NATURAL Heartburn remedy tips from a doctor:, Chewing sugar free gum after eating increases saliva production, which helps neutralize and wash away acid that has crept up into the esophagus., Graphical review: The redox dark side of e cigarettes; exposure to oxidants and public health concerns ScienceDirect Does Smoking Tobacco Make Heartburn Worse? Smoking and reflux disease Peptest Non Invasive Saliva Reflux Test to Detect Pepsin RD Biomed UK