* Kelp contains a large amount of [[iodine]], which can cause side effects. Although some iodine is essential for thyroid function, ingesting too much of it can negatively affect thyroid function, causing hypo- or hyper-thyroidism. Many thyroid specialists suggest that adults consume about 150 micrograms of iodine daily, although that is well below the level that could cause side effects. Table salt is iodized, so you should balance your kelp consumption against your salt intake.
* Kelp might also contain arsenic, and consuming large amounts of kelp supplements might lead to arsenic poisoning.
* See side effects [[Kombu]]
==Health Benefits and uses of Kelp are==