(-)- Epicatechin Becker Muscular Dystrophy

Inclusion Criteria: * Prior participation in UCD0113 BMD epicatechin pilot study * Male * Age 18 years to 70 years * Average to low daily physical activity * Ability to ambulate for 75 meters without assistive devices * Diagnosis of BMD confirmed by at least one the following: * Dystrophin immunofluorescence and/or immunoblot showing partial dystrophin deficiency, and clinical picture consistent with typical BMD, or * Gene deletions test positive (missing one or more exons) of the dystrophin gene, where reading frame can be predicted as 'in-frame', and clinical picture consistent with typical BMD, or * Complete dystrophin gene sequencing showing an alteration (point mutation, duplication, or other mutation resulting in a stop codon mutation) that can be definitely associated with BMD, with a typical clinical picture of BMD, or * Positive family history of BMD confirmed by one of the criteria listed above in a sibling or maternal uncle, and clinical picture typical of BMD. * Hematology profile within normal range * Baseline laboratory safety chemistry profile within normal range * No plan to change exercise regimen during study participation * Nutritional, herbal and antioxidant supplements taken with the intent of maintaining or improving skeletal muscle strength or functional mobility have been discontinued at least 2 weeks prior to screening (daily multivitamin use is acceptable). Exclusion Criteria: * Currently enrolled in another treatment clinical trial. * History of significant concomitant illness or significant impairment of renal or hepatic function. * Use of regular daily aspirin or other medication with antiplatelet effects within 3 weeks of first dose of study medication. * Regular participation in vigorous exercise. * Symptomatic heart failure with cardiac ejection fraction \<25%