Interactions on record — worth a quick check against your medications. Based on 1 of 2 ingredients. Check your meds →
Dietary supplement

Chlorella Micro-Algae 1,230 mg Ingredients & Drug Interactions

by Nature's Way

Chlorella Micro-Algae 1,230 mg label
See full label image
Capsule Category: Botanical
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Oct 7, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Chlorella Micro-Algae 1,230 mg against your medications. The heart of this page is the interaction checker and the full interaction report — how this product’s ingredients may interact with prescription and over-the-counter medicines you may be taking.

Around that, we add a pharmacist’s high-level view of the product as a whole — what’s inside, the evidence for its stated use, how transparent the label is, and what safety data exists — so you can see the full picture in one place. It’s educational information from our licensed clinical databases and the clinical staff at HelloPharmacist — not medical advice — and we don’t sell or endorse products. Our editorial policy

The interaction bottom line Most serious interaction: Moderate

Chlorella Micro-Algae 1,230 mg is a dietary supplement by Nature's Way with 2 active ingredients. Its ingredients are commonly taken for general nutrition and 'detox' support, immune support, liver and kidney support.Based on those ingredients, 337 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are Chlorella. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against Chlorella Micro-Algae 1,230 mg by Nature's Way

Ask about any prescription or over-the-counter medication and we check it for interactions with Chlorella Micro-Algae 1,230 mg by Nature's Way — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of Chlorella Micro-Algae 1,230 mg by Nature's Way

Our pharmacy team’s full take, with four database checks built into the cards below — a summary of what is known, not a grade of the product itself.

From our pharmacy team — supplement deep dive

Generated from HelloPharmacist’s pharmacist-curated databases and editorial rules · Last generated Oct 8, 2026

What’s inside

Full disclosure
Ingredient Transparency · database check
Full

Every active ingredient lists its own amount on the label.

Why this rating?
  • The label discloses an exact amount for 1 of its 1 active ingredient.
  • No proprietary blends here — you can verify the dose of every single component.

This product has one active ingredient: chlorella, a micro-algae. Chlorella is the subject of the monograph we hold for it, which covers its interactions, effectiveness, and safety.

Hypromellose is listed as an inactive ingredient, meaning it is an added material such as a capsule component rather than the active ingredient.

Does it work?

Couldn't assess
Evidence for Intended Use · database check
By FDA rules, dietary supplements can’t claim to treat, cure, or prevent disease — so labels speak in careful marketing language. We discern each product’s intended use from its name, label claims, and label statements, then grade the clinical evidence for that use. How these ratings are computed
Not assessable

We hold no graded evidence for this product's ingredients for its stated purpose.

Why this rating?
  • The label markets this product for: antioxidant pathway support.
  • We looked for evidence on: Oxidative stress.
  • Our graded evidence for these ingredients doesn't cover that particular purpose.

The strongest rating we hold for chlorella is Possibly Effective, and only for pregnancy-related iron deficiency. For athletic performance, brain tumors, nonalcoholic fatty liver disease (NAFLD), and exercise-induced respiratory infections, our data rates the evidence as Insufficient Reliable Evidence To Rate, which means we cannot say whether it works for those uses.

The evidence, ingredient by ingredient Chlorella

How safe is it?

Well-documented data
Safety Information · database check
Well characterized

Adverse-effect, pregnancy, and general safety data are on file for most of these ingredients.

Why this rating?
  • We hold adverse-effect (side-effect) data for 1 of the 1 matched ingredient.
  • Pregnancy & breastfeeding safety ratings cover 1 of 1.
  • General safety write-ups exist for 1 of 1.
  • Remember: this measures how much safety information exists. Thin data is not the same as being safe.

Our safety notes describe chlorella as generally well tolerated in the short term, but product quality and purity vary widely between brands. Common side effects include stomach upset such as cramping, constipation, diarrhea, nausea, gas, and fatigue, along with stool discoloration and sun sensitivity.

Allergic reactions, including asthma and anaphylaxis (a severe allergic reaction), are rare but have been reported. Our safety notes also say there is not enough safety data for chlorella, and advise people to avoid it unless their doctor directs otherwise.

For pregnancy, our data lists it as Possibly Safe. Our data does not include a breastfeeding rating for chlorella, so we cannot tell you its status there.

Talk with your doctor or pharmacist about your own situation.

Side effects, ingredient by ingredient Chlorella

Meds to double-check

Moderate interaction found
Known Interaction Concern · database check
Moderate identified

The most serious documented interaction for these ingredients is Moderate. Check your medications for a personalized result.

