Bladderwrack (Fucus Vesiculosus)

Bladderwrack Benefits

Bladderwrack is a form of kelp that has been used medicinally for centuries. The main use of the herb has been for the stimulation of the thyroid gland as a treatment for obesity and cellulite. The high iodine content of the herb stimulates thyroid function which boosts metabolism.

It has a reputation in the relief of rheumatism and rheumatoid arthritis and may be used both internally and as an external application for inflamed joints. The main phytotherapeutic use of Fucus is during debility and convalescence, and also to remineralise the body.

Fucus also appears to assist in the problem of lipid balance associated with obesity, and where obesity is associated with thyroid dysfunction, this herb may help to reduce excess weight.

Bladderwrack is rich in iodine, calcium, magnesium, potassium, sodium, sulfur, silicon and iron and high in some B-complex vitamins. It contains moderate amounts of phosphorus, selenium, manganese and zinc and small amounts of vitamins A, C, E and G. It also contains anti-sterility vitamin S as well as vitamin K. It is rich in algin and mannitol, carotene and zeaxantin with traces of bromine.

Bladderwrack Herb Notes / Side Effects

Latin Name

Fucus vesiculosis

Common Name


Suggested Properties

Nourishing and soothing, stimulates the thyroid gland, anti-hypothyroid, thyroactive, anti-obesic, antirheumatic, demulcent, gentle metabolic stimulant, nutritive, adaptagen, thyroid tonic, anti-inflammatory


A nourishing tonic. Obesity with tiredness and dry skin. Cellulite, chronic dry skin and stubborn constipation. Regular use delays the progress of arthritis and hardening of the arteries. A good tonic for old age. For children with slow mental and physical development.

Indicated for

Myxoedema, lymphadenoid goitre, obesity, rheumatism, rheumatoid arthritis.

Because of the high iodine content bladderwrack should be used according to the directions and anyone with thyroid problems should consult their doctor. Start with 1 to 2 capsules per day.

Avoid in overactive thyroid conditions such as hyperthyroidism or cardiac problems and/or during pregnancy and breast-feeding. Not recommended for children under 5.

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Charlotte Clayton 's avatar  Charlotte Clayton 17/03/2014 19:41

Will Bladderwrack affect the contraceptive implant?

Gizzmoe 's avatar  Gizzmoe 25/05/2011 03:39

Is it better to take the pills or powder form?

3 people liked this.
Colouracademy 's avatar  Colouracademy 01/04/2011 20:51

Just started taking Bladderwrack and the bloated feeling that I had has gone ! Weight is dropping and feel that I have more energy . Jenny

3 people liked this.
Jill 's avatar  Jill 11/09/2013 22:58

I started Bladderwrack a week ago after reading "Eat Right For Your Blood Type" and being Type O they suggested Bladderwrack as a useful herb for thyroid problems. The bloated feeling I was accustomed to is gone and my energy has improved. I do have a sluggish thyroid and hope that is helps. My weight gain has slowed but will continue to monitor my progress.

1 person liked this.
HELPING OUT 's avatar  HELPING OUT 19/11/2012 22:35

for comments about bladderwrack not working,,,FYI!!! Those that are not O (+) or (-) blood type it is not beneficial for weight loss...get the book "EAT RIGHT FOR YOUR BLOOD TYPE" BY DR. PETE J. D'ADAMO...Extremely interesting and if you know your blood type you will relate to it... go to pg 90, herb recommended for O plan, look at last sentence under BLADDERWRACK. (NOTE***HOWEVER, THAT ALTHOUGH BLADDERWRACK HAS A TIME -HONORED REPUTATION AS AN AID IN WEIGHT LOSS FOR TYPE 0'S, IT DOES NOT WORK THAT WAY FOR OTHER BLOOD TYPES.)....... MEANING IF YOU ARE NOT O BLOOD TYPE.... IF YOU FALL INTO CATEGORY A, AB. OR B... DO NOT TAKE IT WILL NOT BENEFIT YOU... PLEASE RESEARCH BEFORE TAKING HERBS ETC... KNOW YOUR FACTS... GOOD LUCK :)

1 person liked this.
Elliemayday 's avatar  Elliemayday 07/10/2012 12:58

Started taking Bladderwrack tablets about six weeks ago, I have lost 9lb in weight in that time. I am a little concerned because I take 80mg Beta Blocker and a mild diueretic, is it safe to continue taking them? Definitely stops me bloating and helps with my IBS and my back pain seems to be alleviated as well, more energy too. Would be grateful if anyone could help with the Beta Blocker question.

2 people liked this.
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