Is spirulina or chlorella better for heavy metals?

Chlorella, on the subratings, at 5.5 against spirulina's 3.0. The evidence is narrower than the claim. Nakano 2007 gave 6 g a day to 35 pregnant women and lowered dioxin toxic equivalents in breast milk, and dioxins are fat-soluble organic pollutants rather than metals. No trial on either report shows chlorella clearing lead, cadmium, mercury or arsenic from a person. Suspected metal exposure needs testing and a clinician, not a green powder.

Which algae should I take if I only take one?

Spirulina, for most people. It scores 7.0 against chlorella's 6.5 and leads cardiovascular 7.5 against 6.5, blood sugar 7.0 against 5.0, inflammation 6.0 against 4.0 and respiratory 6.5 against 2.0. It also works at 1 to 4.5 g a day for its main endpoints, against 5 to 10 g for chlorella's cardiovascular protocol.

Can I take spirulina and chlorella together?

Yes, and it makes more sense than most supplement stacking, because the mechanisms barely overlap. Spirulina works through phycocyanin and GLA signaling, while chlorella works through fiber, sterols and gut binding. They meet only at LDL. The catch is that you double a contamination exposure you control only through certificates of analysis.

Are spirulina and chlorella contaminated with heavy metals?

They can be, and that is the main risk with both. Uncertified open-pond spirulina can carry microcystin toxins or heavy metals, and poorly sourced chlorella can bioaccumulate lead, cadmium and arsenic from its growing water. Buy from a producer that publishes a current certificate of analysis: microcystins under 1 ppm for spirulina, and a full heavy-metal panel for chlorella. That certificate is worth more than any price difference between brands.

How long until either one does anything?

Give both 12 weeks. Chlorella gives a first noticeable change around 4 weeks and spirulina around 6, but the assessment window on both reports is 12 weeks and full effect lands at 12 weeks. Book the lipid panel, the fasting glucose or the liver enzymes before you start, then repeat at three months.

Which one is cheaper?

Spirulina, usually, at an extracted $10 to $25 a month for third-party tested powder or tablets at 3 to 5 g a day. Chlorella is an estimated $10 to $50, because quality cracked-cell-wall product runs $10 to $25 at 5 g a day and the cardiovascular protocol doubles that. Per gram they cost about the same, and dose is what separates them.

Who should avoid spirulina?

Anyone with phenylketonuria, because spirulina contains phenylalanine. Use caution with active autoimmune disease, where immune stimulation could theoretically trigger a flare, and with known algae or seafood protein hypersensitivity. Pregnancy, lactation and giving it to children all need clinician guidance, and uncertified open-pond product is out for everyone.

Who should avoid chlorella?

Anyone on warfarin or another vitamin K sensitive anticoagulant. Also iodine-sensitive thyroid disease, known algae allergy and photosensitivity disorders, since rare photosensitivity has been reported in sensitive people. Pregnancy and breastfeeding need clinician guidance, and untested low-cost powder carries the heavy-metal risk that makes the whole category worth checking.

Does either algae help with allergies?

Spirulina does, on its report's own scoring, with a respiratory subrating of 6.5 against chlorella's 2.0. Allergic rhinitis is treated there as a distinct use case with trial evidence behind it and symptom relief within several weeks of daily use. Chlorella scores 2.0, which is the bottom of the range and means no case at all.

Head-to-Head Comparison

Spirulina vs Chlorella: Which Is Better for Detox?

Should I take spirulina or chlorella?

Reviewed 09/07/2026

Spirulina scores 7.0 and chlorella 6.5, so spirulina is the better default for most people. It leads on blood pressure, blood sugar, inflammation and breathing. Chlorella leads on liver enzymes and on binding fat-soluble toxins in the gut. Both are cheap, and sourcing decides whether either one is safe.

Spirulina 7.0 and strong recommend, chlorella 6.5 and worth trying. Spirulina is the default if you are only buying one.
Spirulina takes cardiovascular 7.5 against 6.5, blood sugar 7.0 against 5.0, and respiratory 6.5 against 2.0.
Chlorella takes heavy-metal detox 5.5 against 3.0 and liver 6.0 against 5.5, and Fallah 2018 pooled 19 trials for its lipid and blood-pressure case.
The heavy-metal claim needs a footnote. The human trial behind it, Nakano 2007, measured dioxins in breast milk, not lead or mercury.
Contamination is the actual risk on both. Spirulina needs a microcystin certificate, chlorella needs a heavy-metal certificate. Uncertified product is the hazard, not the algae.
Spirulina runs $10 to $25 a month. Chlorella is an estimated $10 to $50, because the studied dose is heavier.

