Milk Might Hydrate Better Than Water in the Thai Heat, But Nuance Is Key
A study from St. Andrews University in Scotland challenges the idea that water is always the best hydrator. It suggests that drinks with nutrients—like milk, which contains sugar, fat, and protein—can help retain hydration longer. For Thai readers facing high temperatures and a wide range of drinks—from iced coffee to herbal brews—this finding offers practical insight: milk may support longer-lasting hydration, but the full story is more complex.
Data from this research shows water is absorbed quickly, but beverages with small amounts of sugar, fat, or protein slow stomach emptying and help water stay in the body longer. Milk stood out because its combination of lactose, fat, protein, and sodium helps conserve fluids. Sodium helps the kidneys retain water, reducing urine output and aiding steadier hydration. This aligns with why oral rehydration solutions, which balance sugar and salts, are recommended for dehydration from illness, a concern for Thai communities during hot seasons.