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“If you are Asian and drink alcohol frequently, you may have a higher risk of getting stomach or oesophageal cancer or peptic ulcers due to a genetic inability to efficiently process acetaldehyde, a toxic by-product of alcohol metabolism,” says Dr Victor Lee Tswen Wen, Consultant Surgeon,Department of Hepatobiliary & Transplant Surgery, Singapore General Hospital (SGH), a member of the SingHealth group.