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Head-to-head evidence comparison — which supplement is right for you?
Chlorella vs Pelargonium Sidoides: Chlorella has the stronger overall evidence (6.5 vs 6.5/10); they're alternatives for support immune system — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Chlorella wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Too few graded studies
Top outcomes
Verdict
Too few graded studies
Top outcomes
3-10g daily
Before meals for detox, With food if GI sensitive, Away from medications (may bind)
Broken cell wall chlorella powder or tablets
Liquid EPs 7630: 30 drops three times daily for adults during an acute infection (the cited trials used this dose in 12 to 18 year olds, and gave adults 30, 60 or 90 mg of EPs 7630 a day as tablets)
Spread through the day
Liquid extract (EPs 7630)
4-8 weeks
4-8 weeks
8-12 weeks
First 1-2 weeks
Days 4-7 of an acute episode
Within the acute illness window
During use
Identifying immunostimulatory herbal supplements that may flare autoimmune skin diseases: a systematic scoping review
Lupus science & medicine (2025) · Review
Scoping review screening 11,819 articles, of which 469 studies met inclusion criteria, identified 227 herbal supplements with immunostimulatory properties.
Effect of supplementation with Chlorella vulgaris on lipid profile in adults: A systematic review and dose-response meta-analysis of randomized controlled trials
Complementary therapies in medicine (2022) · Meta analysis · n=539
Meta-analysis of 10 RCTs with 539 adults (264 given Chlorella vulgaris, 275 controls).
Dietary Interventions in the Management of Fibromyalgia: A Systematic Review and Best-Evidence Synthesis
Nutrients (2020) · Systematic review
It is estimated to have a worldwide prevalence of 1.78%, with a predominance in females.
Pelargonium sidoides extract for treating acute respiratory tract infections.
Cochrane Database Syst Rev (2013) · Systematic review · n=10 trials; ~746 adults and ~819 children
Liquid EPs 7630 showed effectiveness for acute bronchitis in both adults and children; tablets did not
Treatment of acute bronchitis with EPs 7630: randomized, controlled trial in children and adolescents.
Pediatr Int (2012) · Rct · n=220 children/adolescents
Significantly greater BSS reduction with EPs 7630 versus placebo (P<0.0001)
Efficacy and tolerability of EPs 7630 tablets in patients with acute bronchitis: a randomised, double-blind, placebo-controlled dose-finding study with a herbal drug preparation from Pelargonium sidoides.
Wien Med Wochenschr (2010) · Rct · n=406 adults
All three active dose groups improved patient-reported outcomes versus placebo at day 7
At 1.5 g a day for 8 weeks, a double-blind trial in 84 adults with type 2 diabetes found no change in blood lipids (PMID 33532874). At 5 g a day for 4 weeks, two double-blind trials found an effect: in 63 mildly hypercholesterolaemic adults total cholesterol changed -1.6% versus 0.03% on placebo (PMID 24920270), and in 34 adults eating three eggs a day LDL-C rose 1.7% versus 14.3% on placebo (PMID 27177615). At 15 g a day for 14 days, total and LDL cholesterol fell in 80 healthy adults (PMID 37049486), but uric acid rose and iron and selenium status fell. The meta-analyses disagree on dose: one found reductions at doses above 4 g a day (PMID 29037431), another found the LDL-C reduction at doses up to 1,500 mg and not above (PMID 35331862). No trial compared doses, so the curve is flat above 5 g and no minimum, optimal or safe ceiling is set.
AI-estimated from published studies. Interpret as directional guidance.
Chlorella has a higher evidence score (6.5/10 vs 6.5/10) and wins in 2 of 3 categories.
For support immune system, Pelargonium Sidoides has a higher relevance score (62 vs 60).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.