At a Glance

Option B

Chlorella

6.5 / 10 Worth trying

Upside

Efficacy 3.0
Breadth 3.5
Evidence 2.9
Speed 2.6
Durability 2.4
Bioindividuality 3.3

Downside

Safety Risk 1.7
Side Effects 1.8
Cost 1.8
Effort 1.6
Opportunity Cost 2.2
Dependency 1.4
Reversibility 1.4

Best at:

Cardiovascular 6.5
Metabolic Health 6.0
Liver Detox 6.0
Heavy Metal Detox 5.5

Cracked-cell-wall freshwater green algae. BioHarmony 6.5, worth trying.

Read full BioHarmony report →

Head-to-Head Verdict

Use Case	Winner	Rationale
Cardiovascular	Spirulina	Spirulina 7.5 against chlorella 6.5, though the pooled numbers sit closer than that gap suggests. Spirulina's report puts systolic pressure down about 4.6 mmHg and diastolic about 7 mmHg, biggest in people who start hypertensive. Fallah 2018 pooled 19 chlorella trials for total cholesterol down 9.09 mg/dL and systolic down 4.51 mmHg.
Blood Sugar	Spirulina	Spirulina 7.0 against chlorella 5.0, the clearest metabolic gap between them. Spirulina's report reports meaningful drops in fasting glucose across pooled trials, and its glycemic protocol runs 2 to 8 g a day for 8 to 12 weeks. Chlorella's fasting-glucose movement in Fallah 2018 was 4.23 mg/dL, real but small.
Heavy Metal Detox	Chlorella	Chlorella 5.5 against spirulina 3.0, and this is the row people search for. The mechanism is gut sequestration: the rigid cell wall binds fat-soluble toxins before they are absorbed. Nakano 2007 gave 6 g a day to 35 pregnant women and cut breast-milk dioxin toxic equivalents significantly. Read the next row before you buy on this one.
Liver Detox	Chlorella	Chlorella 6.0 against spirulina 5.5, and it is the only row with a dedicated enzyme meta-analysis. Yarmohammadi 2021 pooled 8 trials and found AST down 9.15 U/L, with ALT and ALP not reaching significance. Ebrahimi-Mameghani 2014 ran 1.2 g a day with vitamin E for 8 weeks in 55 people with fatty liver and dropped ALT 13.2 IU/L against 5.73 on placebo.
Respiratory	Spirulina	Spirulina 6.5 against chlorella 2.0, the widest gap in the matrix. The spirulina report treats allergic rhinitis symptoms as a distinct use with its own trial evidence and an onset of several weeks of daily use. Chlorella's report has nothing in this column. If seasonal nasal symptoms are why you are shopping, this row ends the comparison.
Anti Inflammatory	Spirulina	Spirulina 6.0 against chlorella 4.0. The mechanism is phycocyanin and gamma-linolenic acid driving antioxidant and anti-inflammatory signaling through NF-kB, which is a targeted pathway rather than a nutrient load. Chlorella's anti-inflammatory case is a byproduct of its carotenoid and micronutrient content.
Body Composition	Spirulina	Spirulina 6.0 against chlorella 3.5. Neither is a weight-loss supplement, and the honest version of this row is that spirulina's edge comes from complete protein density and better cardiometabolic markers rather than from fat loss. Shiri 2025 reported a directional BMI reduction for chlorella, and directional is the right word.
Immune Function	Tie	Chlorella holds the higher subrating, 5.5 against 5.0, and the best-powered trial says otherwise. Halperin 2003 randomized 124 healthy adults around influenza vaccination and found no overall antibody benefit, with only a younger subgroup responding. Kwak 2012 raised NK-cell activity in 51 people and Otsuki 2011 raised salivary IgA in 15 men. Call it even.
Antioxidant	Tie	Both score 5.0, so there is nothing to choose here. Spirulina brings phycocyanin and carotenoids, chlorella brings beta-carotene and lutein, and neither report claims a measured advantage. Spirulina's own report notes that its antioxidant and inflammation results are the mixed part of its evidence base.
Gut Health	Tie	Chlorella 4.0 against spirulina 3.5, which is inside the noise. Chlorella has a mucosal IgA pathway and Otsuki 2011 measured raised salivary secretory IgA in a crossover trial of 15 men. That is a small study on a proxy marker. Neither algae has a gut-outcome trial worth choosing between.

