Source Naturals Spirulina, 500 mg, 100 Tablets supplement bottle
Source Naturals

Spirulina, 500 mg, 100 Tablets

What We Researched
14 active ingredients analyzed · 3 inactive ingredients decoded · 1 brand certification checked · 2 retailers compared · Last updated: Mar 2026
73
Product Score Fair
66
Brand Score Fair

Product Analysis

Transparency Excellent

Supplement Facts

IngredientAmount% DV
Total Carbohydrates 1 g <1%
Spirulina (Arthrospira platensis) Yielding Approximately: 3 g *
Vitamin A (as Beta Carotene) 6000 IU 120%
Vitamin K 16 mcg 20%
Vitamin B12 3 mcg 50%
Iron 1 mg 6%
Potassium 40 mg 1%
Phycocyanin 300 mcg *
Gamma Linolenic Acid 30 mg *
Chlorophyll 27 mg *
Carotenoid 11 mg *
Bioavailability Good

Absorption Rating

  • Total Carbohydrates Fair
  • Spirulina (Arthrospira platensis) Yielding Approximately: Good
  • Vitamin A (as Beta Carotene) Fair
  • Vitamin K Good
  • Vitamin B12 Fair
  • Iron Fair
  • Potassium Good
  • Phycocyanin Good
  • Gamma Linolenic Acid Fair
  • Chlorophyll Fair
  • Carotenoid Good
Other Ingredients Excellent

Fillers & Additives

  • Modified Cellulose Gum
  • Colloidal Silicon Dioxide
  • Stearic Acid
Efficacy Poor

Dosage Analysis

  • Spirulina (Arthrospira platensis) Yielding Approximately: 3 g Effective
  • Vitamin A (as Beta Carotene) 6000 IU Under-dosed
  • Vitamin K 16 mcg Under-dosed
  • Vitamin B12 3 mcg Effective
  • Iron 1 mg Under-dosed
  • Potassium 40 mg Under-dosed
  • Phycocyanin 300 mcg Under-dosed
  • Gamma Linolenic Acid 30 mg Under-dosed
  • Chlorophyll 27 mg Under-dosed

Supplement Facts

Ingredient Amount % Daily Value
Calories 10
Total Carbohydrates 1 g <1%
Sodium 20 mg 1%
Spirulina (Arthrospira platensis) Yielding Approximately: 3 g *
Protein 2 g 4%
Vitamin A (as Beta Carotene) 6000 IU 120%
Vitamin K 16 mcg 20%
Vitamin B12 3 mcg 50%
Iron 1 mg 6%
Potassium 40 mg 1%
Phycocyanin 300 mcg *
Gamma Linolenic Acid 30 mg *
Chlorophyll 27 mg *
Carotenoid 11 mg *

Other Ingredients

Inactive ingredients used in manufacturing. All rated for safety.

Modified Cellulose Gum Generally_safe

It is used to improve the texture and stability of products.

Colloidal Silicon Dioxide Generally_safe

It prevents clumping and improves powder flow.

Stearic Acid Safe

Helps ingredients flow smoothly through manufacturing equipment.

Price Comparison

Price History

Tracked across major retailers. Updated periodically.

$9$8$7$6$5 Mar 12 $6.99
Vitacost

Prices shown at time of last check. Click a retailer to see current price. GoodSupp is not affiliated with any retailer.

Brand Trust Report
Source Naturals

Founded 1982 · Scotts Valley, CA, USA · 837 products · sourcenaturals.com/

Certifications

1 certification
Fda Gmp Inspections Verified Source

Transparency

2 claims
Third Party Testing Claim — Claimed Source
In House Testing — Verified Source
Related Supplements
Frequently Asked Questions
Is Source Naturals Spirulina, 500 mg a good supplement?

Source Naturals Spirulina, 500 mg, 100 Tablets received a product quality score of 73/100 in GoodSupp's independent analysis, suggesting some areas that could be improved. The product contains 14 active ingredients with 16 servings per container. Of the 3 inactive ingredients, 1 are rated safe and 0 are flagged for review. The manufacturer, Source Naturals, holds a brand trust score of 66/100 with 1 verified certifications including Fda Gmp Inspections.

What are the ingredients in Source Naturals Spirulina, 500 mg?

Source Naturals Spirulina, 500 mg contains 14 active ingredients: Calories (10), Total Carbohydrates (1 g), Sodium (20 mg), Spirulina (Arthrospira platensis) Yielding Approximately: (3 g), Protein (2 g), Vitamin A (as Beta Carotene) (6000 IU), and 8 more. Each ingredient's dosage, form, and safety rating is analyzed independently in GoodSupp's full product breakdown.

Is Source Naturals Spirulina, 500 mg safe to take?

Source Naturals Spirulina, 500 mg, 100 Tablets has been analyzed for ingredient safety across all its components. Always consult your healthcare provider before starting any new supplement, especially if you take medications or have underlying health conditions.

Is Source Naturals a trustworthy supplement brand?

Source Naturals receives a brand trust score of 66/100 based on GoodSupp's independent analysis of certifications, regulatory history, and transparency practices. Founded in 1982 and headquartered in Scotts Valley, CA, USA, the company offers 837 products in their lineup. They hold 1 verified certifications including Fda Gmp Inspections. Third-party certifications are independently verified and indicate the brand meets specific quality, purity, and manufacturing standards. No regulatory violations or FDA warning letters were found in our research.

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Disclaimer: GoodSupp provides independent supplement quality analysis for informational purposes only. Scores are generated algorithmically based on ingredient profiles, brand certifications, and public records. This is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Product data is sourced from manufacturer labels and public databases. GoodSupp is not affiliated with any supplement brand.