No known drug interactions for the matched ingredients — not a guarantee none exist. Check your meds →
Dietary supplement

Duckweed Ingredients & Drug Interactions

by Hawaii Pharm

Duckweed label
See full label image
Liquid Category: Botanical
No known interaction
Clinical methodology reviewed by · Updated Sep 9, 2026 · Label data from the NIH DSLD
What is this page for?

First and foremost: checking Duckweed 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 No known interaction

Duckweed is a dietary supplement by Hawaii Pharm with 1 active ingredient. Its ingredients are commonly taken for plant-based protein source, source of vitamins and minerals, traditional remedy for fever and inflammation.We don’t currently list a known drug interaction for its mapped ingredients — but that doesn’t guarantee none exist, so always confirm with your pharmacist.

Jump to a section

HelloPharmacist Scorecard of Duckweed by Hawaii Pharm

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 23, 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 one active ingredient: Duckweed Herb Extract, Dry. The liquid form also includes alcohol, water, and glycerin as inactive ingredients — the alcohol and glycerin help preserve and dissolve the extract.

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

This is a single-ingredient Duckweed product and its label doesn't state a use — see Duckweed's own graded uses on its monograph.

Why this rating?
  • We looked at the product name, claims, and label statements and couldn't find a stated purpose to grade.

The evidence on duckweed for respiratory tract infections, rheumatoid arthritis, and gout is insufficient to rate it — meaning we don't have enough reliable data to say whether it works for any of these uses. If you're considering it for one of these conditions, talk with your doctor about whether the current evidence supports a trial, or whether other options have stronger support.

The evidence, ingredient by ingredient Duckweed

How safe is it?

Some data gaps
Safety Information · database check
Some gaps

Safety data exists for these ingredients, but with some important gaps.

Why this rating?
  • We hold adverse-effect (side-effect) data for 0 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.

Duckweed is eaten as a food in some cultures, but the safety data here raises two concerns. The product itself may carry water contamination risks, and there isn't enough reliable safety information overall to recommend it.

Safety during breastfeeding hasn't been established, so if you're breastfeeding, the data advises against using it. No adverse effects from this ingredient were reported in trial data we hold.

Side effects, ingredient by ingredient Duckweed

Meds to double-check

No known interactions
Known Interaction Concern · database check
No known interactions

No medication interactions are currently documented for the matched ingredients — that isn't a guarantee none exist.

Why this rating?
  • None of the 1 matched ingredient has a documented medication interaction on file.

No interactions are documented in our data for the ingredients we checked. That said, always confirm with your own pharmacist or doctor before adding any new supplement to your routine.

The bottom line

Scorecard at a glanceFully disclosed formula with no assessable stated purpose. No medication interactions are currently documented, and some safety-information gaps remain.

Hawaii Pharm Duckweed is a single-ingredient extract with no documented drug interactions, but the safety evidence is weak and the effectiveness for its listed uses isn't established. Before you start it, especially if you're pregnant or breastfeeding, talk with your doctor or pharmacist about whether the evidence supports it for your situation.

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 Oct 24, 2023.

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 Duckweed, straight from the product label.

Brand Hawaii Pharm
Barcode (UPC) 840253619273
Net contents 4 Fluid Ounce(s); 120 mL
Market status On market
Date entered into DSLD Oct 24, 2023
DSLD ID 301536
Product type Botanical
Supplement form Liquid
Dietary claims / uses All Other, Structure/Function
Intended target group(s) Adult (18 - 50 Years), Gluten 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 Duckweed by Hawaii Pharm, 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:
0.7 mL
Maximum serving Sizes:
1 mL
Servings per container
120
UPC/BARCODE
840253619273
IngredientAmount% DV
Duckweed Herb Extract, Dry983 mg--

Other ingredients: Alcohol, Water, Glycerin

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.
Brand IP Statement(s)

Hawaii Pharm Herbal Extract Highest quality since 2008

Suggested/Recommended/Usage/Directions

Suggested use: Shake well before using. For adults add about 20-30 drops (0.7-1 mL, one full squeeze of the dropper bulb) to some juice or water, up to 4 times a day.

Precautions

Warning: We recommend to seek expert medical advice before taking.

Do not use if you are allergic to any ingredients.

Consult your physician before giving to children under 18, during pregnancy, if nursing or taking medications.

