Heavy metals levels in seaweed can really vary from batch to batch. (wellnessmama.com)
Additionally, it shows your mineral levels and toxic heavy metal levels — or at least which are being currently dumped, or eliminated, into the hair. (myersdetox.com)
The best way to know for sure is to purchase your seaweed from companies that regularly third - party lab test their products for heavy metal levels. (wellnessmama.com)