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Dietary supplement

100% Organic Spirulina 500 mg Ingredients & Drug Interactions

by Vitamer Laboratories

100% Organic Spirulina 500 mg label
See full label image
Tablet Or Pill Category: Non-nutrient/non-botanical
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 100% Organic Spirulina 500 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

100% Organic Spirulina 500 mg is a dietary supplement by Vitamer Laboratories with 1 active ingredient. Its ingredients are commonly taken for general nutrition and energy, antioxidant support, cholesterol and metabolic health.Based on those ingredients, 327 medications have a known interaction with it, the most serious rated moderate. The ingredients most likely to interact are organic Spirulina. Use the checker below to test your specific medication, or read the full HelloPharmacist Interaction Report.

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Check Your Meds Against 100% Organic Spirulina 500 mg by Vitamer Laboratories

Ask about any prescription or over-the-counter medication and we check it for interactions with 100% Organic Spirulina 500 mg by Vitamer Laboratories — and tell you which ingredient is responsible.

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HelloPharmacist Scorecard of 100% Organic Spirulina 500 mg by Vitamer Laboratories

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.

This product contains a single active ingredient: organic spirulina, a blue-green algae, at 500 mg per tablet. There are no other inactive ingredients listed.

Does it work?

Moderate evidence
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

This product doesn't appear to be marketed for a specific use, so we graded Blue-green Algae's overall clinical evidence instead.

Moderate

Some clinical evidence supports Blue-green Algae for:

Why this rating?
  • The label markets general wellness (“General nutrition and antioxidant support”), not a specific health condition, so there is no single claim to grade against clinical-evidence data.
  • Since the label doesn't commit to one use, we graded the ingredient's overall clinical evidence instead.
  • On file: Hypertension — rated "Possibly Effective" (Natural Medicines).

Spirulina has been rated possibly effective for high blood pressure (hypertension) in our data. For acne, hay fever (allergic rhinitis), iron deficiency anemia, and arsenic poisoning, the evidence isn't established — we have insufficient reliable evidence to rate whether it works for these uses.

The evidence, ingredient by ingredient Blue-green Algae

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.

Spirulina is generally well tolerated when taken by mouth. The most common side effects in studies were stomach upset: abdominal cramps, bloating, diarrhea, dizziness, fatigue, gas, headache, nausea, and vomiting.

Allergic reactions including rashes and itching have occurred; one rare case of severe anaphylaxis (a life-threatening allergic reaction) was reported in a teenager. A small number of people taking spirulina reported mild gum bleeding or bruising.

A major caution: quality varies widely between products, and some spirulina supplements can be contaminated with toxins or heavy metals. The safety data available is limited, and contamination risk is a real concern — talk with your pharmacist about whether this product has been third-party tested for purity.

Side effects, ingredient by ingredient Blue-green Algae

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 — Blue-green Algae.
  • The most serious interaction on file is rated Moderate.
  • Some involve high-stakes drug classes: anticoagulant / antiplatelet drugs; immunosuppressants / transplant drugs; diabetes medications.
  • For scale: 327 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.

Double-check this product if you take blood thinners or antiplatelet drugs (Moderate severity), immunosuppressants (Moderate severity), or diabetes medications (Moderate severity). No interactions are documented beyond these three categories.

Check your own medication Run your meds through the checker above

The bottom line

Scorecard at a glanceFully disclosed formula with some supporting evidence behind its ingredients' uses. Moderate medication interactions have been identified, and safety information is well characterized.

Spirulina might help with high blood pressure, but the evidence for other uses isn't clear. If you take blood thinners, immunosuppressants, or diabetes medications, check with your pharmacist first.

Before you buy, ask whether the brand has been tested for heavy metals and toxins.

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 Nov 21, 2016.

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 100% Organic Spirulina 500 mg, straight from the product label.

Brand Vitamer Laboratories
Barcode (UPC) 719985141409
Net contents 100 Vegetarian Tablet(s)
Market status On market
Date entered into DSLD Nov 21, 2016
DSLD ID 67276
Product type Non-nutrient/non-botanical
Supplement form Tablet Or Pill
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Vegan, Vegetarian, Adult (18 - 50 Years), Organic, 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 100% Organic Spirulina 500 mg by Vitamer Laboratories, 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:
6 Tablet(s)
Maximum serving Sizes:
6 Tablet(s)
Servings per container
17
UPC/BARCODE
719985141409
IngredientAmount% DV
organic Spirulina3 Gram(s)--

Other ingredients: None

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.
Formulation

Our Ultimate Organics products do not contain conventional pesticides, synthetic fertilizers, growth hormones, genetic modification or antibiotics.

