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Updated: 06 Apr 2026

10 Best Spirulina Supplements Antioxidants

#1 Best Pick
NOW Supplements, Certified Organic, Spirulina 1000 mg (Double Strength), Rich in Beta-Carotene (Vitamin A) and B-12 with Naturally Occurring GLA, 240 Tablets

NOW Supplements, Certified Organic, Spirulina 1000 mg (Double Strength), Rich in Beta-Carotene (Vitamin A) and B-12 with Naturally Occurring GLA, 240 Tablets

Brand: NOW
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  • 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 beta-carotene (Vitamin A) and Vitamin B-12.
  • This double strength product has twice the Spirulina (1,000 mg per tablet) as in our regular strength product (500 mg per tablet).
  • USDA Organic, Non-GMO, Genuine Whole Foods, Quality GMP Assured, Vegan/Vegetarian, Soy Free, Sugar Free
  • GMP Quality Assured: NPA A-rated GMP certification means that every aspect of the NOW manufacturing process has been examined, including our laboratory/testing methods (for stability, potency, and product formulation).
  • Packaged in the USA by a family owned and operated company since 1968.
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#2 Best Value
Synergy Natural Organic Spirulina 100 Tablets 500mg

Synergy Natural Organic Spirulina 100 Tablets 500mg

Brand: Synergy Natural
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  • Natures richest source of protein than fish or meat
  • Rich in chlorophyll and 58 times more iron than spinach
  • A great source of antioxidants and contain beta-carotene
  • Rich and concentrated source of essential fatty acids
  • A food supplement maintaining health, energy and optimum weight
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#3 Budget Pick
Green Nutritionals Hawaiian Pacifica Spirulina 200 tablets - Vegan Friendly

Green Nutritionals Hawaiian Pacifica Spirulina 200 tablets - Vegan Friendly

Brand: Hawaiian Pacifica
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  • Ingredients: POWDER Ingredients: 100% Pure Hawaiian Spirulina (Arthrospira platensis) TABLETS (500mg) Ingredients: Hawaiian Spirulina 98.5% (Arthrospira platensis), Silica 1%, Chicory Inulin 0.4%, Vegetable Magnesium Stearate 0.1%.
  • Green Nutritionals Hawaiian Pacifica Spirulina 200 tablets - Vegan Friendly
  • World’s richest source of beta-carotene – 25 times higher than raw carrots. 300% more calcium than whole milk. 28 times richer in iron than raw beef liver
  • Available in powder or capsule form make it convenient and simple to use. Suitlable for vegan and vegeterian. Free from gluten, GMO, chemical
  • Vitamin and Supplements
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#4 Top Choice
VPA? Australia Spirulina - Natural Unflavoured, 100% Pure, 200g (40 Servings)

VPA? Australia Spirulina - Natural Unflavoured, 100% Pure, 200g (40 Servings)

Brand: VPA
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  • Supports Immune Health – Rich in antioxidants and anti-inflammatory compounds that help strengthen the body’s natural defences.
  • Natural Detox Support – Contains detoxifying properties that assist in removing toxins and promoting overall wellbeing.
  • Aids Digestion & Weight Management – Helps support healthy digestion, energy production, and weight loss efforts as part of a balanced lifestyle.
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#5 Popular Choice
Spirulina 500mg 300 Tablets

Spirulina 500mg 300 Tablets

Brand: PipingRock
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  • Superior quality nutrition at the best value
  • Designed to support your healthy lifestyle goals
  • Devoted to Purity, Potency and Safety!
  • Non-GMO and Gluten Free
  • Laboratory Tested, using Trusted Ingredients
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#6 Top Pick
Synergy Natural Organic Spirulina 200 Tablets 500mg

Synergy Natural Organic Spirulina 200 Tablets 500mg

Brand: Synergy Natural
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  • Natures richest source of protein than fish or meat
  • Rich in chlorophyll and 58 times more iron than spinach
  • A great source of antioxidants and contain beta-carotene
  • Rich and concentrated source of essential fatty acids
  • A food supplement maintaining health, energy and optimum weight
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#7 Top Pick
Swisse High Strength Organic Spirulina - Supports Energy Production & Wellbeing - 200 Tablets

