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

Yaeyama Chlorella Ingredients & Drug Interactions

by Jarrow Formulas

Yaeyama Chlorella label
See full label image
Capsule Category: Other Combinations
Most serious interaction: Moderate
Clinical methodology reviewed by · Updated Sep 16, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Yaeyama Chlorella 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

Yaeyama Chlorella is a dietary supplement by Jarrow Formulas 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 Yaeyama 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 Yaeyama Chlorella by Jarrow Formulas

Ask about any prescription or over-the-counter medication and we check it for interactions with Yaeyama Chlorella by Jarrow Formulas — and tell you which ingredient is responsible.

Pharmacist-reviewed data Checks every ingredient Answer in seconds
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HelloPharmacist Scorecard of Yaeyama Chlorella by Jarrow Formulas

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 Jul 11, 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.

Yaeyama Chlorella is a single-ingredient supplement — just chlorella, a freshwater algae, in a capsule. The inactive ingredients are cellulose, magnesium stearate, silicon dioxide, and the capsule itself.

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: Provides RNA, DNA and Chlorophyll.
  • Our graded evidence for these ingredients doesn't cover that particular purpose.

The evidence here is mixed. Chlorella is possibly effective for pregnancy-related iron deficiency — that's the one use with some supporting data.

For brain tumor, nonalcoholic fatty liver disease, depression, and fatigue, we don't have enough reliable evidence to say whether it works. If you're interested in it for one of those other uses, talk with your doctor about whether the current data supports trying it.

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.

Short-term, chlorella is generally well tolerated, but product quality and purity vary a lot from brand to brand — that's something to keep in mind. The most common side effects are allergic reactions, stomach cramping, constipation, diarrhea, fatigue, gas, nausea, sensitivity to sun exposure, and darkened stools, especially in the first two weeks.

Rarely, anaphylaxis (a serious allergic reaction) has been reported. Asthma and anaphylaxis have also been reported in people preparing chlorella tablets.

Because long-term safety data is limited, avoid this supplement unless your doctor approves it.

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 you start, double-check if you take warfarin (Coumadin) or any blood thinners in that class — chlorella can reduce their effectiveness. Also check any photosensitizing drugs you're on, where chlorella might add to sun sensitivity.

Use the search tool on this page with your exact medications.

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.

If you're pregnant with iron deficiency and your doctor recommends it, chlorella may help — but check with them first. If you take warfarin or any photosensitizing medication, run those through our checker before you consider this.

Talk to your pharmacist about product quality too, since it varies widely.

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 Jan 25, 2020.

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 Yaeyama Chlorella, straight from the product label.

Brand Jarrow Formulas
Barcode (UPC) 790011170037
Net contents 150 Capsule(s)
Market status On market
Date entered into DSLD Jan 25, 2020
DSLD ID 212141
Product type Other Combinations
Supplement form Capsule
Dietary claims / uses Nutrient, All Other, Structure/Function
Intended target group(s) 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 Yaeyama Chlorella by Jarrow Formulas, 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:
5 Capsule(s)
Maximum serving Sizes:
5 Capsule(s)
Servings per container
30
UPC/BARCODE
790011170037
IngredientAmount% DV
Calories10 Calorie(s)--
Protein1 Gram(s)2%
Yaeyama Chlorella2 Gram(s)--

Other ingredients: Cellulose, Magnesium Stearate, Silicon Dioxide, Capsule

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.
Suggested/Recommended/Usage/Directions

Usage: Take 5 capsules per day with juice or water or as directed by your healthcare professional.

Precautions

Note: If you have a medical condition, are pregnant, lactating, trying to conceive, under the age of 18, or taking medications, consult your healthcare professional before using this product.

Note: If you have a medical condition, are pregnant, lactating, trying to conceive, under the age of 18, or taking medications, consult your healthcare professional before using this product.

Keep out of the reach of children.

