The efficacy of chewing gum is probably due to the effect of stimulated saliva flow. Prolonged chewing can get stomach all excited and prepared for food when really none is forthcoming. The best compromise appears to be to choose only sugarless gum and to chew gum only for a minute or two at a time. The best time is to chew during the brief visit to washroom and to abandon it just before leaving the washroom. Mouth-sprays and regular mint candies are relatively ineffective in fighting bad breath.
Sprays contain high concentration of alcohol.
Alcohol is a good deodorant, however it can dry up your mouth intensifying bad breath. Also, alcohol irritates your tooth gums as well. An orange, a cup of tea or a cup of lime water is better and healthier. It is true though adapting a healthier diet and drinking adequate water can help to eliminate breath odors and body odors. After eating foods with high levels of proteins like dairy products,meat , onion, garlic, spices Prior to or during the menstrual period, perhaps because the gums tend to get swollen so food debris and bacteria can get trapped easily.