503A and 503B facilities compounding peptide therapies for US clinics and patients.
503A pharmacies compound individual prescriptions under state oversight (USP <797>). 503B outsourcing facilities produce batch quantities for office use under FDA oversight and cGMP standards. The key difference for clinics: 503B products can be stocked without patient-specific prescriptions at the time of ordering.
Full 503A vs 503B comparison →
Largest US compounder. Deep peptide catalog, nationwide shipping, comprehensive compliance docs. Premium pricing reflects regulatory infrastructure.
Strong in integrative medicine. Peptide + HRT focus. Known for practitioner education and clinical support resources.
Serves anti-aging clinics and telehealth platforms. Competitive turnaround. Expanding peptide catalog post-reclassification.
Peptide specialist. Loyal regen med clinic base. Hands-on customer service and formulation guidance.
API sourcing documentation and COAs? FDA warning letters or state actions? Sterile compounding certs? Beyond-use dating methodology? 503B office-use availability?