Duckweed

Last Editorial Review: 6/11/2021
Other Name(s):

Grains de Grenouille, Herbe aux Canards, Lemna minor, Lenteja de Agua, Lenticule Mineure, Lentille d'Eau, Merde de Grenouille, Petite Lentille d'Eau, Ranouillie.

Overview

Duckweed is an herb. The whole fresh plant is used to make medicine.

People take duckweed for swelling (inflammation) of the upper airways, yellowed skin due to liver problems (jaundice), and arthritis.

How does it work?

There isn't enough information available to know how duckweed might work as a medicine.

QUESTION

Next to red peppers, you can get the most vitamin C from ________________. See Answer

Uses & Effectiveness

Insufficient Evidence to Rate Effectiveness for...

  • Swelling (inflammation) of the upper airways.
  • Yellowed skin (jaundice).
  • Arthritis.
  • Other conditions.
More evidence is needed to rate the effectiveness of duckweed for these uses.

Natural Medicines Comprehensive Database rates effectiveness based on scientific evidence according to the following scale: Effective, Likely Effective, Possibly Effective, Possibly Ineffective, Likely Ineffective, and Insufficient Evidence to Rate (detailed description of each of the ratings).

Side Effects

There isn't enough information available to know if duckweed is safe or what the possible side effects might be.

SLIDESHOW

Vitamin D Deficiency: How Much Vitamin D Is Enough? See Slideshow

Special Precautions & Warnings

Pregnancy and breast-feeding: Not enough is known about the use of duckweed during pregnancy and breast-feeding. Stay on the safe side and avoid use.

Dosing

The appropriate dose of duckweed depends on several factors such as the user's age, health, and several other conditions. At this time there is not enough scientific information to determine an appropriate range of doses for duckweed. Keep in mind that natural products are not always necessarily safe and dosages can be important. Be sure to follow relevant directions on product labels and consult your pharmacist or physician or other healthcare professional before using.

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Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

References

Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.