Consult your physician before giving to children under 18, during pregnancy, if nursing or taking medications.

May affect the ability to drive and operate machinery. May have contraindications, can cause side effects and adverse reactions. Do not use if seal is broken or missing.

Keep out of the reach of children!

Storage

Store in a cool dry place.

Seals/Symbols

cGMP Made in compliance with cGMP 21 CFR 111 in an FDA registered and inspected facility.

Organic Alcohol Based USA Made in United States of America

FDA Disclaimer Statement

This product has not been evaluated by the FDA and is not intended to diagnose, treat, cure or prevent any disease.

General Statements

Scan this QR-code to get 15% discount on your next purchase. Limited time deal.

Formula

Spirodela polyrhiza

Organic Alcohol Based

Formulation

Only natural ingredients Purity is laboratory tested and verified

All the raw materials are gluten-free by their nature No artificial colors, flavors, or preservatives

Not tested on animals

Organic Alcohol Based

Made in USA, Hawaii

FDA Statement of Identity

Herbal Supplement

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

See for yourself

Duckweed by Hawaii Pharm label

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

Duckweed 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 Duckweed by Hawaii Pharm

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

Serving size0.7 mL Dosage formLiquid Servings per container120 Amounts shown are per serving.

Duckweed Herb Extract, Dry

No known
interactions
983 mg per serving Form: Spirodela polyrhiza Herb Extract, Dry

Duckweed is a tiny floating water plant being studied as a nutrient-dense, plant-based protein and food source. Human evidence for any specific health...

Duckweed Herb Extract, Dry monograph & interactions

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

Interaction report

Duckweed by Hawaii Pharm Drug Interactions

We don’t currently list any known drug interactions for the mapped ingredients in Duckweed. This doesn’t guarantee none exist — always confirm with your pharmacist before combining a supplement with your medications.

The maker

Brand information

Manufacturer and brand details for Duckweed, from the product label.

Hawaii Pharm

See all Hawaii Pharm products
Name
Hawaii Pharm LLC
Street Address
510 Sumner St. Ste. 613
City
Honolulu
State
HI
ZipCode
96817
Phone Number
888-854-2924
Web Address
www.hawaiipharm.com
Pharmacist Counseling Corner

Duckweed by Hawaii Pharm: Common Questions

Does Duckweed by Hawaii Pharm interact with any medications?
We do not currently list a known interaction for the mapped ingredients in Duckweed. This does not guarantee none exist, so confirm with your pharmacist.
How can one product interact with so many drugs?
Duckweed 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.
Is it safe during pregnancy?
The safety data on file doesn't tell us whether duckweed is safe or unsafe in pregnancy — there simply isn't enough information. Talk with your doctor or pharmacist before taking it if you're pregnant, so you can make a choice based on your individual situation.
What about breastfeeding?
Safety during breastfeeding hasn't been established, so the data advises against using it while you're nursing. If you're breastfeeding and interested in this product, check with your doctor or pharmacist first.
Does duckweed actually work for respiratory infections or arthritis?
The evidence we hold rates it as insufficient to say — we don't have enough reliable data to confirm it works for respiratory tract infections, rheumatoid arthritis, or gout. If you're considering it for one of these, ask your doctor whether the current evidence supports it.
What are the side effects?
No adverse effects from duckweed were reported in the trial data we hold. That said, the general safety information available is limited, so watch for any unusual symptoms when you start it and report them to your pharmacist.
What's the concern about water contamination you mentioned?
Duckweed grows in water and can pick up contaminants from its environment. When it's harvested and processed into a supplement, quality control becomes important — not all products are created equal. It's one reason the safety data here emphasizes caution.

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

Not sure if Duckweed 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.

Duckweed label
Go deeper

The Full Monographs Behind Duckweed’s Ingredients

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

Herb & supplement monograph

Duckweed

Duckweed is a tiny floating water plant being studied as a nutrient-dense, plant-based protein and food source. Human evidence for any specific health benefit is very limited, and safety dep...

Read the full Duckweed monograph →
Sources

Sources & How We Checked

Duckweed'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 2 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.

Duckweed 2 references
  1. Dietary Supplements: What You Need to Know — NIH Office of Dietary Supplements Source
  2. Using Dietary Supplements Wisely — NIH NCCIH Source

See these in context on the Duckweed 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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