Replied by Ted (Bangkok, Thailand)
Dear Mary: Ulcers are caused by helicobacter pylori, a bacterium. The other cause of ulcers that I am aware of is doctor's antibiotics. The antibiotics tend to prevent the body from ridding itself of heavy metals and a fungus or yeast develops.
If it develops in the esophagus or the stomach, then you can get ulcers, or you can get acid reflux. If you fear for ulcers, just take baking soda 1/4 teaspoon to 1/2 glass of water taken twice a day and stay away from antibiotics.