7 Best Spirulina Supplements of 2023

Spirulina, also known as Arthrospira platensis is a blue-green alga that has been discovered to possess antimicrobial, antiviral, antitumor, immunomodulatory, antiallergic and antihypertensive properties. Moreover, spirulina consumption has been linked to the prevention or management of metabolic syndrome symptoms.

Best Spirulina Supplements - Our Top Picks

The list is based on recommendations by third party organizations, online reviews and popularity on search results and forums. Although there are many spirulina supplement customer reviews on many online sites, we have curated some of the helpful ones below.

Here are the best spirulina supplements that you can buy over the counter or online today.

1. NOW Supplements, Certified Organic Spirulina Tablet 1000 mg

NOW Supplements, Certified Organic Spirulina Tablet 1000 mg

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NOW spirulina tablets have twice the spirulina (1,000 mg per tablet) as in our regular strength product (500 mg per tablet). It is an easy way to get a daily dose of this nutrient rich superfood featuring beta-carotene (vitamin a) and vitamin b-12.

– USDA organic, non-GMO, genuine whole foods, vegan/vegetarian, soy free, sugar free
– GMP quality assured

Ratings: 4.6 out of 5 – more than 5,000 global ratings
Amazon Best Seller: #13 in Spirulina Herbal Supplements

Great for digestion. Energy and weight management. Start with one a a day.
- NOW Supplement, Certified Organic Spirulina Review

Another excellent product that my dietitian recommended is this spirulina supplement from NOW Foods. It has a vegan and organic certification, and you get the recommended daily dose of 3 g of spirulina. What a lot of people like about it is that you won't need to take other dietary supplements to boost your intake of B12, so you can save a bit of money and still get all the essential nutrients.

2. Nutrex Hawaii, Pure Hawaiian Spirulina Tablet 500 mg

Nutrex Hawaii, Pure Hawaiian Spirulina Tablet 500 mg

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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 for overall health. Our spirulina is vegetarian, vegan, and free of GMOs, gluten, lactose, soy, pesticides, herbicides, and solvents

Hawaiian spirulina is an excellent source of vitamins A, K1, K2, B12, iron as well as amino acids, carotenoids, antioxidants, and phycocyanin. They support healthy aging by boosting the immune system, provides nourishment for a healthy and active lifestyle, and supports normal cholesterol and lipid profiles.

Amazon Best Seller: #8 in Spirulina Herbal Supplements

Ratings: 4.6 out of 5 – more than 7,700 global ratings

Wow, this stuff is awesome! When I use this product I defiantly notice my memory is sharper. I recently forgot a grocery shopping list, and when I was at the store, I clearly remembered everything on my list, which is so not me! I find this product also does a fabulous job suppressing my appetite as well. I have been loosing weight since taking this product. Down about 5 pounds and lost 2 inches around my waste. It is so nutritious, I find I can’t take it all the time, so I do give myself breaks from it. Very pleased!

3. Micro Ingredients Organic Spirulina Supplement (Raw Spirulina Organic Filler Free)

Micro Ingredients Organic Spirulina Supplement (Raw Spirulina Organic Filler Free)

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USDA organic spirulina tablet from spirulina powder organic (arthrospira platensis), 3000mg per serving, 720 counts (4 months supply). Spirulina is loaded with vegan protein, chlorophyll, fiber, amino acids (omega 3 6 9, GLA, arginine), fatty acids, immune vitamins (vitamin a, vitamin b2, vitamin b12, vitamin c, vitamin k, biotin), minerals (magnesium, calcium, potassium & zinc vitamin), flavonoids, phytonutrients, and antioxidants.

– powerfully supports energy, colon health, digestive function, and immune system.
– no GMOs, no irradiation, no additives, no preservatives, no artificial colors, no flavors, no soy, and no gluten.
– 3rd party lab tested for purity and safety. Made in the USA.

4.6 out of 5 – more than 6,000 global ratings

Amazon Best Seller: #2 in Spirulina Herbal Supplements

Micro Ingredients Organic Spirulina Supplement Review
Very easy to swallow no bad after taste best quality that i have found no other company compares, helps me control my blood pressure more boost my energy and loss some weight ton of benefits from these.

4. Natural Elements Organic Spirulina Powder

Natural Elements Organic Spirulina Powder

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– Get the ultimate benefit:
Taking our organic spirulina will help you feel an increase of energy and vitality, brain support, immune system support, eye health, and even help with weight loss keeping you on track for your daily goals.

– Stay away from the low-quality spirulina:
Unlike most spirulina brands out there, we pride ourselves on bringing you only the best by doing an extensive search to provide you with the top tier level organic spirulina that is pesticide & herbicide free, microcystin free, gluten-free, non-GMO, and 100% vegetarian & vegan.

