How long maximum time slices of lemon we can put into a water? 12 hours or less or more? thanks

Lemonade: Lemonade, like lemon slices in water, should be safe for over 12 hours, if it's kept refrigerated.

The best is in 1 min: The best is in a minute or two. It refreshes the water. I use a drop of Essential Lemon Oil in my water. It is a concentrated oil and it helps in digestion and thirst.

Common sense: There’s no scientific evidence or study on this topic and to use your common sense is recommended. To protect your teeth, drink acidic beverages through a straw. Also the saliva has an alkaline PH and after 30 minutes will have neutralized the acidity of the lemon.