nutrient rich superfood featuring...
4. Best Organic Spirulina Supplement: KOS Organic Spirulina Supplement
KOS Organic Spirulina Supplement is a 100% certified organic spirulina powder that is packed with essential nutrients. It is considered the best organic spirulina powder on the market, as it has no artificial sweeteners, fillers, thickeners, or other unnecessary ingredients.
This blue-green alga is so nutrient-rich that one health journal stated it might be the single most nutritious food on the plant. A one-scoop serving contains 3.5 grams of premium organic powdered spirulina, and each bottle has 109 servings.
Pros
- 100% pure organic spirulina powder
- Gluten free, non-GMO and dairy free
- Vegan friendly
- Subscribe-and-save option
Cons
- Spirulina powder has earthy taste
This super greens powder gives an energizing boost to blood iron levels, which promotes oxygen circulation within the body. Spirulina contains all essential amino acids & is a complete protein source...
5. Best Spirulina Powder Supplement: BulkSupplements Spirulina Powder
BulkSupplements is a well-respected company that delivers high-quality supplements in bulk. This product is consistently rated one of the best spirulina powder formulas on the market, particularly for its versatility.
This BulkSupplement spirulina powder can be taken with water, mixed into drinks, or baked into your favorite foods. It comes in a number of different bulk-size containers, with each serving containing nine grams of spirulina powder.
Pros
- Third-party tested
- Free of heavy-metals contaminants
- No extra fillers, additives, preservatives, or binders
- Subscribe-and-save option
Cons
- Spirulina powder can clump if not mixed thoroughly
BulkSupplements spirulina powder is one of the most nutrient-dense foods on the planet and is loaded with vitamins and minerals such as beta-carotene, vitamin B12, iron, magnesium...
6. Best Supergreens with Spirulina Supplement: Amazing Grass
Amazing Grass Spirulina is an organic spirulina powder blend that contains other supergreens. This certified organic blend contains organic spirulina powder, farm-fresh wheatgrass, phytonutrient-dense moringa, and kale.
This nutrient-dense spirulina powder formula supports overall health and wellness by providing beta-carotene, Vitamin K, minerals, essential amino-acids, and natural levels of chlorophyll. A one teaspoon serving is equal to 1.5 servings of greens and is designed for smoothies.
Pros
- Vegan friendly
- Gluten-free and non-GMO
- Great for boosting immune system
- Subscribe-and-save option
Cons
- Has lower concentration of spirulina due to being a blend
- Does not mix well
Organic Supergreens Powder combines farm fresh wheat grass and kale with phytonutrient-dense moringa and spirulina superfoods...
7. Best High Potency Spirulina Supplement: BRI Spirulina
BRI Spirulina uses vegetable capsules to deliver a high-potency pure spirulina supplement. Consuming spirulina powders and spirulina tablets can leave a nasty after-taste, so the vegetable capsules make them very easy to take.
These extra strength spirulina supplements support cardiovascular health, immune system support, and eye and brain health. Each gelatin capsule contains 500mg of pure spirulina and recommends four capsules per serving.
Pros
- Easy to swallow capsules
- 2 grams of spirulina per serving
- cGMP-certified facility
Cons
- Non-Vegan
- Processed in facility with milk, soy, wheat, peanuts, and fish
Instead of pressed tablets or powder you pour into a glass, we took spirulina and encapsulated it into a vegetarian capsule. Our process is...
8. Best Whole Plant Spirulina Supplement: GNC SuperFoods Spirulina
GNC SuperFoods Spirulina is a spirulina powder available in capsule form made by the industry titan GNC. GNC SuperFoods Spirulina contains a patented blue-alga whole plant powder that is a natural source of essential phytonutrients, protein, and amino acids.
Each serving size of one capsule contains 500 mg of spirulina powder and there are 100 capsules per bottle.
Pros
- Gluten free
- Gelatin capsule eliminates taste issues
- Free of sugar, yeast, and artificial flavors and coloring
Cons
- Lower dosage than most products
Whole Plant Powder Capsules Spirulina is a blue-green microalgae that is a natural source of essential phytonutrients, protein, and amino acids...
9. Best Chlorella Spirulina Supplement: Good Natured Chlorella Spirulina
Good Natured Chlorella Spirulina uses a patented, low-pressure flash expansion technique on the tablet's cracked cell wall that increases the digestive rate of the tablets by up to 80%.
