Um, yes. Table salt is probably 50% sodium, too. Do you know what happens when you take elemental sodium?
An iodine salt is not the same as elemental iodine. You can take a much higher dose of iodine in the form of potassium iodine than you can in the form of elemental iodine.
Go to ki4u.com, check the tables for the amount of iodine you need to ingest on a daily basis to keep your thyroid saturated, then check how many kelp tablets you'd need to take to provide that amount. I'm not making this stuff up.
Potassium Iodide (KI) tablets (65 mg each, about 50 mg Iodine) 200 tablets to a bottle. (2 tablets is an adult daily dose.) Suggested Retail: $19.95 per bottle (not incl s/h)
Solgar - cat# - SLGR-3956 - KELP 520 MG VEGICAPS - 250 COUNT - SRP - $14.80 - Total Health Price - $11.10