Questions: Hydration and Beverages Nutrition

Question 1

You've just finished a 40-minute moderate workout. A friend recommends you drink a sports electrolyte beverage to 'replenish electrolytes.' What does the evidence say?

• A. You should always drink an electrolyte drink after any workout to replace sodium and potassium
• B. For moderate-length exercise, water is sufficient — electrolyte drinks are designed for prolonged exercise over 60–90 minutes
• C. Coffee is a better option because it restores energy and provides net hydration
• D. You should avoid all beverages for 30 minutes after exercise to let your body rebalance

Answer: (B)

Electrolyte drinks are designed for a specific scenario: prolonged exercise (60–90+ minutes) where significant sodium and potassium are lost through sweat. For a 40-minute workout, fluid and electrolyte losses are modest and easily replenished through normal dietary intake. Drinking a sports beverage after routine exercise adds unnecessary sugar and calories without a corresponding physiological need. Water is the appropriate default for moderate activity.

Question 2

You're comparing almond milk and soy milk to use as a protein source in your diet. Which is the most important nutritional difference between them?

• A. Soy milk has significantly more protein and most closely approximates cow's milk in that regard
• B. Almond milk has more calcium because almonds are naturally high in calcium
• C. Both provide equivalent protein because they are both plant-based
• D. Soy milk has more carbohydrates and should be avoided by people monitoring sugar intake

Answer: (A)

Soy milk is the plant-based milk that most closely matches cow's milk in protein content (around 7–8g per cup). Almond milk is primarily water with added vitamins and contains very little protein (typically ~1g per cup). This distinction matters significantly when beverages serve as a meaningful nutrient source. The 'plant-based' label says nothing about protein content — the source plant determines the nutritional profile.

Question 3

Unsweetened coffee and tea contribute net fluid to your daily hydration, despite containing caffeine.

• T. True
• F. False

Answer: True

Although caffeine is a mild diuretic, the volume of fluid in coffee and tea exceeds the mild diuretic effect — the net result is a contribution to hydration, not a reduction. Research consistently shows moderate coffee and tea consumption counts toward daily fluid intake. Both beverages also deliver polyphenols with potential health benefits. The folk belief that 'coffee dehydrates you' overstates the diuretic effect.

Question 4

Most plant-based milks (almond, soy, oat) provide roughly equivalent nutrition to cow's milk.

• T. True
• F. False

Answer: False

Plant-based milks vary substantially. Soy milk most closely matches cow's milk in protein (~7–8g per cup). Oat milk is higher in carbohydrates. Almond milk is mostly water with added vitamins and very low protein (~1g per cup). Fortification adds vitamins and calcium to most plant milks, but the protein profile differs dramatically by source. Treating them as interchangeable is a meaningful nutritional error, particularly for children, older adults, or those with limited dietary variety.

Question 5

Why is it misleading to say that water is the 'only healthy beverage,' and what is a more accurate way to think about beverage choices?

Model answer: Water is the ideal default for hydration, but many other beverages contribute genuine nutritional value alongside fluid. Unsweetened coffee and tea deliver polyphenols and net hydration. Milk and soy milk provide protein, calcium, and fat. Framing water as the only healthy option causes people to overlook both the benefits of other beverages (polyphenols, protein) and their costs (sugar, excess calories). A better framework: use water as the default, count unsweetened coffee and tea as contributors, evaluate plant milks for their actual nutritional profile, and treat sugary drinks as an occasional food rather than a hydration source.

Different beverages serve different nutritional roles and cannot be ranked on a single 'healthy/unhealthy' axis. The key skill is reading beverages as nutrition — understanding what each contributes and costs — rather than treating water as uniquely virtuous and everything else as a compromise.