Formula

Yaeyama Chlorella is a single-celled, fresh water algae, grown in the environmentally pristine coral reef region of Japan's Ishigaki Island. Yaeyama Chlorella cell walls are broken by a high impact, jet spray drying process. Yaeyama Chlorella provides chlorophyll, RNA, DNA and proteins, and is a source of naturally occurring vitamins and minerals. Yaeyama Chlorella supports healthy cell function and promotes detoxification, especially heavy metal excretion. "Yaeyama" means richer, more flavorful and more nutritious chlorella!

Provides RNA, DNA and Chlorophyll

Storage

Store in a cool, dry place.

FDA Disclaimer Statement

These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

General Statements

Japan Ishigaki Island

FDA Statement of Identity

Dietary Supplement

Formulation

No wheat, gluten, soybeans, dairy, egg, fish/shellfish, or peanuts/tree nuts.

Brand IP Statement(s)

2018 Jarrow Formulas

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

See for yourself

Yaeyama Chlorella by Jarrow Formulas label

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

Yaeyama Chlorella 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 Yaeyama Chlorella by Jarrow Formulas

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

Serving size5 Capsule(s) Dosage formCapsule Servings per container30 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

Yaeyama Chlorella

Interacts with
337 drugs
2 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...

Yaeyama Chlorella monograph & interactions

Other (inactive) ingredients: Cellulose, Magnesium Stearate, Silicon Dioxide, Capsule. These complete the product’s ingredient list but are not active constituents.

Interaction report

Yaeyama Chlorella by Jarrow Formulas Drug Interactions

Want to check YOUR meds against Yaeyama Chlorella?

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

Yaeyama Chlorella 337

Individual Drug Interactions

The ingredients in Yaeyama Chlorella interact with 337 drugs. Click any drug to see the details.

1 of the 2 ingredients in Yaeyama Chlorella interact with drugs. Each result below shows which ingredient is responsible. Yaeyama Chlorella

Each ingredient & the kinds of drugs it affects

For each ingredient in Yaeyama Chlorella 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.

Yaeyama 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
Yaeyama Chlorella full monograph & interactions
The maker

Brand information

Manufacturer and brand details for Yaeyama Chlorella, from the product label.

Jarrow Formulas

See all Jarrow Formulas products
Name
Jarrow Formulas Superior Nutrition and Formulation
Street Address
P.O. Box 35994
City
Los Angeles
State
CA
ZipCode
90035-4317
Web Address
www.Jarrow.com
Pharmacist Counseling Corner

Yaeyama Chlorella by Jarrow Formulas: Common Questions

Does Yaeyama Chlorella by Jarrow Formulas interact with any medications?
Yes. Based on its ingredients, Yaeyama Chlorella 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?
Yaeyama Chlorella 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.
Can I take this if I'm pregnant?
Chlorella is possibly effective for pregnancy-related iron deficiency, which is a promising sign — but we don't have enough safety data to say it's definitely safe during pregnancy. Talk with your doctor or pharmacist about whether it's right for you.
What's actually in this product?
It's just one active ingredient: Yaeyama chlorella, a type of freshwater algae. The capsule itself and a few inactive ingredients like cellulose and magnesium stearate help hold it together.
Could this cause sun sensitivity?
Yes — chlorella has been reported to cause photosensitization. In case reports, people taking it developed swelling and red blotchy lesions on sun-exposed skin. If you're prone to sun sensitivity or take a drug that increases it, be extra cautious.
What side effects should I expect?
Most commonly, stomach cramping, diarrhea, constipation, gas, nausea, and darkened stools, especially in your first two weeks. Allergic reactions are also possible. Rarely, anaphylaxis has been reported.
Does this actually work?
The strongest evidence is for pregnancy-related iron deficiency — that's possibly effective. For brain tumors, fatty liver disease, depression, and fatigue, we don't have enough reliable evidence to say either way.

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

Not sure if Yaeyama Chlorella is safe with your meds?

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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.

Yaeyama Chlorella label
Go deeper

The Full Monographs Behind Yaeyama Chlorella’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

Yaeyama Chlorella'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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