Home / Ingredient Directory / Spirulina
Yannis Lopez
Reviewed by Yannis Lopez · Nutrition Industry Veteran
Last updated: July 6, 2026
Energy & Immune Blue-Green Algae

Spirulina

Nutrient-dense superfood

High in protein & antioxidants
Traditional superfood

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. Always consult your physician before starting any supplement.

Overview

Spirulina is a type of blue-green algae (cyanobacteria) that has been consumed for centuries as a nutrient-dense food source. It is particularly rich in protein (up to 70% by dry weight), B vitamins, iron, and powerful antioxidants like phycocyanin. Spirulina is considered one of the most nutrient-dense foods on the planet.

It has been used as a traditional food source by the Aztecs and is now widely available as a dietary supplement in powder or tablet form. Spirulina is valued for its potential to support energy, immune function, and overall nutrition, especially for those with plant-based diets.

Potential Benefits

Energy & Vitality

Rich in B vitamins, iron, and protein. Many users report improved energy levels and stamina when added to their daily routine.

Immune Support

Contains phycocyanin and other compounds that may support immune function and antioxidant defenses.

Antioxidant Protection

Extremely high in antioxidants, particularly phycocyanin, which may help neutralize free radicals and reduce oxidative stress.

Generally Well Tolerated

Spirulina is very safe for most people. Some may experience mild digestive upset when first starting. Choose reputable sources to avoid contamination.

Typical Dosage
Daily Dose
1–3g
Start with 1g and increase gradually
Best Taken
Mixed into smoothies, water, or juice
Can be taken any time of day
Pro Tips
  • Start with a small dose to assess tolerance
  • Mix thoroughly in liquids for better taste
  • Choose organic, third-party tested spirulina
  • Stack with Chlorella or Wheat Grass for enhanced nutrition
Research Snapshot

Spirulina has been studied for its antioxidant, immune-modulating, and nutritional properties. A 2018 meta-analysis of 12 trials found that spirulina supplementation significantly reduced total cholesterol, LDL cholesterol, triglycerides, fasting blood glucose, and diastolic blood pressure. It is considered a safe and nutrient-dense addition to the diet.

How Spirulina Compares

Ingredient Best For Key Difference
Spirulina Energy, Immune, Protein Blue-green algae; high protein & phycocyanin
Chlorella Detox, Nutrition, Immune Green algae; strong detox properties
Wheat Grass Antioxidants, Detox, Energy Young grass; high chlorophyll content

Spirulina is often stacked with Chlorella and Wheat Grass for comprehensive superfood nutrition.

Popular Stacks with Spirulina
Daily Greens Stack
Spirulina + Chlorella + Wheat Grass
Most popular daily superfood combination
Energy Stack
Spirulina + Maca + B-Complex
Great for daily vitality
Immune Stack
Spirulina + Zinc + Vitamin D3
Popular for immune support

Full stack recommendations coming soon in our Stacks section.

Frequently Asked Questions
How long until I feel benefits?
Many people notice improvements in energy within 1–2 weeks of consistent daily use. Immune and antioxidant benefits may take longer to notice subjectively.
Is spirulina safe for everyone?
Spirulina is generally safe for most people. Those with autoimmune conditions, phenylketonuria (PKU), or iodine allergies should consult a physician. Always choose reputable, tested sources to avoid contamination.
Powder or tablets — which is better?
Both are effective. Powder is more versatile for mixing into foods and drinks, while tablets are convenient for on-the-go use. Choose high-quality, tested products regardless of form.
Sources & References
  1. Huang HY, et al. Effects of Spirulina Supplementation on Lipid Profile, Blood Glucose, and Blood Pressure: A Meta-Analysis. Diabetes Metab Syndr Obes. 2018;11:729–742.
  2. Karkos PD, et al. Spirulina in Clinical Practice: Evidence-Based Human Applications. Evid Based Complement Alternat Med. 2011;2011:531053.
  3. Torres-Duran PV, et al. Antihyperlipemic and Antihypertensive Effects of Spirulina maxima in an Open Sample of Mexican Population. Lipids Health Dis. 2007;6:33.
Related Ingredients
Chlorella Zinc Vitamin D3 Maca
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