The question of whether to drink water or coffee first thing in the morning has sparked debate about the impact on hydration and blood sugar levels.
Scientific studies and recommendations from specialists are examining whether the order of consumption has real implications for metabolism. Understanding these effects is important for maintaining overall health and well-being.
During sleep, the body loses between 400 and 700 milliliters of fluid through evaporation. This fluid loss makes morning hydration important for restoring fluid balance and supporting physiological function.
The Academy of Nutrition and Dietetics recommends a daily fluid intake of approximately nine cups of water for women and thirteen cups for men, considering both beverages and food. Drinking one or two glasses of water upon waking contributes to meeting this daily requirement.
Publications cited by Excellent Housekeeping suggest that starting the day with water may be associated with improvements in mood and memory, though these effects can vary from person to person.
Coffee and Hydration: Does it Really Dehydrate?
Coffee is one of the most widely consumed beverages globally and contains antioxidants, including polyphenols and hydroxycinnamic acids, associated with cellular protection and a reduced risk of neurodegenerative diseases.
Contrary to the belief that its diuretic effect can lead to dehydration, research published in PLOS ONE and guidance from the Mayo Clinic indicate that caffeine only slightly increases urine production. In regular coffee drinkers, this effect doesn’t typically result in significant dehydration, as the fluid provided by the beverage offsets the loss.
In healthy individuals, moderate consumption – one or two cups a day – does not substantially alter fluid balance.
Does the Order Matter for Blood Sugar?
Analysis of the order of consumption focuses on glucose. Caffeine stimulates the central nervous system and can increase the release of adrenaline, which in some cases leads to temporary increases in blood sugar levels.
Some research suggests that adequate hydration before consuming coffee may support a more stable metabolic response and contribute to insulin sensitivity. Studies published in Frontiers in Nutrition highlight the importance of hydration status in regulating blood glucose.
specialists often recommend that individuals with diabetes or those who demand to monitor their blood sugar drink water a few minutes before coffee. However, the reaction depends on individual sensitivity and the amount consumed.
Digestion and Daily Routine
Some professionals indicate that drinking water immediately followed by coffee could temporarily dilute gastric juices in people with sensitive digestion. In these cases, they recommend waiting about 15 minutes between beverages.
Regarding temperature, there is no conclusive evidence to suggest that warm water has metabolic advantages over room-temperature water.
Expert Conclusions
Experts agree that, in healthy individuals, there are no clinically relevant differences between drinking water before or after coffee. Maintaining sufficient hydration and moderating caffeine intake are the main factors.
For those who need to monitor their glucose, starting the day with water can be considered a practical measure to support metabolic balance. Both water and coffee can be incorporated into a daily routine, as long as they are consumed in moderation and as part of a balanced lifestyle.
