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Cheapest Spirulina on iHerb

Ranked by real cost per 100 mg of Spirulina — cheapest value first.

Prices updated Jul 25, 2026 · 25 products · Prices in USD

The priciest option here costs about 10.3× more per 100 mg of Spirulina than the best-value pick NaturesPlus. For the same daily dose, choosing by cost per unit instead of sticker price can meaningfully cut your yearly spend.
#ProductDoseServingsPrice (USD)Cost per 100 mg
1
NaturesPlus, Source of Life®, Green and Red Mini-Tabs, 180 Tablets
NaturesPlus, Source of Life®, Green and Red Mini-Tabs, 180 Tablets
NaturesPlus
500 mg302.000.013View on iHerb →
2
HealthForce Superfoods, Spirulina Manna™, 5.25 oz (149 g)
HealthForce Superfoods, Spirulina Manna™, 5.25 oz (149 g)
HealthForce Superfoods
2,700 mg5529.950.020View on iHerb →
3
NaturesPlus, Source of Life®, Original Tablets, Multivitamin & Mineral Supplement, 30 Tablets
NaturesPlus, Source of Life®, Original Tablets, Multivitamin & Mineral Supplement, 30 Tablets
NaturesPlus
1,000 mg6014.830.025View on iHerb →
4
HealthForce Superfoods, Spirulina Manna™, 450 VeganCaps™
HealthForce Superfoods, Spirulina Manna™, 450 VeganCaps™
HealthForce Superfoods
2,100 mg9049.950.026View on iHerb →
5
Dr. Mercola, Organic Spirulina, 120 Tablets
Dr. Mercola, Organic Spirulina, 120 Tablets
Dr. Mercola
2,000 mg3021.990.037View on iHerb →
6
HealthForce Superfoods, Spirulina Manna™, 150 VeganCaps™
HealthForce Superfoods, Spirulina Manna™, 150 VeganCaps™
HealthForce Superfoods
2,500 mg3029.950.040View on iHerb →
7
NutriBiotic, Immunity, Meta-C® , 250 Vegan Tablets
NutriBiotic, Immunity, Meta-C® , 250 Vegan Tablets
NutriBiotic
310 mg25031.790.041View on iHerb →
8
NutriBiotic, Immunity, Meta-C® Powder, 8 oz (227 g)
NutriBiotic, Immunity, Meta-C® Powder, 8 oz (227 g)
NutriBiotic
470 mg9017.990.043View on iHerb →
9
Swanson, Whole Food Multi Without Iron, 90 Tablets
Swanson, Whole Food Multi Without Iron, 90 Tablets
Swanson
1,000 mg3014.840.050View on iHerb →
10
ALLMAX, CytoGreens®, Premium Green Superfood For Athletes, Orange Vanilla, 11.11 oz (315 g)
ALLMAX, CytoGreens®, Premium Green Superfood For Athletes, Orange Vanilla, 11.11 oz (315 g)
ALLMAX
1,665 mg3026.630.053View on iHerb →
11
NutriBiotic, Immunity, Meta-C®, 100 Vegan Tablets
NutriBiotic, Immunity, Meta-C®, 100 Vegan Tablets
NutriBiotic
310 mg10017.240.056View on iHerb →
12
ALLMAX, CytoGreens®, Premium Green Superfood For Athletes, Acai Berry Green Tea, 1.2 lbs (535 g)
ALLMAX, CytoGreens®, Premium Green Superfood For Athletes, Acai Berry Green Tea, 1.2 lbs (535 g)
ALLMAX
1,665 mg6057.350.057View on iHerb →
13
ALLMAX, CytoGreens®, Premium Green Superfood for Athletes, Chocolate, 1.5 lbs (690 g)
ALLMAX, CytoGreens®, Premium Green Superfood for Athletes, Chocolate, 1.5 lbs (690 g)
ALLMAX
1,665 mg6057.350.057View on iHerb →
14
ALLMAX, CytoGreens®, Premium Green Superfood For Athletes, Acai Berry Green Tea, 9.4 oz (267 g)
ALLMAX, CytoGreens®, Premium Green Superfood For Athletes, Acai Berry Green Tea, 9.4 oz (267 g)
ALLMAX
1,665 mg3033.290.067View on iHerb →
15
ALLMAX, CytoGreens®, Premium Green Superfood For Athletes, Chocolate, 2.2 oz (345 g)
