Ingredient Library

Bladderwrack

Discover why bladderwrack has been used for centuries and why its naturally occurring iodine makes it a popular ingredient in thyroid support supplements.

Bladderwrack (Fucus vesiculosus) is a brown seaweed that grows along rocky coastlines throughout the North Atlantic. Traditionally consumed as both a food and botanical ingredient, it is naturally rich in iodine, minerals and beneficial plant compounds.

Because of its naturally occurring iodine content, bladderwrack has become a popular ingredient in nutritional supplements designed to support normal thyroid function and healthy metabolism.

What is Bladderwrack?

Bladderwrack is a species of brown seaweed recognised by the small air-filled bladders that help it float in seawater. It naturally absorbs minerals from the ocean, making it a rich source of iodine and other trace minerals.

Bladderwrack & Iodine

Iodine is an essential mineral that contributes to the normal production of thyroid hormones. Bladderwrack is naturally one of the richest whole-food sources of iodine, making it a popular botanical ingredient in thyroid support formulations.

Supporting Normal Thyroid Function

The thyroid gland requires iodine to produce the hormones thyroxine (T4) and triiodothyronine (T3), which help regulate metabolism, energy production and many other normal physiological processes. Bladderwrack has been traditionally used for centuries because of its naturally high iodine content.

Hormonal Balance

Supports normal hormonal health and wellbeing.

Energy Production

Supports normal energy-yielding metabolism and helps reduce tiredness and fatigue.

Brain Function

Supports normal cognitive function, memory and mental performance.

Healthy Inflammatory Response

Supports the body's normal inflammatory response.

What is bladderwrack?

Bladderwrack is a brown seaweed (Fucus vesiculosus) that grows along the coasts of the Atlantic Ocean. It has been traditionally consumed for centuries and is naturally rich in iodine and trace minerals.

Why is bladderwrack rich in iodine?

Like other seaweeds, bladderwrack absorbs minerals directly from seawater as it grows. This allows it to naturally accumulate iodine, making it one of the richest natural dietary sources of this essential mineral.

How does iodine support the thyroid?

Iodine contributes to the normal production of thyroid hormones, which help regulate metabolism, energy production, growth and normal nervous system function. Maintaining an adequate iodine intake is essential for healthy thyroid function.

What is the difference between bladderwrack and kelp?

Both bladderwrack and kelp are brown seaweeds that naturally contain iodine, but they are different species. Bladderwrack (Fucus vesiculosus) is recognised by its distinctive air-filled bladders, while kelp generally refers to larger seaweeds from the Laminaria family. Both are commonly used in thyroid support supplements because of their naturally occurring iodine content.

Can you consume too much iodine?

Yes. Although iodine is essential, consuming excessive amounts over long periods is not recommended. Seaweed supplements should always be taken according to the recommended serving size, as iodine levels can naturally vary between species.