Cost Comparison

Intervention	Monthly Cost	Notes
Spirulina	$10 to $25	Extracted from the source report, priced 2026-09-07, retail channel. That buys reputable third-party-tested powder or tablets at 3 to 5 g a day, which brackets the 1 to 4.5 g protocol used for blood pressure and lipids. Powder costs less per gram than tablets and tastes worse. Certification is the part you should refuse to economise on.
Chlorella	$10 to $50	ESTIMATE, priced 2026-09-07, retail channel. Quality cracked-cell-wall chlorella runs $10 to $25 a month at 5 g a day, and the cardiovascular protocol of 5 to 10 g a day doubles the top of that band to about $50. The liver protocol of 1.2 to 1.5 g a day costs far less, so your target decides your bill.
The difference	Up to $25 a month, driven by dose rather than price per gram	Per gram these two cost about the same. The spread comes from the studied dose: spirulina works at 1 to 4.5 g a day for its main endpoints, while chlorella's cardiovascular protocol runs 5 to 10 g.Both are among the cheapest supplements with human trial evidence behind them, so price is a weak reason to choose. A current certificate of analysis is worth more than any saving between them.

When to Switch

Both algae are slow, and both reports set the assessment window at 12 weeks with full effect at 12 weeks, so the only sensible way to judge either one is a before-and-after panel three months apart. Chlorella gives a first noticeable change at about 4 weeks and spirulina at about 6, which is early enough to feel like something and far too early to decide anything.

Move from chlorella to spirulina when blood pressure, fasting glucose or seasonal nasal symptoms are the target, since spirulina leads those rows 7.5, 7.0 and 6.5 against 6.5, 5.0 and 2.0, or when the 5 to 10 g daily chlorella dose has become a chore. Move from spirulina to chlorella when liver enzymes are the number you are watching, when a clinician is working on gut-level binding of fat-soluble toxins, or when phenylketonuria or active autoimmune disease rules spirulina out.

Running both is defensible in a way that most supplement stacking is not, because the mechanisms barely overlap, but it also doubles a contamination exposure you control only through certificates of analysis, so most people should pick one and buy the certified version of it.

Who Should Pick What?

Adult with mildly raised blood pressure who wants one cheap addition

Spirulina

Cardiovascular subrating 7.5, and the report's pooled effect is about 4.6 mmHg systolic and 7 mmHg diastolic, largest in people who start hypertensive. The dose is 1 to 4.5 g a day for at least 12 weeks. Take a home blood-pressure average before and after, or you will never know.

Prediabetic tracking fasting glucose

Spirulina

Blood-sugar subrating 7.0 against chlorella's 5.0. The glycemic protocol is 2 to 8 g a day for 8 to 12 weeks, and the pooled effect lands on fasting glucose more than on HbA1c, so pick fasting glucose as the number you follow.

Raised ALT with fatty liver on an ultrasound report

Chlorella

Liver subrating 6.0 against 5.5, and it has the specific protocol. Ebrahimi-Mameghani 2014 used 1.2 g a day with vitamin E for 8 weeks in 55 patients and dropped ALT 13.2 IU/L against 5.73 on placebo. Yarmohammadi 2021 pooled 8 trials for AST down 9.15 U/L.

Convinced you need to detox heavy metals

Tie

Neither, on the evidence you think you are buying. Chlorella's binding trial, Nakano 2007, measured dioxins in breast milk, which are fat-soluble organic pollutants rather than metals. If you suspect real metal exposure, that is a testing and medical question, not a supplement purchase.

Vegan worried about B12 status

Chlorella

Merchant 2015 gave 9 g a day to 17 vegans and vegetarians and lowered serum methylmalonic acid from 441 to 301 nmol/L at 30 days, with 88% showing more than a 10% reduction. That is an open-label study, not a randomized trial, so treat chlorella as a supporting player behind an actual B12 supplement.

Seasonal allergic rhinitis sufferer

Spirulina

Respiratory subrating 6.5 against chlorella's 2.0, the widest gap on the page. The spirulina report treats allergic rhinitis symptoms as a use case in their own right, with onset within several weeks of daily use. Chlorella has nothing to offer here.