ALLMAX, CytoGreens®, Premium Green Superfood For Athletes, Chocolate, 2.2 oz (345 g)
ALLMAX
1,665 mg3033.290.067View on iHerb →
16
ALLMAX, CytoGreens®, Premium Green Superfood For Athletes, Acai Berry Green Tea, 4.4 oz (125 g)
ALLMAX, CytoGreens®, Premium Green Superfood For Athletes, Acai Berry Green Tea, 4.4 oz (125 g)
ALLMAX
1,665 mg1416.640.071View on iHerb →
17
NutriBiotic, Immunity, Meta-C®, 250 Capsules
NutriBiotic, Immunity, Meta-C®, 250 Capsules
NutriBiotic
155 mg25029.240.076View on iHerb →
18
NutriBiotic, Immunity, Meta-C®, 100 Gluten Free Capsules
NutriBiotic, Immunity, Meta-C®, 100 Gluten Free Capsules
NutriBiotic
155 mg10012.370.080View on iHerb →
19
Swanson, Green Max, 180 Veggie Capsules
Swanson, Green Max, 180 Veggie Capsules
Swanson
678 mg3019.130.094View on iHerb →
20
Swanson, Fruit & Vegetable Powder, 8.11 oz (230 g)
Swanson, Fruit & Vegetable Powder, 8.11 oz (230 g)
Swanson
540 mg2513.400.099View on iHerb →
21
NaturesPlus, Source of Life®, Original Tablets, Multivitamin & Mineral Supplement, 180 Tablets
NaturesPlus, Source of Life®, Original Tablets, Multivitamin & Mineral Supplement, 180 Tablets
NaturesPlus
1,000 mg6072.210.120View on iHerb →
22
NaturesPlus, Source of Life, Original Mini-Tabs, Multivitamin & Mineral Supplement, 360 Tablets
NaturesPlus, Source of Life, Original Mini-Tabs, Multivitamin & Mineral Supplement, 360 Tablets
NaturesPlus
1,000 mg6073.910.123View on iHerb →
23
NaturesPlus, Source of Life Original, Multi-Vitamin & Mineral Supplement, 90 Tablets
NaturesPlus, Source of Life Original, Multi-Vitamin & Mineral Supplement, 90 Tablets
NaturesPlus
1,000 mg3040.330.134View on iHerb →
24
NaturesPlus, Source of Life, Original Mini-Tabs, Multivitamin & Mineral Supplement with Concentrated Whole Foods, Iron-Free, 180 Tablets
NaturesPlus, Source of Life, Original Mini-Tabs, Multivitamin & Mineral Supplement with Concentrated Whole Foods, Iron-Free, 180 Tablets
NaturesPlus
1,000 mg3040.760.136View on iHerb →
25
NaturesPlus, Source of Life®, Original Mini-Tabs, Multivitamin & Mineral Supplement with Concentrated Whole Foods, 180 Tablets
NaturesPlus, Source of Life®, Original Mini-Tabs, Multivitamin & Mineral Supplement with Concentrated Whole Foods, 180 Tablets
NaturesPlus
1,000 mg3041.180.137View on iHerb →

How we rank Spirulina

Two supplements can list the same dose per serving yet cost very differently once you account for how many servings are in the bottle. We calculate the total nutrient in each container (dose per serving × servings per container), divide the current price by that total, and rank by the resulting cost per unit. Lower is better. Because prices are refreshed automatically, this ranking reflects today's iHerb pricing rather than a snapshot from months ago.

Cost per unit is a starting point, not the whole story — the ideal form, third-party testing, and other ingredients matter too. Always check the label and consult a healthcare professional before starting a supplement.

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Prices update automatically and may differ from iHerb at checkout. Rankings are based on cost per unit of the listed nutrient and are for informational purposes only — not medical advice. Links to iHerb are affiliate links.