It is best not to drink water with a meal at all, but if you must, drink water with a neutral pH (pH 7.0). Alkaline water will neutralise the acids required for digestion. Even neutral water will do this to a certain extent; this is why drinking with meals is not recommended. Wait at least 30 minutes to 1 hour following each meal before you drink more water; this allows food to leave your stomach. Our stomach needs to be acidic to digest the food we eat, and drinking alkaline water with meals will simply slow down the digestion process.