Good Natured Chlorella 50/50 Tablet Mix uses organic spirulina to provide an excellent source of minerals, vitamins, chlorophyll, gamma-linolenic acid, and protein. Chlorella and spirulina combine to improve cholesterol levels, reduce blood pressure, eliminate toxins, and are rich in proteins and vitamins.
One bag contains a whopping 1,250 tablets, which is a 4-month supply.
Pros
- Vegan friendly & non-GMO
- Certified organic
- Patented technology increases absorption up to 80%
Cons
- More expensive than standalone products
Our chlorella spirulina 50/50 tablet mix combines two of the most nutrient-dense superfoods on earth. The vegan spirulina chlorella capsules support your...
What is Spirulina?
Spirulina is a type of cyanobacteria, more commonly referred to as blue-green alga, that grows in fresh and saltwater. The use of spirulina dates back to the Aztecs, who initially used the superfood as an endurance-booster and to treat diseases. Over time we learned more of its amazing health properties which have a wide range of use.
Spirulina is packed with different nutrients, as well as magnesium, potassium, and manganese. It is also a complete protein as it contains all nine of the essential amino acids. Perhaps the best part is there are only 20 calories per serving. A standard tablespoon serving has 4 g of protein, 2 g of carbs, and 1 gram of fat, which includes omega-3 and omega-6 fatty acids.
Benefits of Spirulina:
Spirulina has a wide range of uses and claimed health benefits. We cited studies that support each of the benefits below.
1. Protein Content
Spirulina is considered a complete protein, as it contains all nine essential amino acids, as well as all non-essentials. One small serving contains four grams of plant-based protein, making it great for vegans and vegetarians.
With high levels of protein and the complete amino profile, this makes spirulina a high biological-value protein (HBV). Most health experts recommend at least half of all protein should come from HBV sources, making spirulina an excellent choice in any diet that is looking to increase protein.1
2. May help repair muscle damage
When we work out we increase the production of reactive oxygen species (ROS) that results in oxidative stress. This oxidative damage can weaken and destroy proteins, leading to accelerated muscle fatigue. Multiple studies have found that spirulina may help repair muscle damage by limiting oxidative damage.
One double-blind study measured oxygen uptake, heart rate (HR), and respiratory exchange ratio (RER) in eleven untrained males performing arm-cycling exercises. They found the participants that supplemented with spirulina had greatly increased oxygen uptake during time of fatigue. In conclusion, spirulina can improve oxygen uptake, which will reduce muscle fatigue and therefore repair muscle damage.2
2. Increases energy levels
One of the main uses of spirulina is for the energy-boosting effects. The Aztecs were documented using spirulina for increased energy levels, particularly messengers who had to travel extremely long distances. It contains magnesium and several other vitamins that help energy levels as well.
Studies have shown that spirulina increases healthy lactobacillus in the intestine, which enables the body to produce vitamin B6, which helps with energy release. Spirulina is also a good source of vitamin B1, B2, B3, copper, and iron.3 Therefore, spirulina can increase our energy levels by feeding the body with essential nutrients needed for energy.
3. High in antioxidants
Phycocyanin is a plant-based protein that contains the pigment that gives spirulina its color. More importantly, phycocyanin is a powerful antioxidant that fights against free radicals and oxidative damage.
Oxidative damage can cause harm to your cells and has been linked to chronic inflammation, autoimmune disorders, and other serious diseases such as cancer. Antioxidants can help fight free radicals and viruses, as well as block the molecules that cause inflammation.
Multiple studies have shown that spirulina contains high levels of phycocyanin which can reduce inflammation, block tumor growth, and kill cancer cells. It also promotes enhanced immune function, including liver and kidney protection.4
Side-Effects Of Spirulina
Whenever you are looking to start a new supplement, it's important to consult your doctor about possible side-effects or interactions. Spirulina is concentrated and super high in nutrients so it might pose a health threat to certain individuals. Be sure to follow the recommended dose to avoid any issues. Some spirulina that is harvested in the wild could be contaminated with heavy metals and bacteria that contain dangerous toxins. Most side-effects only show in people with preexisting conditions or diseases.
What to look for when buying Spirulina supplements:
With the boom in popularity in recent years, several new companies have launched their own spirulina brands. It's one of the most sought after supplements on the market, but we want to make sure you find the proper brand for your goals.
