This is because they're the exact same chemical structure as our naturally occurring thyroid hormones. (wellnessmama.com)
Chemicalized nutrition may not have the exact same chemical structure which means it may have to be used differently or it may not be absorbed at all depending on how the body «interprets» the shape. (wellnessmama.com)
Bioidentical is a term which is defined as having the exact same chemical structure as hormones found naturally in the human body. (bioidenticalhormones101.com)