There are twenty or so FDA approved bioidentical hormone preparations widely available at corner drug stores. (bioidenticalhormones101.com)
Sterile testosterone injectables require an incredible amount of oversight and testing to produce, as do all other FDA - approved hormone preparations. (tctmed.com)
You may want to read about the different hormone preparations in my article Which Thyroid Medications Is Best? (thyroidpharmacist.com)