Why this rating?
  • 1 of the 1 matched ingredient can interact with medications — Chlorella.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs.
  • For scale: 337 individual medications appear in the full list. A big number alone doesn't make a product dangerous — what matters is whether YOUR medication is on it, so run yours through the interaction checker on this page.

Before taking this product, double-check any blood thinners (anticoagulants) such as warfarin, which carry a Moderate interaction rating, because chlorella's vitamin K may reduce their effect. Also check photosensitizing drugs, which carry a Moderate rating, since chlorella can increase sun sensitivity.

Confirm both with your own doctor or pharmacist.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. Moderate medication interactions have been identified, and safety information is well characterized.

Chlorella may be worth discussing if you are dealing with pregnancy-related iron deficiency, since that is the only use our data rates as Possibly Effective. If you take warfarin or any medication that makes your skin sensitive to sunlight, or you are pregnant or breastfeeding, be careful and talk it over with your own doctor or pharmacist before starting.

Our safety notes say to avoid it unless a doctor approves.

Educational only — not medical advice; always confirm with your pharmacist. Our editorial policy · How we use AI

Assessment coverage: 1 of 1 active ingredient matched to our full ingredient reviews (monographs). Based on the product label dated Mar 25, 2025.

This Scorecard evaluates available label information, ingredient evidence, and known medication-safety considerations. It does not independently verify product identity, purity, potency, contamination, or manufacturing quality. How these ratings are computed

At a glance

General information

Key facts about Chlorella Micro-Algae 1,230 mg, straight from the product label.

Brand Nature's Way
Barcode (UPC) 033674118504
Net contents 100 Vegan Capsule(s)
Market status On market
Date entered into DSLD Mar 25, 2025
DSLD ID 327914
Product type Botanical
Supplement form Capsule
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), Gluten Free, Dairy Free
From the label
Everything in this section is reproduced from the manufacturer’s own product label — it’s the label speaking, not HelloPharmacist. We show it so you can see exactly what the maker states; we don’t verify or endorse those statements.

Supplement Facts

The label details for Chlorella Micro-Algae 1,230 mg by Nature's Way, sourced from the NIH Dietary Supplement Label Database.

Supplement Facts

Daily Value (DV) Target Group(s):
Adults and children 4 or more years of age
Minimum serving Sizes:
3 Capsule(s)
Maximum serving Sizes:
3 Capsule(s)
Servings per container
33
UPC/BARCODE
033674118504
IngredientAmount% DV
Calories5 Calorie(s)--
Protein1 Gram(s)2%
Chlorella1.23 Gram(s)--

Other ingredients: Hypromellose

Tap any ingredient to jump to its full detail below.

Label statements
These statements are the manufacturer’s wording, reproduced from the product label — the label is saying it, not HelloPharmacist. We don’t verify or endorse them.
Formula

Superfood Ingredient Chlorella is a green single-cell organism

Chlorella Micro-Algae 1,230 mg per 3-capsule serving Superfood

Formulation

Supports antioxidant pathways Botanicals are sourced where they grow best Made with the quality you trust

Bottled and tested in the USA

Vegan Gelatin Free

Vegan Gelatin Free

Plant powered

Non GMO Project Verified nongmoproject.org

Gluten free. No salt, wheat, corn, soy, dairy, gelatin, or artificial colors, flavors, or preservatives.

General Statements

Explore more products at naturesway.com Questions? 1-800-962-8873 / naturesway.com 50% Bottle made from 50% post-consumer recycled plastic

Brand IP Statement(s)

Copyright 2024 Nature's Way Brands, LLC

Seals/Symbols

Vegan Gelatin Free

Non GMO Project Verified nongmoproject.org

FDA Disclaimer Statement

This statement has not been evaluated by the Food & Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

FDA Statement of Identity

Dietary Supplement

Suggested/Recommended/Usage/Directions

Recommendation: Adults take 3 capsules three times daily.

Precautions

If you are pregnant, nursing, or taking any medications, consult a healthcare professional before use.

Contains the amino acid Phenylalanine.

Keep out of reach of children.

Safety sealed with inner seal. Do not use if seal is broken or missing.

Storage

Keep tightly closed. Store at room temperature. Avoid excessive heat and direct sunlight.

Is this label outdated? Report a formula or label change and our pharmacy team will review it.

