Are You Drinking Enough Water? Why Hydration Is Essential for Healing
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This is a common question we hear from our social media community, during educational classes, and in nutrition consultations with our patients. Many wonder how much water they should drink daily and whether drinking water with meals supports or impedes digestion. Before going into the pros and cons of drinking water during meals, let’s explore the essential role of water in the human body and why staying properly hydrated is critical for overall health and healing.
The Role of Water in the Body: Why Hydration Matters
Water is essential for life, not just human life but life on Planet Earth. Water covers about 71% of Earth’s surface, with 97.5% being salt water and 2.5% being freshwater. Of the freshwater, only 0.3% is in liquid form on the surface and available for human use1,2,3.
Water Body Composition
The human body is about 60% water, though this percentage can vary depending on age, sex, and body composition. Key organs have even higher water content: the brain and heart are approximately 73% water, while the lungs are around 83%. The skin contains about 64% water, muscles and kidneys are 79%, and even bones, often thought of as dry, are about 31% water. This distribution highlights water’s vital role in maintaining essential bodily functions4,5.
Daily Water Needs
Humans must consume a certain amount of water daily to survive. Water balance in the human body is tightly regulated, with even a 1% water loss typically corrected within 24 hours. Water intake and loss are adjusted through homeostatic mechanisms triggered by changes in plasma osmolarity6.
While specific needs depend on factors such as age, sex, activity level, and climate, general guidelines suggest that adult males require about 3 liters (roughly 13 cups or 3.2 quarts) of water per day, while adult females need about 2.2 liters (approximately 9 cups or 2.3 quarts). However, not all of this water needs to come from beverages alone. A significant portion is found in the foods we eat, particularly fruits and vegetables, which contribute to overall hydration and support bodily functions essential for health and well-being5. At An Oasis of Healing, we provide our patients daily with fresh cold-pressed green juice that supports adequate hydration and nutrition. Find our delicious recipe HERE.
Water performs vital roles essential to maintaining life and overall health5,6:
- Building Material: It is a critical component of every cell in the body, forming tissues and organs.
- Chemical Reactions: Water acts as a solvent, reaction medium, and even a reactant in various biochemical processes.
- Nutrient and Waste Transport: It facilitates the transport of carbohydrates, proteins, and other nutrients through the bloodstream while aiding in waste removal via urination.
- Thermoregulation: It regulates internal body temperature through sweating and respiration.
- Lubrication and Protection: Water lubricates joints, forms saliva, and serves as a shock absorber for the brain, spinal cord, and developing fetus.
Signs of Dehydration
Dehydration occurs when the body loses more fluids than it takes in, disrupting the essential balance of water and salts needed for healthy cell and tissue function. Common causes include illnesses, hot or dry climates, prolonged sun exposure, inadequate water intake, and the use of diuretics or medications that increase urination. Maintaining proper hydration is crucial for overall health7.
Some of the most common symptoms of dehydration include but are not limited to8:
- Fatigue
- Thirst
- Dry skin and lips
- Dark urine or decreased urine output
- Headaches
- Muscle cramps
- Lightheadedness
- Dizziness
- Syncope
- Orthostatic hypotension
- Palpitations
The person’s history may bring forth factors that could cause dehydration, such as medications, illness, exercise, heat exposure, impaired access to water, fever, or fluid loss. At An Oasis of Healing, our care team pays close attention to these symptoms, ensuring that our patients stay properly hydrated—a vital aspect of effective detoxification and healing.
While healthy adults manage water balance effectively, infants and the elderly are more vulnerable to dehydration, which can cause serious health issues such as weakness, speech problems, and cardiovascular symptoms.
Children
Infants and children have a higher percentage of total body water than adults, approximately 65% to 80%. Young children are especially vulnerable to dehydration because they cannot communicate their thirst effectively or access fluids on their own. This makes them more prone to fluid loss, especially during illnesses such as vomiting and diarrhea, which are leading causes of dehydration in children. Diarrheal diseases are a significant global health issue, causing 14% to 30% of deaths among infants and toddlers worldwide, particularly in resource-limited regions where access to clean water and healthcare is restricted. Severe dehydration occurs when water and electrolyte losses from liquid stools are not adequately replaced, emphasizing the urgent need for preventive measures and timely medical intervention9,10,11,12.
The high mortality rates highlight the critical need for preventive measures such as access to clean water, improved sanitation, and timely medical care to manage dehydration and its complications effectively.
Elderly
Dehydration affects 20% to 30% of older adults and poses more significant health risks compared to younger populations. In older adults, it is linked to higher rates of mortality, morbidity, and disability. The primary cause is often insufficient water intake, though excessive water loss due to illness or medication side effects can also contribute. Ensuring adequate hydration is critical to reducing health complications in this vulnerable group13,14.
