Lemon juice is good for acid reflux as long as you mix the lemon juice with some water to dilute it as drinking the lemon juice full strength could cause more acid production in your stomach.
But when you add water to the lemon juice and drink the diluted lemon juice in small amounts the lemon juice can help reduce acid reflux.
The lemon juice when mixed with some water and drank in small amounts can have an alkalizing effect when it's digested.
The alkalizing effect helps to neutralize the acid production in your stomach which helps reduce the acid reflux.
Some other good juices that are good for acid reflux are carrot juice, aloe vera juice and even cabbage juice.
Those juices are also healthy for you so you help reduce the acid in your stomach plus help improve your health as well.