Fucus vesiculosis Common name: Bladderwrack, Kelp
Family: Fucaceae
Part used: Whole plant
Constituents: Phenolic compounds (algin, mucopolysaccharides); trace minerals (iodine up to 0.1%)
Actions: Source of iodine (anti-hypothyroid), nutritive, and anti-rheumatic
Medical uses: Hypothyroid (due to iodine deficiency), goiter, obesity, rheumatism (externally)
Pharmacology: iodine content promotes T3 & T4 production
Pharmacy:
- Tincture: (1:5, 45%), 2-6 mL TID
- Dried Herb: 0.8-2g QD
- Fresh kelp as food
Contraindications: Pregnancy, lactation, GI bleeding, excess thyroid activity
Toxicity: None known.
The Naturopathic Herbalist 
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