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Other toxins like heavy metals, such as mercury from dental fillings, can impair conversion of T4 to T3. 22 High exposure to these toxins, coupled with impaired detoxification due to poor diet, nutrient depletion from chronic stress, and genetic factors, may give them the opportunity to disrupt thyroid function

Higher-end formulations sometimes cite 4-5%, but irritation reports rise with concentration

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The material here is a research-grade lyophilized peptide vial documented for in vitro laboratory work, with no patient-directed preparation, prescription pathway, or dispensing framework attached