We source only natural, organic raw materials that promote the use of renewable resources and conservation and are reviewed by USDA-approved organic certifiers.

Pesticide and Herbicide free

This product is certified organic by Quality Assurance International (QAI).

Contains no artificial colors, flavors or preservatives; no wheat, gluten, milk, eggs, peanuts, tree nuts, soy, crustacean shellfish or fish.

Suitable for vegans.

Our 100% Organic Spirulina is a certified organic whole food concentrate, providing a naturally rich source of vitamins, trace minerals, mixed carotenoids, antioxidants, and essential fatty acids.

Precautions

BMAA (beta-N-methylamino-L-alanine) is a toxin sometimes associated with spirulina.

Warning: Accidental overdose of iron-containing products is a leading cause of fatal poisoning in children under 6. Keep this product out of reach of children. In case of accidental overdose, call a doctor or poison control center immediately.

Keep out of reach of children.

General Statements

We guarantee our supplements for potency and purity

Green super food

Our tablets are 100% organic without herbicides, pesticides, fertilizers or preservatives and tests negative for BMAA.

Typical Analysis: (Each serving may typically provide the following naturally occurring nutrients) Calories 10 Calories from Fat 1 Protein 2 g 4% Vitamin A (as beta-carotene) 6900 IU 138% Vitamin K 28 mcg 35% Riboflavin 0.2 mg 10% Niacin 0.5 mg 2% Vitamin B6 0.03 mg 2% Vitamin B12 6 mcg 100% Iron 1 mg 6% Phosphorus 24 mg 2% Iodine 6 mcg Magnesium 6 mg 2% Manganese 0.06 mg 4% Chromium 4.5 mcg 4% Sodium 25 mg 1% Potassium 30 mg <1% C-Phycocyanin 480 mg * Chlorophyll 42 mg * Gamma Linolenic Acid (GLA) 23 mg * Zeaxanthin 2 mg * Inositol 2 mg * ** Typical analysis due to seasonal variations

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.

Brand IP Statement(s)

Ultimate Organics

FDA Statement of Identity

Dietary Supplement

Seals/Symbols

USDA Organic

Double Verified Gluten Free

Quality Assurance International Certified Organic

Suggested/Recommended/Usage/Directions

Suggested Use: Take 6 tablets daily with food.

Formula

Spirulina provides a vegetarian source of complete protein. Spirulina platensis contains an exceptionally high amount of C-phycocyanin, a type of algae renowned for its health benefits.

General

VVL 141-100S

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

See for yourself

100% Organic Spirulina 500 mg by Vitamer Laboratories label

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

100% Organic Spirulina 500 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 100% Organic Spirulina 500 mg by Vitamer Laboratories

This is the 1 active ingredient this product is made of. Select it to open its full monograph.

Serving size6 Tablet(s) Dosage formTablet Or Pill Servings per container17 Amounts shown are per serving.

Organic Spirulina

Interacts with
327 drugs
3 Gram(s) per serving

Blue-green algae are nutrient-rich aquatic microorganisms (such as spirulina and Klamath Lake algae) taken as a supplement for energy, nutrition, and...

Organic Spirulina monograph & interactions

Other (inactive) ingredients: None. These complete the product’s ingredient list but are not active constituents.

Interaction report

100% Organic Spirulina 500 mg by Vitamer Laboratories Drug Interactions

Want to check YOUR meds against 100% Organic Spirulina 500 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
327Drugs
327 Moderate

Ingredients driving the most interactions

organic Spirulina 327

Individual Drug Interactions

The ingredients in 100% Organic Spirulina 500 mg interact with 327 drugs. Click any drug to see the details.

1 of the 1 ingredient in 100% Organic Spirulina 500 mg interact with drugs. Each result below shows which ingredient is responsible. organic Spirulina

Each ingredient & the kinds of drugs it affects

For each ingredient in 100% Organic Spirulina 500 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.

organic Spirulina3 drug types · 327 drugs

Anticoagulant/Antiplatelet Drugs

Theoretically, spirulina blue-green algae might increase the risk of bleeding if used with other anticoagulant or antiplatelet drugs. However, this is unlikely.
Spirulina blue-green algae have shown antiplatelet and anticoagulant effects in vitro. However, one preliminary study in 24 patients receiving spirulina blue-green algae 2.3 grams daily for 2 weeks showed no effect on platelet activation or measures of clotting time.

