Thyroid problems may result from either an overactive or an underactive thyroid gland. Kelp, a type of seaweed, may be beneficial in treating an underactive thyroid in specific cases, but it may be detrimental for people who are suffering from an overactive thyroid. See your doctor if you think you have an underactive thyroid, and use kelp tablets only under a doctor's supervision. The Food and Drug Administration does not oversee the production of herbal supplements, and kelp may contain contaminants.
Kelp
Kelp, or Fucus vesiculosus, contains high levels of iodine, in addition to a variety of nutrients, including essential fatty acids, vitamins C, D, E and B-complex, protein, calcium iron, potassium, zinc and other minerals. Kelp, in tablet form, is available from health food stores, but it is also available as a bulk powder or in capsules and tinctures. Kelp may be sold as bladderwrack.
Potential Benefits
In cases where hypothyroidism, or underactive thyroid, is the result of a severe iodine deficiency, kelp tablets may be of benefit, according to Mayo Clinic physician Todd B. Nippoldt. However, if the cause of hypothyroidism is not from an iodine deficiency, kelp tables will not help.
Dosage and Method
There is no standard recommended dose of kelp tablets for treating hypothyroidism, but the "Gale Encyclopedia of Alternative Medicine," offers a general suggested dosage for adults of 10 mg to 15 mg of kelp per day. Follow dosage instructions on the product label, or consult your doctor for specific dosage advice.
Considerations
The high amounts of iodine in kelp may exacerbate the symptoms of an overactive thyroid, or hypothyroidism, according to Medline Plus, a division of the National Institutes of Health. Kelp may contain toxic heavy metals if it is harvested from contaminated seawaters. Potential side effects include female infertility, an allergic reaction to iodine and reduced blood-clotting ability. There may be additional side effects yet unknown. Kelp tablets may interfere with medications and other supplements, including drugs used to treat thyroid conditions, anti-coagulants, ginger, red clover and other herbs. Because of the risk of side effects, take kelp tables only under a doctor's supervision.
References
- "Gale Encyclopedia of Alternative Medicine"; Jacqueline L. Longe; 2005
- MayoClinic.com: Can Iodine Supplements Help Regulate Thyroid Function in a Person with Hypothyroidism?
- Medline Plus: Bladderwrack