Diagnosed with phenylketonuria, or managing active autoimmune disease

Chlorella

Spirulina is contraindicated in phenylketonuria because it contains phenylalanine, and its report flags a theoretical immune-stimulation flare risk in autoimmune disease. Chlorella has its own exclusions, so check warfarin and vitamin K sensitivity, iodine-sensitive thyroid disease and photosensitivity first.

On warfarin or another vitamin K sensitive anticoagulant

Spirulina

Chlorella is contraindicated with warfarin and other vitamin K sensitive anticoagulants, and green algae is a real source of vitamin K. Spirulina does not carry that exclusion, though you still want your prescriber to know about anything new you are adding.

Pregnant or breastfeeding

Tie

Neither without a clinician. Both reports list pregnancy and lactation as needing clinician guidance, and contamination risk carries more weight in pregnancy than at any other time. Nakano 2007 did dose pregnant women, but that was a supervised trial rather than a general recommendation.

Research Highlights

Mechanism Difference
These two algae are complementary rather than redundant. Spirulina works through signaling: phycocyanin, gamma-linolenic acid and carotenoids drive antioxidant and anti-inflammatory activity through NF-kB, which produces modest drops in blood pressure, LDL, triglycerides and fasting glucose.Chlorella works mostly inside the gut. Soluble fiber and plant sterols cut cholesterol absorption, and the rigid cell wall binds fat-soluble toxins before they cross the gut wall, with carotenoids and mucosal IgA as secondary effects. They meet only at LDL, and they get there by different routes.
Safety Comparison
Neither algae is intrinsically dangerous, and both carry an extrinsic risk you control at purchase. Uncertified open-pond spirulina can carry microcystin toxins or heavy metals, and poorly sourced chlorella can bioaccumulate lead, cadmium and arsenic. A current certificate of analysis is the actual safety measure.The exclusion lists differ. Spirulina is out in phenylketonuria and needs caution in active autoimmune disease. Chlorella is out with warfarin and other vitamin K sensitive anticoagulants, in iodine-sensitive thyroid disease, and with photosensitivity disorders. Halperin 2003 supports the benign tolerability picture.
Cost Comparison
Both are among the cheapest supplements with human evidence behind them. Spirulina runs $10 to $25 a month for third-party-tested powder or tablets at 3 to 5 g a day, extracted from the source report and priced 2026-09-07.Chlorella is an estimate of $10 to $50 for the same date, because quality cracked-cell-wall product runs $10 to $25 at 5 g a day and the cardiovascular protocol goes to 10 g. Dose drives the difference, not price per gram. The liver protocol at 1.2 to 1.5 g a day costs far less.
Heavy Metal Claim
Chlorella's detox subrating is 5.5 against spirulina's 3.0, and the claim behind it is narrower than the marketing. Nakano 2007 gave 6 g a day to 35 pregnant women and found significantly lower dioxin toxic equivalents in breast milk, alongside higher milk IgA. Dioxins are fat-soluble organic pollutants.Lead, cadmium, mercury and arsenic are a different problem, and no trial on either report shows chlorella clearing them from a person. The irony is that poorly sourced algae is itself a heavy-metal exposure, which is why both reports make a certificate of analysis non-negotiable.
Evidence Quality
The two reports are not evidenced the same way. Chlorella's carries 12 verified citations, including Fallah 2018 across 19 randomized trials, Yarmohammadi 2021 across 8, and Pinto-Leite 2025, which reviewed both algae and found a neutral pooled chlorella result on blood pressure and lipids.The spirulina report carries no verified citation list yet, so no spirulina study is named on this page. Its subratings and effect sizes come from the live report data. Treat spirulina's 7.0 as a well-argued score whose citations still need auditing.
Editorial Verdict
Spirulina scores 7.0 and chlorella 6.5, and for once the composite matches the advice. If you are buying one algae, buy certified spirulina. It leads on cardiovascular 7.5, blood sugar 7.0, inflammation 6.0 and respiratory 6.5, and it works at a smaller daily dose.Choose chlorella when liver enzymes are the target, when a clinician is working on gut-level binding of fat-soluble toxins, or when phenylketonuria rules spirulina out. Both are cheap enough that sourcing quality, not price, should decide the purchase.
No Head To Head Trial
No randomized trial has put spirulina against chlorella and reported a winner. Pinto-Leite 2025 is the closest thing in the evidence base, a systematic review examining both algae as adjuvants for cardiovascular risk factors, and the chlorella arm it pooled came out neutral.That means every row on this page is an indirect comparison, built from each report's own subratings and its own placebo-controlled evidence. Nobody has measured the two against each other in the same people at the same time.

