tuneTypical Dose
Human studies commonly use low-gram daily dosing with product-specific tablets or powders
Supplement
Chlorella
Chlorella vulgaris
Evidence TierCWADA NOT PROHIBITED
watchEffect Window
Metabolic-marker changes usually take weeks.
check_circleCompliance
WADA NOT PROHIBITED
Overview
Clinical Summary
Chlorella may modestly improve some cardiometabolic markers, but its common detox positioning is much stronger than the direct human evidence.
Chlorella is often marketed for detoxification, heavy-metal clearance, and general cleansing. The stronger human evidence is narrower and more ordinary than that. Randomized trials and meta-analyses suggest modest improvements in some lipids, blood pressure, and metabolic markers. A newer 2025 exercise paper adds an exploratory aerobic-capacity signal, but it is still pilot scale and not enough to change the main use case. That supports a low- to moderate-confidence cardiometabolic-adjunct framing, not a sweeping detox claim.
Chlorella is a nutrient-dense algae supplement that may affect lipid metabolism and blood-pressure-related physiology, but the human evidence is more modest than its detox reputation.
Outcomes
What This Is Expected To Influence
Primary Outcomes
- Modest improvement in some lipids and blood pressure
Secondary Outcomes
- Limited supportive metabolic and liver-marker effects
Safety
Contraindications and Interactions
Contraindications
- Poor tolerance to algae-based products
Side effects
- GI upset
Interactions
No entries provided
Avoid if
- You cannot verify product quality or contamination testing
Evidence
Study-level References
chl-SRC-001Systematic review and meta-analysis
Sourceopen_in_newOghbaei M, et al. Effect of Chlorella supplementation on cardiovascular risk factors: A meta-analysis of randomized controlled trials. Crit Rev Food Sci Nutr. 2018;58(18):3091-3100. doi:10.1080/10408398.2017.1378993. PMID:29037431.
Population: Adults across randomized chlorella supplementation trials.
Dose protocol: Various chlorella supplementation protocols across randomized trials
Key findings: Modest improvements in total cholesterol, LDL cholesterol, blood pressure, and fasting glucose.
Notes: Best evidence anchor.
Paper content
This is the best current high-level anchor for chlorella. It supports modest cardiometabolic improvements in lipids and blood pressure, but not a broad detox narrative.
chl-SRC-002Randomized controlled trial
Sourceopen_in_newPanahi Y, et al. Investigation of the effects of Chlorella vulgaris supplementation in patients with non-alcoholic fatty liver disease: a randomized clinical trial. Scand J Gastroenterol. 2012;47(11):1449-1454. doi:10.3109/00365521.2012.748448. PMID:23234816.
Population: Adults with non-alcoholic fatty liver disease.
Dose protocol: 1.2 g daily Chlorella vulgaris for 8 weeks
Key findings: Improved several metabolic and liver-related markers in NAFLD.
Notes: Supportive secondary clinical trial.
Paper content
This trial supports a modest metabolic and liver-marker signal for chlorella, but it is not enough to justify broad detox or liver-cleansing claims.
chl-SRC-003Two randomized controlled trials (crossover and placebo-controlled) in humans, plus animal experiments.
Sourceopen_in_newFujie S, Inoue K, Tsuji K, Horii N, Oshiden M, Tabata I, Iemitsu M. Chlorella-Induced Increase in Cardiac Function Further Enhances Aerobic Capacity Through High-Intensity Intermittent Training in Healthy Young Men and Rats. Nutrients. 2025;17(16):2657. doi:10.3390/nu17162657. PMID:40871685.
Population: Healthy young men in two human studies (N=12 crossover and N=6 parallel).
Dose protocol: Chlorella supplementation for 3 to 4 weeks in healthy young men
Key findings: Improved VO2max when combined with HIIT (P<0.05). Increased stroke volume and cardiac output during maximal exercise with chlorella alone (P<0.05).
Notes: Small pilot-scale RCTs (N=12 and N=6). Novel exercise-performance angle for chlorella.
Paper content
This paper includes two small human RCTs plus animal experiments. In the first human study (N=12, crossover), 3 weeks of chlorella combined with HIIT produced significantly greater VO2max improvements than placebo plus HIIT (P<0.05). In the second study (N=6, parallel), 4 weeks of chlorella alone increased stroke volume and cardiac output during maximal exercise versus placebo (P<0.05 each). The authors propose chlorella improves aerobic capacity through enhanced cardiac function rather than peripheral adaptations. These are small pilot-scale studies and the findings require replication in larger samples.