Likelihood Unlikely Evidence D
Antidiabetes Drugs

Theoretically, taking blue-green algae with antidiabetes drugs might increase the risk of hypoglycemia.
Human research shows that spirulina blue-green algae can have hypoglycemic effects in patients with diabetes, at least some of whom were using antidiabetes drugs. However, blue-green algae does not seem to improve glycated hemoglobin (HbA1c) levels in patients with diabetes. A meta-analysis of animal studies also suggests that spirulina blue-green algae have hypoglycemic effects.

Likelihood Possible Evidence B
Immunosuppressants

Theoretically, concurrent use of blue-green algae might interfere with immunosuppressive therapy.
Blue-green algae have been shown to stimulate the immune system.

Likelihood Possible Evidence D
organic Spirulina full monograph & interactions
The maker

Brand information

Manufacturer and brand details for 100% Organic Spirulina 500 mg, from the product label.

Vitamer Laboratories

See all Vitamer Laboratories products
Phone Number
1-888-710-0006
Pharmacist Counseling Corner

100% Organic Spirulina 500 mg by Vitamer Laboratories: Common Questions

Does 100% Organic Spirulina 500 mg by Vitamer Laboratories interact with any medications?
Yes. Based on its ingredients, 100% Organic Spirulina 500 mg has a known interaction with 327 medications. Use the checker to see how it interacts with a specific drug.
How can one product interact with so many drugs?
100% Organic Spirulina 500 mg contains a single active ingredient, and that one ingredient can interact with many different medications on its own. We check it against each medication and show the mechanism 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.
Does spirulina actually lower blood sugar?
Yes, research shows spirulina can have blood sugar-lowering effects in people with diabetes. That's why it matters if you're on diabetes medications — combining them could push your blood sugar too low. Your doctor or pharmacist can help you monitor this safely.
What are the most common side effects?
Stomach complaints — bloating, gas, diarrhea, nausea — are the most often reported. Headache, dizziness, and fatigue happen too. Most people tolerate it, but if you have a sensitive stomach, start low and go slow.
Can I take this if I'm pregnant or breastfeeding?
The safety data on file doesn't cover pregnancy or breastfeeding. There isn't enough information to say either way. Talk with your doctor or pharmacist for personalized advice before taking it.
Is this product contaminated with heavy metals?
That depends on the batch and the manufacturer. Quality and purity vary between products and some spirulina supplements have been found to contain toxins or heavy metals. Ask the seller whether this specific product has been tested by a third party for contaminants.
Can spirulina cause an allergic reaction?
Yes, though it's rare. Most allergic reactions are mild — rashes and itching. One severe case of anaphylaxis (a life-threatening reaction) was reported in a teenager. If you've had allergies to algae or seaweed, be cautious and talk to your pharmacist first.

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

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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.

100% Organic Spirulina 500 mg label
Go deeper

The Full Monographs Behind 100% Organic Spirulina 500 mg’s Ingredients

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

Herb & supplement monograph

Blue-green Algae

Interacts with 327 drugs

Blue-green algae are nutrient-rich aquatic microorganisms (such as spirulina and Klamath Lake algae) taken as a supplement for energy, nutrition, and general wellness. Evidence for most heal...

Read the full Blue-green Algae monograph →
Sources

Sources & How We Checked

100% Organic Spirulina 500 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 22 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.

