U.S. doctors online nowAsk doctors free
Seattle, WA
A 23-year-old male asked:

So if you drink water will the total blood volume in the body change due to extra water enter the system?

1 doctor answer4 doctors weighed in
Dr. Ira Friedlander
Cardiac Electrophysiology 44 years experience
Yes and No.: If you drink a lot of water you will absorb this through your gut and into the blood stream. Your kidneys will then regulate the solute balance and blood volume by excreting the excess as urine. Transiently there will be a slight increase in circulating volume and then the regulatory mechanisms will restore you to a normal balance. Clinically it is unlikely you would appreciate the transient.
Created for people with ongoing healthcare needs but benefits everyone.

Related questions

A 28-year-old male asked:
Would not drinking water cause blood in your semen?
2 doctor answers7 doctors weighed in
A 60-year-old male asked:
Will drinking water have any impact on blood sugar?
1 doctor answer3 doctors weighed in
A 30-year-old member asked:
Is it okay to drink water when fasting for blood work?
1 doctor answer1 doctor weighed in
A 33-year-old male asked:
When fasting for 12 hrs to do a blood test can u drink water ?
1 doctor answer2 doctors weighed in
A 32-year-old member asked:
Am i allowed to drink water while fasting for a blood sugar test?
1 doctor answer1 doctor weighed in
Last updated Feb 7, 2019


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.