Frequently Asked Questions

Is spirulina or chlorella better for heavy metals?: Chlorella, on the subratings, at 5.5 against spirulina's 3.0. The evidence is narrower than the claim. Nakano 2007 gave 6 g a day to 35 pregnant women and lowered dioxin toxic equivalents in breast milk, and dioxins are fat-soluble organic pollutants rather than metals.No trial on either report shows chlorella clearing lead, cadmium, mercury or arsenic from a person. Suspected metal exposure needs testing and a clinician, not a green powder.
Which algae should I take if I only take one?: Spirulina, for most people. It scores 7.0 against chlorella's 6.5 and leads cardiovascular 7.5 against 6.5, blood sugar 7.0 against 5.0, inflammation 6.0 against 4.0 and respiratory 6.5 against 2.0. It also works at 1 to 4.5 g a day for its main endpoints, against 5 to 10 g for chlorella's cardiovascular protocol.
Can I take spirulina and chlorella together?: Yes, and it makes more sense than most supplement stacking, because the mechanisms barely overlap. Spirulina works through phycocyanin and GLA signaling, while chlorella works through fiber, sterols and gut binding. They meet only at LDL. The catch is that you double a contamination exposure you control only through certificates of analysis.
Are spirulina and chlorella contaminated with heavy metals?: They can be, and that is the main risk with both. Uncertified open-pond spirulina can carry microcystin toxins or heavy metals, and poorly sourced chlorella can bioaccumulate lead, cadmium and arsenic from its growing water.Buy from a producer that publishes a current certificate of analysis: microcystins under 1 ppm for spirulina, and a full heavy-metal panel for chlorella. That certificate is worth more than any price difference between brands.
How long until either one does anything?: Give both 12 weeks. Chlorella gives a first noticeable change around 4 weeks and spirulina around 6, but the assessment window on both reports is 12 weeks and full effect lands at 12 weeks. Book the lipid panel, the fasting glucose or the liver enzymes before you start, then repeat at three months.
Which one is cheaper?: Spirulina, usually, at an extracted $10 to $25 a month for third-party tested powder or tablets at 3 to 5 g a day. Chlorella is an estimated $10 to $50, because quality cracked-cell-wall product runs $10 to $25 at 5 g a day and the cardiovascular protocol doubles that. Per gram they cost about the same, and dose is what separates them.
Who should avoid spirulina?: Anyone with phenylketonuria, because spirulina contains phenylalanine. Use caution with active autoimmune disease, where immune stimulation could theoretically trigger a flare, and with known algae or seafood protein hypersensitivity. Pregnancy, lactation and giving it to children all need clinician guidance, and uncertified open-pond product is out for everyone.
Who should avoid chlorella?: Anyone on warfarin or another vitamin K sensitive anticoagulant. Also iodine-sensitive thyroid disease, known algae allergy and photosensitivity disorders, since rare photosensitivity has been reported in sensitive people. Pregnancy and breastfeeding need clinician guidance, and untested low-cost powder carries the heavy-metal risk that makes the whole category worth checking.
Does either algae help with allergies?: Spirulina does, on its report's own scoring, with a respiratory subrating of 6.5 against chlorella's 2.0. Allergic rhinitis is treated there as a distinct use case with trial evidence behind it and symptom relief within several weeks of daily use. Chlorella scores 2.0, which is the bottom of the range and means no case at all.

