http://www.foodreactions.org/intolerance/lactose/symptoms.ht

[Elsie]

I've just read the following extract on the above website and wonder if Lactose Intolerace could be the cause of some forms of bad breath...

"When lactose is not digested, it remains in the intestines exerting osmotic effects. Osmotic pressure draws fluids and salts into the gut which moves rapidly towards the large intestines. This increased level of fluid and salts in the colon helps the bacteria to ferment lactose into short-chain fatty acids (SCFA), Carbon Dioxide (CO2), Methane (CH4), Hydrogen (H2) and Hydrogen Sulphide (H2S), the odour associated with flatulence. Hydrogen is one of the gases that cause bloating but due to its small size it escapes through the walls of the intestine into the bloodstream and is expelled through the lungs."