Alkalizing our bodies: Despite the acidity of the juice, once it interacts with water molecules and enters the body it actually forms alkaline molecules that contribute to a healthy and balanced pH level.
Stimulates the liver and digestion: The acidic and phytochemical properties of lemon “kick start” your digestive organs so they are ready to function well all day.
Anti-microbial: Lemon Juice has been traditionally used as a home remedy for a sore throat or cold due to its anti-bacterial properties.
Increase hydration: Adding lemon makes the water taste a little better therefore we tend to drink more. Generally, most people don’t drink enough water throughout the day so any little incentive helps, especially right in the morning.
However what about lemon slices/wedges they give you at a restaurant? Even health conscious people ask for plain water and lemon instead of drinking alcohol or soda pop. Well, it turns out the lemon wedges actually can do you more harm then good. A study found that most of those lemon slices can be contaminated with bacteria. This can expose you to infection which can cause vomiting and diarrhea. The rinds (the outside of a lemon) also aren't usually washed so they most likely contain pesticide residues as well. YUK!
So the last thing you want to do after squeezing the lemon juice into your glass is throw the slice in as well. The best option is discarding it after getting your drink. To be ultra safe you shouldn't even squeeze in the juice.