Contributing factors to dehydration include lower muscle mass, reduced kidney function, cognitive and physical impairments, a diminished sense of thirst, and polypharmacy (the simultaneous use of multiple medications). While water-loss dehydration is linked to poor health outcomes such as cognitive decline, reduced quality of life, and frequent hospital admissions, more research is needed to establish causality. Chronic low fluid intake often goes unrecognized due to the challenges in diagnosing dehydration and attributing its symptoms to water depletion, underscoring the critical need for proactive hydration management in elderly populations13,14,15,16.
Conclusion and Upcoming Blog
We have explored the critical role of hydration for overall health, the widespread issue of dehydration—especially among vulnerable groups like the elderly and young – and how to recognize its warning signs. Now, it’s time to tackle a frequently asked question: should I drink water with meals? In the upcoming blog, we will discuss this common practice’s potential benefits and drawbacks, helping you make informed choices to support your digestive health.
References
- Shiklomanov’s I. Chapter 2: World fresh water resources. Water in crisis: a guide to the world’s fresh water resources. Gleick, P. (editor). Oxford University Press, 1993.
- How Much Water is There on Earth? [Internet]. United States Geological Survey. Nov 13, 2019. Available from: https://www.usgs.gov/special-topics/water-science-school/science/how-much-water-there-earth, accessed Dec 13, 2024.
- Where is Earth’s Water [Internet]. United States Geological Survey. Last Modified 05 Nov, 2013. Available: from: https://web.archive.org/web/20131214091601/http://ga.water.usgs.gov/edu/earthwherewater.html, accessed Dec 13, 2024.
- Mitchell H. Hamilton T. Steggerda F. Bean H. The chemical composition of the adult human body and its bearing on the biochemistry of growth. Journal of Biological Chemistry. 1945;158 (3):625-637.
- The Water in You: Water and the Human Body. [Internet]. United States Geological Survey. May 22, 2019. Available from: https://www.usgs.gov/special-topics/water-science-school/science/water-you-water-and-human-body, accessed Dec 13, 2024.
- Jéquier E, Constant F. Water as an essential nutrient: the physiological basis of hydration. Eur J Clin Nutr. 2010 Feb;64(2):115-23. doi: 10.1038/ejcn.2009.111. Epub 2009 Sep 2. PMID: 19724292.
- The Free Dictionary [Internet]. “dehydration”. Gale Encyclopedia of Medicine, The Gale Group, Inc., 2008 [cited 16 Dec. 2024]. Available from: https://medical-dictionary.thefreedictionary.com/dehydration
- Taylor K, Tripathi AK, Jones EB. Adult Dehydration. [Updated 2022 Oct 3]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK555956/
- Daley SF, Avva U. Pediatric Dehydration. [Updated 2024 Jun 8]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK436022/
- Florez ID, Sierra J, Pérez-Gaxiola G. Balanced crystalloid solutions versus 0.9% saline for treating acute diarrhoea and severe dehydration in children. Cochrane Database Syst Rev. 2023 May 17;5(5):CD013640. doi: 10.1002/14651858.CD013640.pub2. PMID: 37196992; PMCID: PMC10192509.
- Hartman S, Brown E, Loomis E, Russell HA. Gastroenteritis in Children. Am Fam Physician. 2019 Feb 1;99(3):159-165. Erratum in: Am Fam Physician. 2019 Jun 15;99(12):732. PMID: 30702253.
- Santillanes G, Rose E. Evaluation and Management of Dehydration in Children. Emerg Med Clin North Am. 2018 May;36(2):259-273. doi: 10.1016/j.emc.2017.12.004. Epub 2018 Feb 10. PMID: 29622321.
- Miller HJ. Dehydration in the Older Adult. J Gerontol Nurs. 2015 Sep 1;41(9):8-13. doi: 10.3928/00989134-20150814-02. PMID: 26375144.
- Hooper L, Bunn D, Jimoh FO, Fairweather-Tait SJ. Water-loss dehydration and aging. Mech Ageing Dev. 2014 Mar-Apr;136-137:50-8. doi: 10.1016/j.mad.2013.11.009. Epub 2013 Dec 9. PMID: 24333321.
- Dhar M, Mittal K, Pathania M, Kalra S. Dehydration in Elderly: Revisiting the Assessment and Management Strategies. J Assoc Physicians India. 2023 Dec;71(12):47-50. doi: 10.59556/japi.71.0332. PMID: 38736054.
- Beck AM, Seemer J, Knudsen AW, Munk T. Narrative Review of Low-Intake Dehydration in Older Adults. Nutrients. 2021 Sep 9;13(9):3142. doi: 10.3390/nu13093142. PMID: 34579019; PMCID: PMC8470893.
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