Inclusion Criteria:  Subjects between 50 and 80 years of age. English Speaking. ABI 0.3 -<0.90 (in at least one leg). Willing to comply with protocol requirements. Able to provide informed consent. Able to walk on a treadmill for more than 2 minutes -  Exclusion Criteria:  Subjects with HIV, hepatitis, significant liver disease, active infection, anemia, organ transplant, renal disease requiring dialysis, lung disease requiring oxygen, significant congenital heart disease, cancer of any type, and untreated thyroid disease. Diagnosis of carnosinemia. Known allergy to L-carnosine or meat. Obesity from a known genetic defect. Dementia. Critical limb ischemia with below or above knee amputations. Foot ulcers. Major amputations. Participating in other clinical trials. End stage renal disease. Presence of significant injury within 30 days before enrollment. Prisoners Poorly controlled diabetes (HbA1C >9%). Able to walk for more than 12 minutes. Currently taking Pletal (cilostazol) or Trentol (pentoxifylline) -