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Standardized Spirulina 500 mg

4.8
★ ★ ★ ★ ★
(1046 ratings)
Blue-Green Algae 500 mg
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Score80
A clearly labeled spirulina dose and inexpensive one-capsule serving make this easy to use. Limited source and purity information keeps it from being a more convincing algae choice.
How scoring works
Capsule
Quantity:90 Capsule(s) • (90 servings)
Goals:

Score 80

A clearly labeled spirulina dose and inexpensive one-capsule serving make this easy to use. Limited source and purity information keeps it from being a more convincing algae choice.
How scoring works
$8.69($0.09 per serving)
iHerb
$ 9.19
Amazon
$ 0.00
Walmart
$ 9.19
iHerb
$ 8.69
iHerb
$ 9.19
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Analysis

A 500 mg spirulina capsule offers a practical midrange amount with a simple daily routine. Vitamin A from beta-carotene and a small amount of vitamin K are disclosed, but spirulina remains the main reason to consider it.

The label states the active amount clearly and avoids hiding it in a blend. Species identity, phycocyanin content, organic status, and testing for microcystins or heavy metals are not supplied, leaving important source questions open.

The long serving count and low serving cost make ongoing use accessible. It suits buyers who value convenience and economy more than detailed sourcing and purity documentation.

Who is it for
  • Adults seeking an inexpensive spirulina capsule
  • People who prefer a one-capsule daily routine
  • Shoppers who value clear dosing over premium sourcing claims
Best for
  • Basic spirulina supplementation
  • Convenient daily use
  • Budget-conscious long-term use

Pros

  • Clearly stated 500 mg spirulina amount
  • One capsule provides a full serving
  • Strong value across 90 servings

Cons

  • Spirulina species is not identified
  • Phycocyanin content and organic status are not stated
  • No microcystin or heavy-metal testing evidence is provided

Warnings

  • The label does not provide microcystin or heavy-metal testing evidence, leaving blue-green algae purity uncertain.
  • The formula contains vitamin K, so people using warfarin or another vitamin-K antagonist should keep intake medically coordinated and consistent.
  • Avoid use if you have a known allergy or sensitivity to algae products.

Nutrient quality

75 High impact

The algae source is identified, but species detail and active-marker standardization are incomplete. The algae amount reaches a practical daily range.

Ingredient transparency

78 High impact

The algae amount is clearly disclosed. Excipients and daily directions are absent from the supplied data, which leaves some label details uncertain.

Customer satisfaction

71 High impact

The aggregate satisfaction average is strong, though no detailed feedback is supplied. The large volume provides a stable aggregate satisfaction signal.

Value for money

95 Highest impact

A useful algae amount supports good formula value despite purity uncertainty. The serving cost is low for the disclosed amount.

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Ingredients

IngredientAmount per serving
Vitamin A (Beta-Carotene, Spirulina)
 375 mcg RAE
Vitamin K (Spirulina)
 4 mcg
Spirulina
500 mg
Adults 18–50 Vegetarian
Report overview
Blue-Green Algae · 500 mg OverallScore55
F Active Ingredient Quality & BioavailabilityD Dose, Safety & Label TransparencyA+ Value

The 500 mg spirulina amount provides a useful mid-range serving with clear dose disclosure. The label gives no organic claim, species name, or phycocyanin standardization, so source quality remains uncertain. No testing statement for microcystins or heavy metals is provided despite the low serving cost.

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78 Performance

Organic Spirulina 2000 mg

Dr. Mercola
<p>A high organic spirulina amount is paired with a small amount of protein, beta-carotene, and iron. It covers the original main ingredient goal, although the supplied label still lacks some source-quality or active-marker details.</p>
57 Performance

Stress Support System

Pure Essence
<p>Organic spirulina is included with a large multi-botanical stress blend, but many active forms remain unspecified. It covers the original main ingredient goal, although the supplied label still lacks some source-quality or active-marker details.</p>
54 Performance

Source of Life Multi-Vitamin & Mineral No Iron

Natures Plus
<p>A meaningful spirulina amount sits inside a broad vitamin, mineral, botanical, and enzyme formula. It covers the original main ingredient goal, although the supplied label still lacks some source-quality or active-marker details.</p>
82 Budget

Organic Spirulina & Astaxanthin

Swanson
<p>The serving cost is not lower, but it is among the closest eligible choices. Certified-organic spirulina nearly doubles the original basic algae amount and adds a small declared astaxanthin dose. It covers the original main ingredient goal, although the supplied label still lacks some source-quality or active-marker details.</p>
78 Budget

Spirulina Micro-Algae 760 mg

Nature's Way
<p>The serving cost is not lower, but it is among the closest eligible choices. A larger spirulina amount is paired with a small amount of protein and beta-carotene in a simple formula. It covers the original main ingredient goal, although the supplied label still lacks some source-quality or active-marker details.</p>
77 Budget

Klamath Shores Blue Green Algae

American Health
<p>The serving cost is not lower, but it is among the closest eligible choices. A simple Klamath Lake blue-green algae serving matches the basic algae amount with no additional active ingredients. Compared with the original, it omits spirulina, so it is not a complete like-for-like replacement.</p>
62 Value

Alkaline Balance

Source Naturals
<p>A small spirulina amount is part of a broad mineral, vegetable, fiber, and botanical formula rather than a focused algae product. The value rests on ingredient breadth or definition rather than a lower serving cost. It covers the original main ingredient goal, although the supplied label still lacks some source-quality or active-marker details.</p>
59 Value

Stem Boost-R

LifeSeasons
<p>Spirulina is paired with vitamin D, blueberry, seaweed, royal jelly, green-tea actives, and carnosine in a broad blend. The value rests on ingredient breadth or definition rather than a lower serving cost. It covers the original main ingredient goal, although the supplied label still lacks some source-quality or active-marker details.</p>
63 Value

EnergyPlus

Pure Essence
<p>A meaningful organic spirulina amount is combined with many adaptogens and mushrooms, with every amount listed. The value rests on ingredient breadth or definition rather than a lower serving cost. It covers the original main ingredient goal, although the supplied label still lacks some source-quality or active-marker details.</p>
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