Herbs Hub
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Wakame

Undaria pinnatifida

Sea Moss & Algae. Modern nutrition.

Also called Japanese kelp, Sea mustard

Pinyin: Qún Dài Cài

Spanish: Alga wakame

Iodine varies; thyroid caution

A mild, leafy seaweed used in miso soup and salads, rich in fucoxanthin (a yellow-brown plant pigment).

Did you know? Wakame is considered an invasive species in parts of Europe, Australia and the United States, where it can crowd out native seaweeds.

What it may help, and how strong the proof is

  • Weight. Fucoxanthin, a pigment in wakame, reduced body fat in some animal studies. Human results are few and small.
    Traditional proof
  • Inflammation. Lab studies show anti-inflammatory activity. Human evidence is lacking.
    Traditional proof

Parts of the body

Energy & metabolism, Immune system, Joints

Traditional use

Japanese and Korean cooks have eaten wakame for centuries, most often in miso soup. Its use as a medicine is limited.

How it is classified

Herbal actions
Nutritive, Antioxidant. Energy: neutral.

How people take it

Eaten in soups, salads and side dishes. Supplements are uncommon.

Food.

Where to get it

Grows on cold coastal rocks in Japan, Korea, China and parts of Europe. Sold fresh, dried, salted or frozen. Much of it is farm-grown.

Be careful

Safe as food for most people. It is high in iodine, so people with thyroid disease should be careful. Salted products add a lot of sodium.

Avoid if: thyroid disease.

Mixing with other things

  • Works well together

    Both are used in Japanese broths and miso soup.

  • Use caution
    Thyroid medicine (levothyroxine (Synthroid))

    Iodine can change how thyroid medicine works and shift thyroid levels.

Adds up with others that carry iodine: , , , , , .

The honest take

Wakame is a healthy, mild food with modest nutrients. Its weight and inflammation claims come mostly from lab and animal studies. Its iodine content is a reason for care if you have thyroid problems.