Skip to main content

Lot-to-Lot Consistency

Meaning

Lot-to-lot consistency is a critical quality assurance standard in the manufacturing of pharmaceuticals, peptides, and dietary supplements, referring to the absolute assurance that every distinct batch, or lot, of a product maintains the same predetermined chemical composition, potency, and purity profile. This rigorous standard ensures that a patient receives a product with identical biological activity and dosage with each successive refill, which is non-negotiable for effective, predictable, and safe outcomes in hormonal or peptide therapy. Deviations in consistency can introduce significant clinical variability.