– Grown with you in mind :
We were on a mission to find the best quality spirulina in the world. We were led to several places in both California and Hawaii to give you the highest quality of spirulina out on the market. Our spirulina is more nutritious than chlorella by giving you the highest concentration of protein of any plant, animal, or herb on a gram per gram basis.

– Great nutrition:
Our spirulina is rich in beta-carotene, vitamin b12, folic acid, minerals, essential fatty acids proteins, as well as many other vitamins.

4.5 out of 5 – more than 1,250 global ratings

Natural Elements Symnutrition Spirulina Review
Amazing health benefits. Easy to mix in with other foods so the taste is good. It comes with directions for the diffent ideas. I felt so much better after using it. Energy level is higher and can do more at the gym making me lose more weight.

5. SYMNUTRITION Spirulina Powder

SYMNUTRITION Spirulina Powder 2000mg — 2lbs / 452 Servings

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This spirulina is formulated purely using a first-rate extract. The formula is free from any redundant fillers; vegan and gluten free. Professionally manufactured and assessed in a cGMP-registered facility in US; certified for potency, purity, and integrity.

– warranty: we have a 180-days (6 months), no questions asked, full refund policy.
– instructions: take one serving (1/2 teaspoon) one time per day. Do not exceed the recommended dose.

4.6 out of 5 – more than 230 global ratings

Symnutrition Spirulina Review
I love this spirulina powder, I add it to my morning shake everyday. It’s blends and mixes so easily. Not only does it give me energy, but it also tastes great! Absolutely recommend it!

6. BioOptimal Organic Spirulina Tablets

BioOptimal Organic Spirulina Tablets

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BioOptimal Organic Spirulina Tablets are organic, non-GMO, non-irradiated, & 100% raw spirulina with ZERO additives or coatings. In addition, BioOptimal Organic Spirulina Tablets are low temperature dried maintaining live enzymatic activity & optimal nutritional value.

– no additives, non-gmo, non-irradiated, vegan with no capsules, coatings or fillers
– nature’s most nutrient dense superfood, wide spectrum of vitamins & minerals, including plant based protein that support vitality & provide energy*

4.5 out of 5 – more than 650 global ratings

BioOptimal Organic Spirulina Tablets Review
I can tell a huge difference in my digestive system. I no longer crave sweets & I have lost weight!

7. VibraxLabs Spirulina Capsules

VibraxLabs Spirulina Capsules

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– High quality:
Vegetarian safe. Very easy to take & no aftertaste. We’ve encapsulated your daily dose of fresh spirulina powder into easy swallow vegie caps so that it will not leave horrible green staining in your teeth. Plus every bottle goes through rigorous quality control and is made in a gmp-quality certified facility in the usa & produced from pure uncontaminated waters in the usa. Free from heavy metals, radiation, non-gmo and gluten free

– Real results you can feel:
Our spirulina detox pills are specifically formulated to promote your cell rejuvenation, partnered with a healthy lifestyle, support your natural detoxification, benefit your eye, brain & fresh skin health, help you slow down your cellular damage, support better sleep, feeling good and looking shiny like gold! You will feel this working from the very first months you put it to use, and that’s a good thing as it’s how you know it’s actually working!

– Energy boost is an added bonus:
It is such a pleasure to come home after a full day of work, and have the energy and enthusiasm to enjoy the evening! Please note that it is a sister company to vibraxlabs supplements.

4.5 out of 5 – more than 350 global ratings

VibraxLabs Spirulina Caplues Review
I just took it in combination with chlorella for detox purposes. So far I’m happy plus it’s very easy to take.


a. Who Should Not Take Spirulina?

i. Autoimmune disease
Multiple sclerosis (MS), lupus (systemic lupus erythematosus, SLE), rheumatoid arthritis (RA), pemphigus vulgaris (a skin ailment), and others are autoimmune illnesses. The immune system may become more active as a result of blue-green algae, which might worsen the symptoms of auto-immune diseases. It’s advised to avoid utilizing blue-green algae if you have one of these diseases.

ii. Surgery
Blue-green algae may reduce blood sugar levels during surgery. Best to stop using blue-green algae at least 2 weeks before a scheduled surgery.

iii. Bleeding conditions / Using blood thinnersSpirulina has an anticoagulant effect, which means it thins your blood and makes it take longer for blood to clot. If you have a bleeding condition or are using blood thinners, you should avoid spirulina.

b. Is Spirulina Safe?

Spirulina is considered safe. However, it is possible that they can be contaminated with other substances that may result in toxicity. Therefore, best to buy spirulina from a trusted brand that undergo purity test.

If you are pregnant or breastfeeding, consult your doctor before taking spirulina.

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