PureSea® Natural Iodine vs Synthetic for more Sustainable Release

Understanding the different sources of iodine is key to reaping its nutritional benefits. Iodine is an essential nutrient in the diet, and one that is increasingly lacking globally. A report from the Iodine Global Network cites an EU funded project that concludes “Europe is an iodine deficient continent”.1

PureSea® gold-standard seaweed, offered through LEHVOSS Nutrition, is an ideal natural source of iodine and provides numerous approved health claims linked to the source of essential iodine. Independent clinical trials have shown that synthetic potassium iodide releases iodine into the system quickly, resulting in a spike in iodine levels. By contrast, natural foods like seaweed have iodine bound into fibres, allowing it to be broken down and released more slowly. It is believed that, a more consistent, sustained release of iodine is beneficial as it allows your body to absorb and utilise the iodine more efficiently.

Research from Glasgow University Medical School demonstrates this by comparing Potassium Iodide to PureSea® seaweed species.2

Figure 1: The differing excretion rates of PureSea® compared to synthetic Potassium Iodide

 PureSea Natural Iodine Chart 2

There are more than 10,000 types of seaweed globally, the iodine levels of which will vary to a large extent. Therefore, knowing the source and the specific species of the seaweed is important. PureSea® is uniquely DNA authenticated and traceable, with every batch measured for iodine levels - evidencing safe and consistent results over many years of production.

To learn more about PureSea® visit our dedicated page or contact us.


1) The Euthyroid Consortium (2018) The Krakow Declaration on Iodine: Tasks and responsibilities for prevention programs targeting iodine deficiency disorders. European Thyroid Journal. https://www.iodinedeclaration.eu/wp-content/uploads/2018/04/Krakow-Declaration-2018_03_29.pdf

2) Combet, E., Ma, Z.F., Cousins, F., Thompson, B. and Lean, M.E.J. (2014) Low-level seaweed supplementation improves iodine status in iodine-insufficient women. British Journal of Nutrition. https://pubmed.ncbi.nlm.nih.gov/25006699/