How Much Water Do I Need to Drink? Do I Really Need 8 Glasses a Day? All Trending Articles Health Skin Care Truths 01/25/202201/26/2022 by Fayne Frey, MD Board Certified Dermatologist Where did the recommendation for 8 glasses of water/day come from? On a regular basis I hear “experts” tout the benefits of drinking water, and lots of it. I agree that water is a good thing, and that it's very important to keep ourselves hydrated.