The abnormal metabolic milieus of hyperglycemia, hyperlipidemia, hypertension, pro-thrombotic state and chronic inflammation in diabetes causes atherosclerosis. A significant proportion of subjects have underlying peripheral arterial disease and neuropathy. These subjects are at great risk of developing infective foot ulceration secondary to impaired vascular supply, sensory loss and minor trauma. Without prompt and proper medical treatment, these infective ulcers will deteriorate leading to gangrene and limb amputation. Age, wound depth, the presence of ischaemia, a low albumin level, and the lack of simultaneous ulceration are the most significant independent predictors of an unfavourable outcome. The conventional management of diabetic foot ulcer includes rest, antibiotic therapy, surgical debridement and good glycemic control. The investigators previously demonstrated that the use of a recipe containing 12 herbs was effective in promoting the healing of severe chronic non-healing diabetic foot ulcers and achieved an 85% of limb preservation. In-vitro and in-vivo studies revealed that 5 out of the 12 herbs were effective in promoting fibroblast proliferation and angiogenesis. To minimize potential drug interactions and adverse effects from multiple components in a recipe of Traditional Chinese Medicine (TCM), the investigators have developed a simplified formula from the 12 herbs consisting of only two herbs.