U.S. doctors online nowAsk doctors free
A 45-year-old member asked:

What exactly is the difference between water-soluble and fat-soluble vitamins?

1 doctor answer2 doctors weighed in
Dr. Catherine Willner
Neurology 37 years experience
Vitamins: Fat soluble (a, d, e, k) have to be processed for absorption with enzymes that digest fat. They can be stored in fatty storage areas so if too much taken, toxicity can occur. Vitamin d from sun is controlled by body's storage and processing to avoid that. Water soluble vitamins typically not stored so need to be taken daily.
Created for people with ongoing healthcare needs but benefits everyone.
Last updated Feb 8, 2016
Connect with a U.S. board-certified doctor by text or video anytime, anywhere.
24/7 visits - just $44!
50% off with $15/month membership


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.