Swisse High Strength Organic Spirulina - Supports Energy Production & Wellbeing - 200 Tablets

Brand: Swisse
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  • High strength organic spirulina tablets.
  • A natural source of vitamins, minerals, and antioxidants.
  • Contributes to energy metabolism and normal immune system function.
  • Good source of vitamin K which contributes to normal bone structure.
  • Suitable for vegans and vegetarians.
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#8 Top Pick
Honest to Goodness, Organic Blue Spirulina Powder, 70 grams - Strikingly vibrant, Naturally blue pigment, A Powerful Antioxidant thats Neutral in flavour.

Honest to Goodness, Organic Blue Spirulina Powder, 70 grams - Strikingly vibrant, Naturally blue pigment, A Powerful Antioxidant thats Neutral in flavour.

Brand: Honest to Goodness
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  • The term "phycocyanin" is derived from the Greek words phyco (algae) and cyanin (blue-green).
  • Not only just a striking vibrant blue colour, phycocyanin is the primary active compound in spirulina and is a powerful antioxidant.
  • Blue Spirulina derives its intense blue colour from the phycocyanin pigment, which is a blue pigment with antioxidant properties.
  • Blue Spirulina has a more neutral flavour than regular Spirulina (no fishy tastes!), which makes it a perfect healthy and natural alternative to artificial food colouring and additives.
  • From vibrant smoothie bowls and baked goods to refreshing beverages, blue spirulina opens up a world of creativity for culinary enthusiasts while also contributing to your overall wellbeing!
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#9 Top Pick
Pure Spirulina Powder | Immune Support and Antioxidants | No Filler & Non-GMO, Rich in Vegan Protein (100gm)

Pure Spirulina Powder | Immune Support and Antioxidants | No Filler & Non-GMO, Rich in Vegan Protein (100gm)

Brand: Raslok
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  • Immune Support: Spirulina is renowned for its immune-boosting properties. It provides your body with the vital nutrients it needs to fortify your natural defense system and protect against various health threats.
  • Antioxidant Powerhouse: This incredible blue-green algae is rich in antioxidants, fighting off free radicals and helping to reduce oxidative stress. It promotes radiant, youthful skin and supports overall cellular health.
  • Vegan Protein Source: Looking to enhance your protein intake on a plant-based diet? Raslok Pure Spirulina Powder is your go-to solution. It offers a complete source of vegan protein, containing all the essential amino acids your body requires.
  • Nutrient-Dense: Spirulina is a potent source of vitamins, minerals, and essential nutrients, such as iron, vitamin B12, and chlorophyll, which are vital for your energy levels and overall well-being.
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#10 Top Pick
Healthy Care Super Spirulina 1000mg Tablets, Light Green, 400 Count | Natural source of antioxidants, protein, iron and beta carotene

Healthy Care Super Spirulina 1000mg Tablets, Light Green, 400 Count | Natural source of antioxidants, protein, iron and beta carotene

Brand: VELOSVIE
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  • Essential nutrients : Healthy Care super spirulina tablets offer a high potency 1000 mg dose of Spirulina per tablet. This blue-green algae is celebrated as a superfood, packed with a significant array of nutrients known for their health benefits.
  • Health benefits: Spirulina is a powerhouse of vital nutrients. It naturally supports protein and iron levels in the body, enhances antioxidant protection, and boosts energy and vitality. Additionally, it assists with the body’s detoxification processes, promoting overall well-being.
  • Convenient tablet form: Designed for ease of use, these super spirulina tablets are a hassle-free way to incorporate the health benefits of spirulina into your daily routine. Each bottle contains 400 light green tablets, making it easy to maintain consistent supplementation.
  • Clean and pure composition: These spirulina supplements are free from added sugar, yeast, gluten, starch, wheat, corn, milk derivatives, preservatives, artificial flavours, or sweeteners, making them a suitable choice for individuals seeking a natural supplement without common allergens and additives.
  • Quality first: Australia is one of the few countries in the world that regulates health supplements with therapeutic regulations. Before anything leaves our warehouse it has to go through over 20 quality checks. All conforming to the TGA and cGMP standards.
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