First, if you have proven deficiency under NHS care and want a private top-up injection between NHS doses because your symptoms return early, we will do that on agreed protocol after seeing your blood results
You probably only had the TSH tested when the FT4 FT3 and Anti-TPO and Anti-Tg are also needed for a diagnosis
Both bacteriostatic water and sterile water are not used for straight injections, they have to be diluted with a drug or solvent
Topical Peptides: Comparing Side Effects When administering peptides, the choice between injectable and topical forms can significantly impact results and safety
doi:10.4021/JEM.V3I1-2.157 Heffernan M, Summers RJ, Thorburn A, et al
As a diluent, saline is sometimes chosen over bacteriostatic water for peptides or compounds that are sensitive to preservatives, since the benzyl alcohol in bacteriostatic water can affect the stability of certain substances