Evidence Sources

Systematic review Effect of Chlorella supplementation on cardiovascular risk factors: a meta-analysis of randomized controlled trials (2018) 19 RCTs, n=797. Total cholesterol down 9.09 mg/dL, LDL down 8.32 mg/dL, systolic blood pressure down 4.51 mmHg, fasting glucose down 4.23 mg/dL.
Systematic review Effect of Chlorella vulgaris on liver function biomarkers: systematic review and meta-analysis (2021) 8 RCTs. AST fell 9.15 U/L with a 95% CI of -16.09 to -2.21. ALT and ALP were not significant.
RCT The effect of Chlorella vulgaris supplementation on liver enzymes, serum glucose and lipid profile in NAFLD (2014) n=55, 1.2 g a day plus vitamin E for 8 weeks. ALT fell 13.2 IU/L against 5.73 on placebo, with AST and ALP also reduced.
Systematic review Chlorella and Spirulina as adjuvants of cardiovascular risk factor control: systematic review and meta-analysis of RCTs (2025) Reviewed 12 chlorella studies and found a neutral pooled effect on blood pressure and lipids. The dissenting result, and the only paper covering both algae.
RCT Beneficial immunostimulatory effect of short-term Chlorella supplementation on NK cell activity (2012) n=51, 5 g a day for 8 weeks. Natural-killer-cell activity rose significantly, with IFN-gamma and IL-1beta also increased versus placebo.
RCT Safety and immunoenhancing effect of a Chlorella-derived supplement in healthy adults undergoing influenza vaccination (2003) Double-blind RCT, n=124. No overall vaccine antibody benefit, with only a younger subgroup responding. The honest negative immune result.
RCT Chlorella pyrenoidosa supplementation decreases dioxin and increases IgA concentrations in breast milk (2007) 35 pregnant women at 6 g a day. Breast-milk dioxin toxic equivalents significantly lower at P=0.003 and milk IgA higher at P=0.03.
RCT Salivary secretory immunoglobulin A secretion increases after 4 weeks ingestion of chlorella-derived supplement (2011) Crossover trial in 15 men. Salivary secretory IgA concentration and secretion rate rose against baseline and placebo.
Observational Nutritional supplementation with Chlorella pyrenoidosa lowers serum methylmalonic acid in vegans and vegetarians (2015) Open-label study, n=17 at 9 g a day. Serum methylmalonic acid fell from 441 to 301 nmol/L at 30 days, with 88% showing more than a 10% reduction.
Systematic review Chlorella supplementation diminishes cardiovascular risk factors in adults: GRADE-assessed systematic review and meta-analysis (2025) Directional reductions in total cholesterol, LDL, blood pressure, BMI and hs-CRP. Reinforces the cardiovascular signal alongside Fallah 2018.
RCT Effect of Chlorella-derived multicomponent supplementation on maximal oxygen uptake and serum vitamin B2 in young men (2017) n=34 at 6 g a day for 4 weeks. VO2max rose from 42.1 to 44.9 mL/kg/min with no change in placebo. Small trial on a multi-ingredient product.

Glossary

Quick reference for the medical and technical terms used in this comparison.

Phycocyanin Phycocyanin: The blue pigment protein that gives spirulina its color and carries most of its antioxidant and anti-inflammatory signaling. Chlorella has no equivalent.
GLA Gamma-Linolenic Acid: An omega-6 fatty acid concentrated in spirulina and involved in its anti-inflammatory effects. One of the reasons the two algae are not interchangeable.
Microcystin Microcystin: A liver toxin produced by blue-green algae in open ponds. The reason certified spirulina requires a certificate showing under 1 ppm.
COA Certificate of Analysis: A current lab report from the producer showing contaminant levels. The single most important thing to check before buying either algae.
Cracked cell wall Cracked Cell Wall Chlorella: Mechanically broken chlorella. The intact wall is poorly digestible, so cracked-cell product is the practical default for absorption.
Dioxins Dioxins: Fat-soluble organic pollutants that accumulate in body fat. The toxins chlorella was actually shown to lower in Nakano 2007, and they are not heavy metals.
NK cell Natural Killer Cell: An immune cell that kills infected and abnormal cells. Kwak 2012 raised NK-cell activity on 5 g a day of chlorella for 8 weeks.
sIgA Secretory Immunoglobulin A: The antibody that guards mucosal surfaces such as the mouth and gut. Otsuki 2011 raised salivary sIgA on a chlorella-derived supplement.
MMA Methylmalonic Acid: A blood marker that rises when B12 is low. Merchant 2015 lowered it from 441 to 301 nmol/L in vegans on 9 g a day of chlorella.

Nick Urban Health Optimization Researcher & CHEK Holistic Lifestyle Coach Level 2

I've taken spirulina daily for many years and rate it 8.2 out of 10, treating sourcing as the whole game

Reviewed Sep 7, 2026 · next review Dec 6, 2026

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