What is chlorella algae?

Chlorella is a single-celled freshwater green algae used as a dietary supplement. It is valued for its protein, chlorophyll, vitamins, minerals, and antioxidant compounds.

What are the main benefits of chlorella?

Chlorella is most often used to support detoxification processes, immune function, and healthy cholesterol and triglyceride levels. Evidence is emerging but not definitive for these uses.

What is a typical chlorella dosage?

A common supplemental range is about 2,000–3,000 mg per day. Product potency varies, so follow the label and consider starting with a lower dose to assess tolerance.

Why does “broken cell wall” chlorella matter?

Chlorella has a tough cell wall that can limit digestion and nutrient absorption. “Broken cell wall” or “cracked cell wall” products are processed to improve bioavailability.

Who should be cautious with chlorella?

People with algae sensitivities, those who are pregnant or breastfeeding, and anyone with autoimmune conditions or on immunosuppressants should consult a clinician. Those taking blood thinners should also ask a healthcare professional due to potential vitamin K content in some products.

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Chlorella Algae

Moderate study situation·7/10

A higher score indicates better study conditions, but not necessarily effectiveness.

Chlorella is a nutrient-rich green algae supplement with potential detox, immune, and cholesterol benefits.

Essential Nutrient Antioxidant Immune Booster Cholesterol Management

dose range

2000–3000 mg

Divided daily in 2–3 doses with meals

Consumption

Use 'broken cell wall' chlorella for improved nutrient absorption and take with food.

Not fat-soluble.

Best time

Take in the morning or with first/second meal for best digestive tolerance.

Description

Chlorella, a single-celled freshwater green algae, is popular as a dietary supplement for its dense nutritional profile, including proteins, vitamins (such as B12 in some forms), minerals, chlorophyll, and antioxidants. Its cell wall must be broken for optimal absorption. Used primarily to support detoxification, immune health, and lipid metabolism, chlorella's effects are supported by emerging but not definitive clinical evidence.

benefits

Main effects with level of evidence

Moderate

Note on evidence

Animal and small human studies suggest multiple benefits, but larger, longer-term research is limited.

Detoxification Support (Heavy Metals)

Moderate

Chlorella may help the body reduce heavy metal burden (such as lead and mercury) by binding these metals in the digestive tract and supporting excretion.

Particularly relevant for: Adults with known exposure to heavy metals · General wellness

S1 · PubMed: Chlorella Effects on Heavy Metal Detoxification S6 · Examine.com: Chlorella

Immune System Support

Moderate

Supplementation can increase markers of immune activity, such as natural killer cell function and antibody response in healthy adults.

Particularly relevant for: Immune-compromised individuals · General wellness

S3 · PubMed: Effects of Chlorella on Immune Function S6 · Examine.com: Chlorella

Cholesterol Management

Moderate

Chlorella may help lower total and LDL cholesterol and triglycerides, with modest increases in HDL cholesterol observed in clinical trials.

Particularly relevant for: Adults with mild hypercholesterolemia · General wellness

S4 · PubMed: Cholesterol-lowering Effects of Chlorella S6 · Examine.com: Chlorella

Dense Source of Essential Nutrients and Antioxidants

Limited

Provides complete protein, vitamins (including B12 in some strains), minerals, and antioxidant compounds like chlorophyll and carotenoids.

Particularly relevant for: Vegetarians · Vegans · General wellness

S5 · NIH ODS: Chlorella (Herbs at a Glance)S6 · Examine.com: Chlorella

Safety & Information

Important safety information & known risks

For educational purposes only • not medical advice

Generally well-tolerated in healthy adults, but caution in high-risk groups due to immune and iodine effects.

warning notices

May cause mild gastrointestinal symptoms (nausea, diarrhea, green stools) in some individuals.
Iodine content can trigger reactions in sensitive individuals or those with thyroid disease.
Potential for immune stimulation poses risks for people on immunosuppressants or with autoimmune disorders.
Insufficient safety data for use during pregnancy or breastfeeding.
Avoid if allergic to iodine or seaweed.
Avoid use if you have autoimmune diseases unless under clinician supervision.
Monitor closely if taking immunosuppressant or anticoagulant medications (such as warfarin).
Do not use if pregnant or breastfeeding due to insufficient safety data.

