Can peptides cause thyroid problems or interact with thyroid medications?

Some peptides like CJC-1295 may slightly affect thyroid function. If you're on levothyroxine or other thyroid medications, monitor TSH levels every 8-12 weeks initially. Weight changes from GLP-1 peptides can also necessitate thyroid dose adjustments. <a href='https://www.thyroid.org/thyroid-function-tests/' target='_blank'>American Thyroid Association</a>