Chlorella is a single-celled green freshwater algae marketed as a "superfood" with detoxification and immune-boosting claims. Our research shows it has genuine heavy metal binding capacity (in vitro and animal studies) and modest evidence for cholesterol reduction (LDL down 10% in a meta-analysis) and immune enhancement. The "detox" claim has SOME basis: chlorella's cell wall binds mercury, cadmium, and lead in the GI tract, potentially reducing absorption. However, the irony: chlorella itself can be contaminated with heavy metals depending on growing conditions. The broken cell wall form is essential — intact chlorella cells are essentially indigestible by humans (cellulose wall).
Chlorella works through: (1) cell wall binding — the fibrous cell wall (when broken) exposes binding sites for heavy metals in the GI tract, reducing intestinal absorption of mercury, cadmium, and lead (chelation in the gut, not systemic chelation); (2) chlorophyll (1-3% by weight) — antioxidant and potential anti-carcinogenic activity; (3) CGF (chlorella growth factor) — a nucleotide-peptide complex that stimulates growth factor production, enhancing cellular repair; (4) β-1,3-glucan in cell wall — activates macrophages and NK cells (same immune mechanism as mushroom beta-glucans); (5) complete nutrition — 50-60% protein, all essential amino acids, omega-3 DHA, B12 (though bioavailability debated), iron, and vitamin C.
Reviewed by the Scan Dose Research Team and Clinical Advisory Board | Last updated:
Not medical advice. Based on published clinical research and systematic reviews.