Chlorella
Chlorella vulgaris
A freshwater green algae with a unique cell wall that binds to heavy metals, used in detoxification protocols, immune support, and as a nutrient-dense whole food supplement.
What is Chlorella?
Chlorella is a single-celled freshwater green algae (Chlorophyta) notable for its tough fibrous cell wall that has a unique capacity to bind heavy metals and environmental toxins. Chlorella Growth Factor (CGF), found in its nucleus, contains nucleic acids, peptides, and polysaccharides that support cellular repair.
Known Health Benefits
How It Works
Chlorella's primary detoxification mechanism involves its unique triple-layered cell wall, which contains sporopollenin — a biopolymer with high affinity for binding divalent metal cations including mercury, lead, cadmium, and arsenic through ion exchange and chelation. This binding occurs in the GI tract, preventing enterohepatic recirculation of heavy metals excreted in bile. Chlorella Growth Factor (CGF) contains nucleotides, RNA, and DNA fragments that may support cellular repair and immune function. The high chlorophyll content (2–3% dry weight) supports hemoglobin synthesis, wound healing, and has demonstrated antimutagenic properties by binding to carcinogens. Beta-glucans in chlorella's cell wall stimulate macrophage activation, enhance NK cell cytotoxicity, and promote dendritic cell maturation. Chlorella's nutrient density provides complete protein (50–60%), bioavailable iron, B-vitamins, lutein, and alpha-linolenic acid. Unlike spirulina, chlorella's B12 content includes bioactive forms, though amounts may be insufficient as a sole B12 source.
What Research Says
Nakano et al. (Alternative Therapies in Health and Medicine, 2005) demonstrated chlorella supplementation significantly reduced dioxin levels in breast milk of Japanese women — a landmark finding for environmental toxin reduction. Merchant et al. (Alternative Therapies, 2001) found chlorella at 5 g/day for 2 months significantly increased NK cell activity and Th1-type cytokine production. Otsuki et al. (Plant Foods for Human Nutrition, 2019) showed chlorella at 6 g/day reduced total cholesterol, triglycerides, and fasting glucose in hyperlipidemic adults. Ryu et al. (Nutrition Research and Practice, 2014) found chlorella supplementation reduced BMI, total cholesterol, and fasting glucose in non-alcoholic fatty liver disease patients. Uchikawa et al. (Environmental Sciences, 2010) demonstrated chlorella's ability to enhance mercury excretion in animal models.
Active Compounds
Chlorophyll, Chlorella Growth Factor (CGF), complete amino acids, beta-glucans
Forms & Bioavailability
Chlorella's tough triple-layered cell wall must be mechanically broken (broken cell wall process) for nutrients to be digestible. Unprocessed chlorella passes through the GI tract largely intact. Broken cell wall chlorella achieves 80%+ digestibility. The cell wall binding capacity is retained even after processing.
Dosage Guidance
| Use Case | Dosage |
|---|---|
| General nutrition and maintenance | 3–5 g/day |
| Detoxification support | 5–10 g/day |
| Immune support | 5 g/day |
| Cholesterol and metabolic support | 6 g/day |
Always consult a healthcare provider for personalized dosing.
Natural Food Sources
- Chlorella is the food itself; consumed as powder, tablets, or liquid extract
Potential Side Effects
Nausea, gas, green stools; detox reactions initially; start slowly
Who Should Avoid It
- Warfarin or vitamin K-sensitive medication (chlorella is high in vitamin K)
- Autoimmune conditions (immune stimulation may worsen)
- Known algae or mold allergy
- Iron overload disorders (chlorella is iron-rich)
Pregnancy & Lactation
Chlorella has been studied for reducing dioxin transfer via breast milk, with positive results. However, detoxification during pregnancy raises concerns about mobilizing stored toxins. Starting chlorella before pregnancy (pre-conception) may be safer than initiating during pregnancy. Consult healthcare provider.
Known Drug Interactions
May reduce warfarin effectiveness (high vitamin K); may bind minerals if taken with supplements
Evidence Classification
Supported by cohort studies, case-control studies, or multiple observational studies with consistent findings.
Frequently Asked Questions
What is broken cell wall chlorella?
Chlorella has one of the toughest cell walls in nature. Without mechanical processing to crack this wall, the nutrients inside are largely inaccessible. 'Broken cell wall' chlorella has been processed (usually by pressure or milling) to achieve 80%+ digestibility while retaining the cell wall's metal-binding properties.
Can chlorella remove heavy metals from the body?
Chlorella's cell wall binds to heavy metals in the GI tract, preventing reabsorption of metals excreted in bile. This interrupts enterohepatic recirculation. While not equivalent to clinical chelation therapy (DMSA, EDTA), chlorella is a useful adjunct in integrative detoxification protocols.
Why do I feel worse when starting chlorella?
This 'detox reaction' (Herxheimer-like response) may occur as chlorella mobilizes and binds toxins, temporarily increasing circulating levels before excretion. Start with 1 g/day and increase slowly over 2 weeks. Adequate hydration and fiber support elimination.
How is chlorella different from spirulina?
Chlorella is a true green algae with a cell wall that binds toxins — optimal for detoxification. Spirulina is a cyanobacterium without a cell wall — optimal for protein and nutrient density. Chlorella has more chlorophyll; spirulina has more phycocyanin. Many protocols use both.
Is chlorella safe long-term?
Yes, when sourced from reputable manufacturers with third-party testing for contaminants. Chlorella has been consumed as a food supplement for decades. The main long-term consideration is vitamin K content for those on anticoagulant therapy and potential iron accumulation.
References
- Chlorella supplementation decreases dioxin and increases immunoglobulin A levels in breast milk. Nakano S, Takekoshi H, Nakano M. Journal of Medicinal Food (2007)View study
- Chlorella pyrenoidosa supplementation reduces the risk of anemia, proteinuria and edema in pregnant women. Nakano S, Takekoshi H, Nakano M. Plant Foods for Human Nutrition (2010)
- A randomized controlled trial of the immune-modulating effects of chlorella. Merchant RE, Andre CR. Alternative Therapies in Health and Medicine (2001)
Related Health Conditions
Related Supplements
Have questions about Chlorella?
Ask Mother Nature AI about dosing, interactions with your medications, whether it fits your health goals, and more — personalized to your health profile.
This entry is for educational purposes only. It is not medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement regimen, especially if you take medications or have health conditions.