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Chlorella (Chlorella vulgaris)
Freshwater algae with the highest chlorophyll content of any plant — binds heavy metals and supports detoxification pathways.
What the evidence says
Chlorella doesn't have enough studies with structured effect-size data yet to pool a verdict. Browse the studies below for individual findings.
Most evidence is from high-quality meta-analyses and randomised trials published 2001–2026 with a typical study size of 37 participants.
Based on 53 studies · 5 meta-analyses · 31 RCTs · 2,921 total participants
Confidence
High confidenceBy outcome
Several meta-analyses and numerous RCTs show consistent but modest improvements in cholesterol and cardiovascular risk factors, yet effects are small, some trials are null, and the popular 'detox' claims rest on thin biomarker evidence.
24 randomised trials
83% were about Chlorella in an audit of 24 of them
Every randomised or controlled trial of Chlorella indexed in PubMed, not a hand-picked subset. Meta-analyses and systematic reviews are deliberately excluded from this count: most of them cover many compounds at once, so counting them would inflate it.
PubMed · as of Sep 2026
3 trials ongoing or recruiting · 10 completed on ClinicalTrials.gov
Registered trials show research momentum for Chlorella, not proof of effect — a registration is a plan, and posted results are sponsor-reported, not peer-reviewed. They are never counted toward the evidence rating above.
Browse these trials on ClinicalTrials.govClinicalTrials.gov · as of Oct 2026
Chlorella is a single-celled green freshwater algae that has gained popularity for its detoxification properties and nutritional density. It contains chlorophyll (the highest of any known plant), protein, vitamins, minerals, and a unique compound called Chlorella Growth Factor (CGF).
It's particularly noted for its ability to bind heavy metals and support their elimination from the body, making it popular for detox protocols.
Binds to heavy metals for elimination
Highest chlorophyll content of any plant
Unique nucleotide-peptide complex
How Chlorella works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
May help support elimination; work with practitioner
High vitamin K may reduce effectiveness
May stimulate immune function A grade for this interaction is held for clinical review and has not been validated, so no severity is given. The precaution still applies: ask a pharmacist about the exact supplement and medicine. Do not stop or change prescribed medicines based on this notice.
Tip: Start low; take with food
Tip: Normal effect from high chlorophyll
Tip: Start with very low dose; increase gradually
Chlorella has an evidence score of 6.5/10 — moderate evidence based on 53 indexed studies, including 3 meta-analyses. Freshwater algae with the highest chlorophyll content of any plant — binds heavy metals and supports detoxification pathways. Representative study: PMID 35331862.
The commonly studied dose of Chlorella is 3-10g daily. Individual needs vary — start at the lower end of the range and adjust based on how you respond.
The best time to take Chlorella is in the morning. Taking it with food is preferred. Chlorella (Chlorella vulgaris/pyrenoidosa) is a nutrient-dense green algae rich in chlorophyll, protein, iron, B12, and chlorella growth factor (CGF).
Chlorella is generally well-tolerated and considered safe for most healthy adults at recommended doses. The most commonly reported side effects are green stool, nausea, detox symptoms. Use caution if any of these apply to you: Warfarin use (high vitamin K); Severe iodine sensitivity.
CoQ10
Likely helpsA lipid-soluble antioxidant central to mitochondrial energy production, with the strongest trial support for fertility/IVF outcomes and heart failure.
Andrographis
Likely helpsStudied for comfort and symptom duration during upper-respiratory infections when taken at onset — also supports liver health.
Spirulina
Likely helpsBlue-green algae with 60-70% complete protein and unique phycocyanin antioxidant — lowers cholesterol, blood pressure, and blood sugar.
Glucomannan
Likely helpsAbsorbs up to 50x its weight in water, creating strong satiety — supports weight loss, blood sugar regulation, and cholesterol reduction.
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Reviewed by Dr. Baher Al Hakim · Last reviewed May 2026 · evidence from 53 studies · how we score · editorial policy
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
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