kelp
Kelp is a generic term, like the word "meat". The word "kelp" can refer to many different sea weeds such as the brown type, green type, carrageenan, or even red "irish moss" type, in addition to others ! Additionally, this article shows a dictionary definition that also shows that ashes of (burned) aquatic plants can sometimes be called kelp:
http://www.answers.com/topic/kelp
So, one could obtain and dry any one of various aquatic plants, put it in a bottle, and legally call it Kelp.
This in fact occurs, and undoubtedly explains why people report different results when disucssing kelp, because what is labeled as "Kelp" on one bottle in one store, is not the same as what is contained in a bottle labelled "Kelp" in a different bottle in a different store. Even though they both say "Kelp", their contents are differnt. This is easily verified by comparing the
Iodine content listed on the bottles.
This is why I prefer
Lugol's solution and Iodoral tablets. I know exactly how much
Iodine is in each, and can take advantage of this knowledge when exerting control over what I'm ingesting. If using stuff that is labeled as "Kelp" from a bottle in a store, one introduces additional uncertainty, needlessly.
There are other nutrients in kelp, that aren't present in Iodoral or
Lugol's solution also. I'm not knocking kelp, but rather pointing out that kelp does not give the control that some may desire, due to variances. Additionally, to obtain 12 mg of iodine, one needs to eat lots of kelp.