Blue-green Algae 22 references
  1. Jensen GS, Ginsberg DJ, Huerta P, et al. Consumption of Aphanizomenon flos-aquae has rapid effects on the circulation and function of immune cells in humans. A novel approach to nutritional mobilization of the immune system. JANA 2000;2:50-6.
  2. Iwasa M, Yamamoto M, Tanaka Y, et al. Spirulina-associated hepatotoxicity. Am J Gastroenterol 2002;97:3212-13. PubMed
  3. Hayashi O, Katoh T, Okuwaki Y. Enhancement of antibody production in mice by dietary Spirulina platensis. J Nutr Sci Vitaminol (Tokyo) 1994;40:431-41.. PubMed
  4. Vitale S, Miller NR, Mejico LJ, et al. A randomized, placebo-controlled, crossover clinical trial of super blue-green algae in patients with essential blepharospasm or Meige syndrome. Am J Ophthalmol 2004;138:18-32. PubMed
  5. Mani UV, Desai S, Iyer U. Studies on the long-term effect of spirulina supplementation on serum lipid profile and glycated proteins in NIDDM patients. J Nutraceut 2000;2(3):25-32. DOI
  6. Chiu HF, Yang SP, Kuo YL, et al. Mechanisms involved in the antiplatelet effect of C-phycocyanin. Br J Nutr 2006;95:435-40. PubMed
  7. Hsiao G, Chou PH, Shen MY, et al. C-phycocyanin, a very potent and novel platelet aggregation inhibitor from Spirulina platensis. J Agric Food Chem 2005;53:7734-40.
  8. Katz M, Levine AA, Kol-Degani H, Kav-Venaki L. A compound herbal preparation (CHP) in the treatment of children with ADHD: a randomized controlled trial. J Atten Disord 2010;14:281-91. PubMed
  9. Madhyastha, H. K., Radha, K. S., Sugiki, M., Omura, S., and Maruyama, M. Purification of c-phycocyanin from Spirulina fusiformis and its effect on the induction of urokinase-type plasminogen activator from calf pulmonary endothelial cells. Phytomedicine PubMed
  10. Mazokopakis, E. E., Karefilakis, C. M., Tsartsalis, A. N., Milkas, A. N., and Ganotakis, E. S. Acute rhabdomyolysis caused by Spirulina (Arthrospira platensis). Phytomedicine. 2008;15(6-7):525-527. PubMed
  11. Halidou, Doudou M., Degbey, H., Daouda, H., Leveque, A., Donnen, P., Hennart, P., and Dramaix-Wilmet, M. [The effect of spiruline during nutritional rehabilitation: systematic review]. Rev.Epidemiol.Sante Publique 2008;56(6):425-431.
  12. Konno, T., Umeda, Y., Umeda, M., Kawachi, I., Oyake, M., and Fujita, N. [A case of inflammatory myopathy with widely skin rash following use of supplements containing Spirulina]. Rinsho Shinkeigaku 2011;51(5):330-333. PubMed
  13. Le TM, Knulst AC, Röckmann H. Anaphylaxis to Spirulina confirmed by skin prick test with ingredients of Spirulina tablets. Food Chem Toxicol 2014;74:309-10. PubMed
  14. Rzymski P, Niedzielski P, Kaczmarek N, Jurczak T, Klimaszyk P. The multidisciplinary approach to safety and toxicity assessment of microalgae-based food supplements following clinical cases of poisoning. Harmful Algae 2015;46:34-42. DOI
  15. Petrus M, Culerrier R, Campistron M, et al. First case report of anaphylaxis to spirulin: identification of phycocyanin as responsible allergen. Allergy 2010;65(7):924-5. PubMed
  16. Marles RJ, Barrett ML, Barnes J, et al. United States Pharmacopeia safety evaluation of spirulina. Crit Rev Food Sci Nutr 2011;51(7):593-604. PubMed
  17. Majdoub H, Ben Mansour M, Chaubet F, et al. Anticoagulant activity of a sulfated polysaccharide from the green alga Arthrospira platensis. Biochim Biophys Acta 2009;1790(10):1377-81. PubMed
  18. Cha BG, Kwak HW, Park AR, et al. Structural characteristics and biological performance of silk fibroin nanofiber containing microalgae spirulina extract. Biopolymers 2014;101(4):307-18. PubMed
  19. Jensen GS, Drapeau C, Lenninger M, Benson KF. Clinical safety of a high dose of phycocyanin-enriched aqueous extract from Arthrospira (Spirulina) platensis: results from a randomized, double-Blind, placebo-controlled study with a focus on anticoagulant ac
  20. Hamedifard Z, Milajerdi A, Reiner Z, Taghizadeh M, Kolahdooz F, Asemi Z. The effects of spirulina on glycemic control and serum lipoproteins in patients with metabolic syndrome and related disorders: A systematic review and meta-analysis of randomized con
  21. Moradi S, Zobeiri M, Feizi A, Clark CCT, Entezari MH. The effects of spirulina (Arthrospira platensis) supplementation on anthropometric indices, blood pressure, sleep quality, mental health, fatigue status and quality of life in patients with ulcerative
  22. Ghanbari F, Amerizadeh A, Behshood P, Moradi S, Asgary S. Effect of microalgae arthrospira on biomarkers of glycemic control and glucose metabolism: a systematic Review and meta-analysis. Curr Probl Cardiol 2022;47(10):100942. PubMed

See these in context on the Blue-green Algae 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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