U.S. doctors online nowAsk doctors free
A 23-year-old member asked:

How safe is to drink 2 gallons a water a day while on a low calorie diet?

2 doctor answers2 doctors weighed in
Dr. Kenneth Cheng
Family Medicine 32 years experience
Not safe: Consuming excess water can "dilute" your body causing electrolyte imbalances. Electrolytes are important as every cell in our body requires a proper balance of electrolytes. Electrolytes can be replenished in our diet, but eating a low calorie diet puts one at risk for not consuming sufficient electrolytes. Seek your doctor's advise before implementing any diet change.
Dr. Gregg Nishi
Bariatrics 23 years experience
Water intake: Not really safe. You need roughly 64 ounces of fluid a day. 2 gallons of water is 256 ounces of fluid, not only that, it is free water rather than balanced electrolytes. The net effect will be that you will eventually become hyponatremic and that can cause you all sorts of problems. You could probably do a gallon and still be okay. 2 is pushing it.

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

Ask doctors free
Educational text
Free
Talk to a doctor
24/7 visits - just $39!
50% off with $15/month membership
Last updated Jun 4, 2015

Disclaimer:

Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.