See for yourself

Chlorella Micro-Algae 1,230 mg by Nature's Way label

The label scan from the NIH Dietary Supplement Label Database. Tap to enlarge.

Chlorella Micro-Algae 1,230 mg label

Label images are published by the NIH Dietary Supplement Label Database for the version of this product on file. Always read your actual product label.

View the full label (PDF)
What’s inside

The Ingredients in Chlorella Micro-Algae 1,230 mg by Nature's Way

These are the 2 active ingredients this product is made of. Select any to open its full monograph.

Serving size3 Capsule(s) Dosage formCapsule Servings per container33 Amounts shown are per serving.

Most supplement products combine several ingredients, and a medication can interact with the product through any one of them. Each ingredient below shows whether it has known drug interactions.

Protein

1 Gram(s) per serving

Chlorella

Interacts with
337 drugs
1.23 Gram(s) per serving

Chlorella is a nutrient-rich freshwater green algae taken as a supplement for general wellness, immune support, and 'detox.' Some small studies sugges...

Chlorella monograph & interactions

Other (inactive) ingredients: Hypromellose. These complete the product’s ingredient list but are not active constituents.

Interaction report

Chlorella Micro-Algae 1,230 mg by Nature's Way Drug Interactions

Want to check YOUR meds against Chlorella Micro-Algae 1,230 mg?

Ask about interactions with your drugs in plain English — “Can I take it with lisinopril?” — and we find you the answer in seconds, ingredient by ingredient.

 Go to the checker
337Drugs
337 Moderate

Ingredients driving the most interactions

Chlorella 337

Individual Drug Interactions

The ingredients in Chlorella Micro-Algae 1,230 mg interact with 337 drugs. Click any drug to see the details.

1 of the 2 ingredients in Chlorella Micro-Algae 1,230 mg interact with drugs. Each result below shows which ingredient is responsible. Chlorella

Each ingredient & the kinds of drugs it affects

For each ingredient in Chlorella Micro-Algae 1,230 mg with known interactions, here are the types of medications it can affect. Open any type for the detail — or search your exact drug in the checker above.

Chlorella2 drug types · 337 drugs

Photosensitizing Drugs

Theoretically, chlorella might have additive effects with photosensitizing drugs.
Chlorella has been reported to cause photosensitization. In five case reports, patients who had ingested chlorella exhibited swelling followed by erythematopurpuric lesions on sun-exposed areas of the body. Theoretically, concomitant use with photosensitizing drugs may exacerbate effects.

Likelihood Possible Evidence D
Warfarin (Coumadin)

Theoretically, chlorella might reduce the clinical effects of warfarin.
Chlorella contains significant amounts of vitamin K. There is at least one case report of warfarin therapy becoming sub-therapeutic after initiation of chlorella supplements.

Likelihood Possible Evidence D
Chlorella full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Chlorella Micro-Algae 1,230 mg, from the product label.

Nature's Way

See all Nature's Way products
Name
Nature's Way Brands, LLC
City
Green Bay
State
WI
ZipCode
54311
Phone Number
1-800-962-8873
Web Address
naturesway.com
Pharmacist Counseling Corner

Chlorella Micro-Algae 1,230 mg by Nature's Way: Common Questions

Does Chlorella Micro-Algae 1,230 mg by Nature's Way interact with any medications?
Yes. Based on its ingredients, Chlorella Micro-Algae 1,230 mg has a known interaction with 337 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
Chlorella Micro-Algae 1,230 mg contains 2 active ingredients, and an interaction can come from any of them. We check every ingredient, combine the results into one list per medication, and show which ingredient and mechanism is responsible.
Where does this information come from?
The product label data comes from the NIH Dietary Supplement Label Database (DSLD); the interaction data is built on the Natural Medicines database and reviewed by HelloPharmacist pharmacists.
Is chlorella safe to take during pregnancy?
Our data lists chlorella as Possibly Safe in pregnancy. That is not a guarantee, so talk with your doctor or pharmacist about your own situation before taking it.
What are the common side effects of chlorella?
Common side effects include stomach cramping, gas, nausea, diarrhea, constipation, fatigue, and stool discoloration. Chlorella can also make your skin more sensitive to sunlight, and allergic reactions are possible.
Does chlorella work for iron deficiency during pregnancy?
Our data rates chlorella as Possibly Effective for pregnancy-related iron deficiency. Its evidence for other uses, such as athletic performance or fatty liver disease, is rated Insufficient Reliable Evidence To Rate.
What is chlorella used for?
Our data covers several uses, including pregnancy-related iron deficiency, athletic performance, brain tumors, nonalcoholic fatty liver disease (NAFLD), and exercise-induced respiratory infections. Only pregnancy-related iron deficiency is rated Possibly Effective; the rest are rated Insufficient Reliable Evidence To Rate.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Not sure if Chlorella Micro-Algae 1,230 mg is safe with your meds?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

Label information is sourced from the NIH Dietary Supplement Label Database and reflects the product version on file; always read your actual product label. This page is for education only and is not a substitute for professional medical advice. Confirm with your pharmacist or doctor before combining supplements and medications.

