L-LEUCINE PF (SA) is a high purity amino acid used as an excipient in pharmaceutical formulations. L-LEUCINE PF (SA) provides over 98.5% purity and meets stringent limits for related substances and impurities as specified in pharmacopeial monographs. As an excipient, L-LEUCINE PF (SA) helps enhance solubility, stability and bioavailability of drug molecules without interfering with the therapeutic action. Its defined crystalline structure and defined impurity profile make L-LEUCINE PF (SA) well suited for use in pharmaceutical dosage forms where high purity is required to ensure patient safety, consistency and therapeutic efficacy.