Lemon water is calories free as water but it taste better acts as a blood sugar stabilizer , boots your metabolism, it contains calcium, it balances PH,  it kick starts your digestive system, helps with weight loss, and helps to control your coffee habit.
Lemon is also a natural energizer, it hydrates and oxygenates the body so it feels revitalized and refreshed,  and can clean and glowing the skin.
Lemon water is an excellent source of anti-oxidants and vitamin C, which prevents formation of free radicals. These free radicals can cause death of the cells and rob electrons. It’s an excellent remedy for a hangover.

Benefits Of Drinking  Lemon Water

Boosts your immune system: Lemons are high in vitamin C, which is great for fighting colds.  They’re high in potassium, which stimulates brain and nerve function. Potassium also helps control blood pressure. Lemon is an excellent fruit that aids in fighting problems related to throat infections, sore throat andtonsillitisas it has an antibacterial property. For sore throat, dilute one-half lemon juice with one-half water and gargle frequently.
Controls High Blood Pressure: Lemon water works wonders for people having heart problem, owing to its highpotassiumcontent. It controls high blood pressure, dizziness, nausea as well as provides relaxation to mind and body. It also reduces mental stress and depression.

Acts as a blood purifier: The diseases like cholera or malaria can be treated with lemon water as it can act as a blood purifier.
Reduces Fever: Lemon water can treat a person who is suffering from cold, flu or fever. It helps to break fever by increasing perspiration.
Aids digestionLemon juice helps flush out unwanted materials.  Efficient digestion reduces heartburn and constipation.  It’s good for your stomach  - Lemon can help relieve many digestion problems when mixed with hot water. These include nausea, heartburn and parasites. Due to the digestive qualities of lemon juice, symptoms of indigestion such as heartburn, bloating and belching are relieved. By drinking lemon juice regularly, the bowels are aided in eliminating waste more efficiently. Lemon acts as a blood purifier and as a cleansing agent.  It is even known to help relieve hiccups when consumed as a juice. Lemon juice acts as a liver tonic and helps you digest your food by helping your liver produce more bile. It decreases the amount of phlegm produced by your body. It is also thought to help dissolve gallstones.
Treating Rheumatism: Lemon is also adiureticand hence lemon water can treat rheumatism and arthritis. It helps to flush out bacteria and toxins out of the body.
Relieves respiratory problems: Lemon water assists in curing respiratory problems, along with breathing problems and revives a person suffering from asthma. Warm lemon water helps get rid of chest infections and halt those pesky coughs. It’s thought to be helpful to people with asthma and allergies too.

Balances pH: Drink lemon water everyday and you’ll reduce your body’s overall acidity. Lemon is one of the most alkaline foods around. Yes, lemon has citric acid but it does not create acidity in the body once metabolized.
Excellent for weight loss:   Lemons are high in pectin fiber, which helps fight hunger cravings. It also has been shown that people who maintain a more alkaline diet lose weight faster. Drinking lemon water is that it paves way for losing weight faster, thus acting as a great weight loss remedy. If a person takes lemon juice mixed with lukewarm water and honey, it can reduce the body weight as well.

Is a diuretic: Lemons increase the rate of urination in the body, which helps purify it. Toxins are, therefore, released at a faster rate which helps keep your urinary tract healthy.

Clears skin:  Lemon, being a natural antiseptic medicine, can participate to cure problems related to skin. Lemon is a vitamin C rich citrus fruit that enhances your beauty, by rejuvenating skin from within and thus bringing a glow on your face. Daily consumption of lemon water can make a huge difference in the appearance of your skin. It acts as ananti-agingremedy and can remove wrinkles and blackheads.  Lemon water purges toxins from the blood which helps keep skin clear as well. It can actually be applied directly to scars to help reduce their appearance. As lemon is a cooling agent, it reduces the burning sensation on the skin.

Aids in dental care: Lemon water is used in dental care also. If fresh lemon juice is applied on the areas of toothache, it can assist in getting rid of the pain and gingivitis. The massages of lemon juice on gums can stop gum bleeding. It gives relief from bad smell and other problems related to gums.
Keeps you zen: Vitamin C is one of the first things depleted when you subject your mind and body to stress. As mentioned previously, lemons are chock full of vitamin C.
Helps kick the coffee habit:  After I have a glass of hot lemon water, I actually don’t crave coffee in the morning. This is weird, I can’t explain it, but I’ll take it.

Sources: lajollamom.com, Life Mijo, Buzzle