Chlorella Micro-Algae 1,230 mg label
Go deeper

The Full Monographs Behind Chlorella Micro-Algae 1,230 mg’s Ingredients

Every ingredient we hold a full HelloPharmacist monograph for — uses, evidence, safety, and the complete interaction list.

Herb & supplement monograph

Chlorella

Interacts with 337 drugs

Chlorella is a nutrient-rich freshwater green algae taken as a supplement for general wellness, immune support, and 'detox.' Some small studies suggest possible benefits for cholesterol, blo...

Read the full Chlorella monograph →
Sources

Sources & How We Checked

Chlorella Micro-Algae 1,230 mg's label data comes from the NIH Dietary Supplement Label Database; the ingredient interaction data is from the Natural Medicines database, reviewed by our pharmacists.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

The 13 references behind this product’s interaction data

Every citation that drives the interaction findings for this product’s ingredients, from the evidence-graded Natural Medicines (TRC Healthcare) database. Open an ingredient to browse its citations — links open the study on PubMed or the publisher’s site.

Chlorella 13 references
  1. Peirce A. The American Pharmaceutical Association Practical Guide to Natural Medicines. New York, NY: William Morrow and Co., 1999.
  2. Ng TP, Tan WC, Lee YK. Occupational asthma in a pharmacist induced by chlorella, a unicellular algae preparation. Resp Med 1994;88:555-7. PubMed
  3. Jitsukawa K, Suizu R, Hidano A. Chlorella photosensitization. New phytophotodermatosis. Int J Dermatol 1984;23:263-8. PubMed
  4. Merchant RE, Carmack CA, Wise CM. Nutritional supplementation with Chlorella pyrenoidosa for patients with fibromyalgia syndrome: a pilot study. Phytother Res 2000;14:167-73.
  5. Merchant RE, Rice CD, Young HF. Dietary Chlorella pyrenoidosa for patients with malignant glioma: effects on immunocompetence, quality of life, and survival. Phytother Res 1990;4:220-31.
  6. Halperin SA, Smith B, Nolan C, et al. Safety and immunoenhancing effect of a Chlorella-derived dietary supplement in healthy adults undergoing influenza vaccination: randomized, double-blind, placebo-controlled trial. CMAJ 2003;169:111-7..
  7. Ohtake, T., Negishi, K., Okamoto, K., Oka, M., Maesato, K., Moriya, H., and Kobayashi, S. Manganese-induced Parkinsonism in a patient undergoing maintenance hemodialysis. Am J Kidney Dis 2005;46(4):749-753. PubMed
  8. Ng, T. P., Tan, W. C., and Lee, Y. K. Occupational asthma in a pharmacist induced by Chlorella, a unicellular algae preparation. Respir.Med. 1994;88(7):555-557. PubMed
  9. Ohkawa, S., Yoneda, Y., Ohsumi, Y., and Tabuchi, M. [Warfarin therapy and chlorella]. Rinsho Shinkeigaku 1995;35(7):806-807.
  10. Azocar J, Diaz A. Efficacy and safety of chlorella supplementation in adults with chronic hepatitis C virus infection. World J Gastroenterol 2013;19(7):1085-90. PubMed
  11. Panahi Y, Badeli R, Karami GR, Badeli Z, Sahebkar A. A randomized controlled trial of 6-week Chlorella vulgaris supplementation in patients with major depressive disorder. Complement Ther Med 2015;23(4):598-602. PubMed
  12. Nakano S, Takekoshi H, Nakano M. Chlorella pyrenoidosa supplementation reduces the risk of anemia, proteinuria and edema in pregnant women. Plant Foods Hum Nutr 2010;65(1):25-30. PubMed
  13. Yavasoglu I, Turgutkaya A, Bolaman Z. Chlorella-induced thrombocytopenia. Sao Paulo Med J 2018;136(6):602-3. PubMed

See these in context on the Chlorella monograph →

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

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