1. Ingredients
The supplement should contain Spirulina (Arthrospira platensis). The minimum amount should be 500 mg up to 3,000 mg, which is a standard dose and has 10 calories and 2 g of protein. The only other ingredient you might find would be the binder, typically silicon dioxide, or the vegetable capsule that holds the spirulina powder.
These products come in either gelatin capsules, tablet form, or in powdered form which can be mixed into water and shakes. When looking at ingredients of spirulina powder, organic sources are the best options.
2. Testing/Transparency
If the product states it is organic it should be certified by the USDA. It should be packaged and tested for quality control in the United States. Look for the Current Good Manufacturing Practices (cGMP) stamp, which guarantees certified facilities. Also look for third-party testing to ensure a high quality spirulina supplement that is herbicide free, safe from heavy metals, and free of harmful bacteria. Look for official vegan and organic certification as well.
3. Price
Since everyone will have their own dosage schedules, the best way to compare price is on a per-dosage basis. Consider a subscribe-and-save or bulk option to make the most out of the price.
4. Reviews
Take advantage of online reviews, as they can be a great way to help find the best product for your needs. This is also a great way to see if anyone suffered any unwanted side effects and if the brand produced the expected benefits.
Spirulina Supplements FAQs
What is Spirulina supplement used for?
Spirulina is a superfood that is rich in antioxidants and other healthy nutrients. It is most commonly used for energy, pain-relief, anti-inflammation, and cognitive-boosting properties. Other uses include immune system support, allergy relief, heart health, and cancer-killing properties.
When should I take spirulina?
Although it is perfectly fine to take spirulina at any time of the day, there are two best times to maximize effects. By taking it first thing in the morning guarantees your daily intake of vitamins and can provide a boost of energy for the rest of the day. The second best time is before meals, as it can help the way our body processes food. It can increase insulin sensitivity, which means you store less fat and use energy more efficiently.
Is spirulina good for weight lifting?
Yes, spirulina has multiple benefits for weight lifting. It attacks oxidative damage that fatigue the muscle, therefore increasing muscle strength and endurance. It is also a complete protein source that contains all the essential amino acids, making it a great muscle-builder. Along with a healthy diet, spirulina supplements can be a wonderful aid for weightlifting.
Who should not take spirulina?
Since spirulina might affect blood sugar levels, people with diabetes should consult with their doctor. People with autoimmune diseases like Lupus, multiple sclerosis, and arthritis can also experience worsened symptoms. People with a Vitamin B12 deficiency should not take it, as it is not well-absorbed by the body. Women who are pregnant should also avoid taking it due to potential toxicity. It is always recommended to consult with your doctor for possible interactions if you take any medications or other dietary supplements.
Summary
Spirulina is a powerful superfood that is packed with potent antioxidants and loaded with high-quality protein. It has a number of uses including anti-inflammation, pain-relief, allergies, protein content, energy-boosting properties, and several other benefits. Our top pick comes from Nutrex which is made from pure Hawaiian sourced spirulina.
Get your daily dose of one of nature’s original superfoods with Pure Hawaiian Spirulina; We grow it naturally on our farm in Hawaii and pack each tablet with essential nutrients...
If you made it this far, you might be interested in our post the covers the Best Greens Powders on the market.
References
- AlFadhly, Nawal K. Z., et al.“Trends and Technological Advancements in the Possible Food Applications of Spirulina and Their Health Benefits: A Review.” Molecules, vol. 27, no. 17, 30 Aug. 2022, p. 5584, 10.
- Gurney, Tom, and Owen Spendiff. “Spirulina Supplementation Improves Oxygen Uptake in Arm Cycling Exercise.” European Journal of Applied Physiology, vol. 120, no. 12, 5 Sept. 2020, pp. 2657–2664, 10. Accessed 3 Dec. 2020.
- Karkos, P. D., et al. “Spirulinain Clinical Practice: Evidence-Based Human Applications.” Evidence-Based Complementary and Alternative Medicine, vol. 2011, 2011, pp. 1–4,. Accessed 27 Nov. 2019.
- Grover, Priyanka, et al. “C-Phycocyanin-a Novel Protein from Spirulina Platensis- in Vivo Toxicity, Antioxidant and Immunomodulatory Studies.” Saudi Journal of Biological Sciences, vol. 28, no. 3, Mar. 2021, pp. 1853–1859, Accessed 12 Sept. 2022.
Kyle Ustach
Author