Patent ID: 6908632

Claim:
A method of making a Loquat extract having a standardized corosolic acid concentration of about 7% w/w comprising: a) providing a mixture of small pieces of a Loquat source material in an 80% aqueous ethanol solution at about a 1:1 wt./vol. ratio; b) soaking the small Loquat leaf pieces in the ethanol solution at a temperature of from about 90° C. for about 2 hours, to create an extract solution; c) filtering the extract solution and collecting the filtrate and reclaiming the small Loquat material; d) soaking the reclaimed small Loquat material pieces in an aqueous ethanol solution at about a 1:1 wt./vol. ratio and at a temperature of about 90° C. for about 1 hour, to create a second extract solution; e) filtering the second extract solution and collecting the filtrate; f) combining the filtrates into a single filtrate; and g) concentrating the filtrate, thereby providing a Loquat extract containing a standardized corosolic acid concentration of about 7% w/w.