Re: Kelp/ arsenic poisoning/ contaminants

Is the kelp most people take the dried material? Or fresh as in sushi?

I sometimes wonder about the dried stuff because of chemicals that might be used in the drying process. For example, sulphur dioxide is used to prepare some dried fruits and root vegetables (apricots and ginger root). I don't know how kelp is processed.

I wonder if contaminants could be introduced in the drying process.

Another example is hydrogenated foods. They use certain minerals in the hydrogenation process, which are then [supposedly] removed in a post-processing step.