If you have Hashimoto's thyroiditis, you may be at greater risk for vitamin deficiencies, so it is essential to have a complete workup and regular blood tests periodically
For more on how long reconstituted peptides last in the fridge across different types, and details on peptide expiration in general , these resources cover stability science in depth
For long-term stability, refrigerate between 28C and avoid excessive moisture or direct sunlight
Howe AS, Vasudevan V, Kongnyuy M, Rychik K, Thomas LA, Matuskova M, Friedman SC, Gitlin JS, Reda EF, Palmer LS (2017) Degree of twisting and duration of symptoms are prognostic factors of testis salvage during episodes of testicular torsion