What does Chlorella do?

Green microalgae with some evidence for modest exercise performance and muscle protein support.

Most 'detox' and heavy metal cleansing claims are not supported by human clinical trials in the provided evidence

← All Ingredients Superfood

Chlorella

Also known as: Chlorella vulgaris, Chlorella pyrenoidosa, green algae, microalgae

Effective Dosage

6 g/day (exercise performance studies); 30 g protein equivalent (muscle protein synthesis studies)

What the Science Says

Chlorella is a single-celled green algae sold as a powder or tablet supplement. Clinical trials suggest it may modestly improve aerobic capacity (VO2max) and reduce blood lactate during exercise, particularly when combined with training over 2–21 days at 6 g/day. It also contains protein and essential amino acids that can stimulate muscle protein synthesis at rates comparable to other plant-based proteins like mycoprotein, though its amino acid absorption is slower than spirulina.

What It Doesn't Do

Not proven to detox heavy metals in humans — the detox claims come from lab and animal studies, not human trials. Won't replace a balanced diet. No strong evidence it boosts immunity, improves skin, or cures any disease. Performance benefits are modest and inconsistent across studies — don't expect dramatic gains.

Evidence-Based Benefits

Nutritious algae. May have some nutritional benefits. Limited evidence for claims.

Weak Evidence

Effective at: 2-3g daily (for nutritional use)

Source: Examine.com

Absorption & Bioavailability

Moderate — chlorella raises plasma amino acids after ingestion, but more slowly and to lower peak levels than spirulina or animal proteins. Cell wall may limit nutrient absorption; broken-cell-wall forms are often marketed as more bioavailable, but this wasn't directly tested in the provided studies.

Red Flags to Watch For

Most 'detox' and heavy metal cleansing claims are not supported by human clinical trials in the provided evidence
Several irrelevant papers in this dataset used chlorella as a lab organism for environmental toxicology — not human health research
Exercise performance benefits were small and not consistent across all studies; one cycling study showed no significant improvement in time trial performance
Animal and fish studies (catfish, rats) cannot be directly extrapolated to human health benefits
Quality varies widely between products — contamination with heavy metals or harmful algae is a real risk with poorly sourced algae supplements

Supplement

5/10 Overhyped

View all product reviews →

Research Sources

PubMed
NIH DSLD

This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-04-06