Spirulina
Arthrospira platensis / A. maxima
螺旋藻
Pinyin: Luó Xuán Zǎo
Plant Family
Cyanobacteria (not a true plant - blue-green algae)
Part Used
Whole biomass
Origin
Originally from alkaline lakes in Africa, Mexico, and South America; now cultivated worldwide in controlled ponds
Safety Level
Safe
Overview
Spirulina is a type of blue-green algae that grows naturally in alkaline lakes and is widely cultivated as a superfood. It has been consumed for centuries in some cultures (Aztecs in Mexico, Kanembu people in Chad). Spirulina is one of the most nutrient-dense foods known, packed with protein, vitamins, minerals, and antioxidants.
Traditional Chinese Medicine Properties
Nature (四气)
cool
Flavors (五味)
sweet, salty
Meridians (归经)
spleen, stomach, liver
Health Benefits
Traditional Uses
- Highly nutritious food source
- Energy and vitality booster
- Support during convalescence
- Protein source for vegetarians/vegans
- Weight management support
- Detoxification support
Active Constituents
The key compounds responsible for this herb's therapeutic effects:
Usage & Dosage
How to Use
Powder, tablets, capsules, added to smoothies and juices.
Suggested Dosage
1–3 g daily (maintenance); up to 10 g daily (therapeutic). Start with a small dose (500 mg–1 g) and gradually increase to allow the body to adapt. Take with food to reduce digestive upset.
Quality & Storage
Harvest Season
Year-round in controlled cultivation ponds. Harvested by filtering and then drying (spray-dried or freeze-dried). Quality and purity depend heavily on cultivation conditions.
Quality Indicators
Look for products with third-party testing for contaminants (heavy metals, microcystins, bacteria). High-quality spirulina has a deep blue-green color and mild seaweed-like smell. Certified organic and non-GMO are preferred. Contamination risk with low-quality products is significant - buy from reputable brands.
Storage
Powder and tablets: airtight container in cool dark place, 1–2 years. Refrigeration can extend shelf life. Protect from light, heat, and moisture which degrade nutrients.
Safety Information
Contraindications
Phenylketonuria (PKU) - spirulina contains phenylalanineAutoimmune diseases (may stimulate immune system - use cautiously)Severe kidney or liver disease (high protein content - consult practitioner)Pregnancy and breastfeeding (insufficient safety data - avoid)Children (insufficient long-term data)Those on blood thinners (high vitamin K content)
Possible Side Effects
- Generally well-tolerated at recommended doses
- Mild digestive upset (nausea, bloating, diarrhea) - especially when starting
- Headache and dizziness (detox-like reaction - usually temporary)
- Green-colored stool (chlorophyll - normal and harmless)
- Allergic reaction (rare but possible)
- Potential for contamination with microcystins or heavy metals if not from a reputable source (buy third-party tested!)
- May worsen autoimmune symptoms in some people
Drug Interactions
- Blood thinners (high vitamin K content may reduce effectiveness of warfarin - monitor INR)
- Immunosuppressant drugs (may counteract effect)
- Diabetes medications (may lower blood sugar - monitor)
- Blood pressure medications (may lower blood pressure)
- Generally moderate interaction potential
Note: Always consult with a qualified healthcare practitioner before starting any herbal supplement, especially if you are pregnant, nursing, have medical conditions, or take medications.
References & Research
Information on this page is based on traditional herbal knowledge and modern scientific research. For a comprehensive list of references, please refer to our full citations page.
ℹ️ Disclaimer
This information is for educational purposes only and is not intended to diagnose, treat, cure, or prevent any disease. The FDA has not evaluated these statements. Always consult a qualified healthcare provider before using herbal supplements.
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