Known interactions with medications

Immunosuppressants
Anticoagulants (e.g., warfarin)

Contraindications / special precautions

Iodine allergy
Autoimmune diseases (unless supervised)
Pregnant or breastfeeding

interactions

Important interactions between active ingredient ↔ supplement / medication / food

Chlorella may interact with immunosuppressant and anticoagulant drugs, and with other iodine-rich supplements.

Potential to stimulate immune function and interfere with immunosuppressive therapies.

drug · Immunosuppressants

CautionLimited

Why

Chlorella may enhance immune activity, potentially reducing the effectiveness of immunosuppressant drugs.

recommendation

Consult a healthcare provider before combining.

S2 · WebMD: Chlorella Supplement Overview S3 · PubMed: Effects of Chlorella on Immune Function S5 · NIH ODS: Chlorella (Herbs at a Glance)

May reduce effectiveness of warfarin or increase risk of bleeding due to high vitamin K content in some chlorella.

drug · Warfarin and other anticoagulants

CautionLimited

Why

Vitamin K in chlorella may antagonize the effect of warfarin and similar drugs.

recommendation

Monitor INR closely and consult a healthcare provider before use.

S2 · WebMD: Chlorella Supplement Overview S5 · NIH ODS: Chlorella (Herbs at a Glance)

Potential risk of excess iodine in sensitive individuals.

nutrient · Iodine

CautionLimitedIodine

Why

Chlorella naturally contains variable amounts of iodine, which may exacerbate thyroid disorders or cause reactions in those with iodine sensitivity.

recommendation

Avoid chlorella in the presence of known iodine allergy or thyroid dysfunction unless directed by a clinician.

S2 · WebMD: Chlorella Supplement Overview S5 · NIH ODS: Chlorella (Herbs at a Glance)

mechanisms of action

Brief explanations of how it works

Chelation and Binding of Heavy Metals

Cell wall components of chlorella bind to heavy metals and toxins in the gut, aiding in their elimination.

S1 · PubMed: Chlorella Effects on Heavy Metal Detoxification S6 · Examine.com: Chlorella

Immune Modulation

Chlorella enhances natural killer cell activity and cytokine production, supporting immune defenses.

S3 · PubMed: Effects of Chlorella on Immune Function S6 · Examine.com: Chlorella

Lipid Metabolism Modulation

Fibers and antioxidants in chlorella contribute to reduced cholesterol absorption and improved lipid profiles.

S4 · PubMed: Cholesterol-lowering Effects of Chlorella S6 · Examine.com: Chlorella

Sources & References

Primary literature and reviews on which these statements are based

7 sources

PubMed: Chlorella Effects on Heavy Metal Detoxification

WebMD: Chlorella Supplement Overview

PubMed: Effects of Chlorella on Immune Function

PubMed: Cholesterol-lowering Effects of Chlorella

NIH ODS: Chlorella (Herbs at a Glance)

Examine.com: Chlorella

EFSA Panel on Food Additives and Nutrient Sources: Chlorella evaluation

Laatst bijgewerkt: 7 februari 2026

This information is for educational purposes only and does not replace medical advice.

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Botanicals & Natural Substances

164 items

Chlorella Algae

Description

benefits

Detoxification Support (Heavy Metals)

Immune System Support

Cholesterol Management

Dense Source of Essential Nutrients and Antioxidants

Safety & Information

interactions

Potential to stimulate immune function and interfere with immunosuppressive therapies.

May reduce effectiveness of warfarin or increase risk of bleeding due to high vitamin K content in some chlorella.

Potential risk of excess iodine in sensitive individuals.

mechanisms of action

Chelation and Binding of Heavy Metals

Immune Modulation

Lipid Metabolism Modulation

Sources & References

Botanicals & Natural Substances

Andere categorieën

Safety & Information

interactions

Potential to stimulate immune function and interfere with immunosuppressive therapies.

May reduce effectiveness of warfarin or increase risk of bleeding due to high vitamin K content in some chlorella.

Potential risk of excess iodine in sensitive individuals.

mechanisms of action

Chelation and Binding of Heavy Metals

Immune Modulation

Lipid Metabolism Modulation

Sources & References