Lemon Water: Calories, Nutrition and Health Benefits
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Perplexity A glass of lemon water made with the juice of half a lemon has about 5 calories and under 2 g of carbs. It stays near zero until you add honey or sugar, which is where nearly all the calories come from.
Quick Nutrition Facts
Per 1 glass (240 ml water + juice of half a lemon, about 24 g)
| Nutrient | Amount |
|---|---|
| Calories | 5 kcal |
| Protein | 0.1g |
| Carbohydrates | 1.7g |
| Fiber | 0.1g |
| Sugars | 0.6g |
| Fat | 0.1g |
| Sodium | 0.2 mg |
Macronutrient Breakdown
NUTRITIONIST'S INSIGHT
Lemon water is a flavoured way to drink more water, and that is its main value. The juice of half a lemon adds a small amount of vitamin C and potassium and about 5 kcal. It does not burn fat or detox anything. The practical cost is acidity: sipping it all day bathes teeth in acid, so drink it in one sitting, use a straw if you like, and rinse with plain water afterwards.
Myth Busters
MYTH #1: Lemon water burns belly fat
TRUTH: No food or drink targets fat in one body area. Lemon water has about 5 kcal a glass, so it only helps if it replaces a sugary drink. The calories you save are the effect, not the lemon. USDA FoodData Central: Lemon juice, raw (FDC ID 167747)
MYTH #2: Lemon water is alkaline and balances your body's pH
TRUTH: Lemon juice is acidic, with citric acid at about 49 g per kg of juice. Your kidneys and lungs hold blood pH steady no matter what you drink. Lemon water changes urine chemistry slightly, not blood pH. Quantitative Assessment of Citric Acid in Lemon Juice, Lime Juice, and Commercially-Available Fruit Juice Products (J Endourol)
MYTH #3: Lemon water is harmless for teeth because it is mostly water
TRUTH: Acidic drinks including fresh lemonade soften enamel more than plain water. The American Dental Association suggests keeping them an occasional drink, using a straw and rinsing with water afterwards. MouthHealthy (American Dental Association): Erosion, what you eat and drink can impact teeth; Acidic beverages increase the risk of in vitro tooth erosion (Nutr Res)
MYTH #4: Lemon water prevents kidney stones on its own
TRUTH: Lemon juice raises urinary citrate, which helps stop calcium oxalate stones, but the evidence is mixed. In a 2021 randomised trial fresh juice supplementation did not clearly reduce recurrence. The benefit that holds is drinking more fluid overall. Medical and Dietary Therapy for Kidney Stone Prevention (Korean J Urol); Fresh lemon juice supplementation for the prevention of recurrent stones in calcium oxalate nephrolithiasis (PROBE trial)
NutriScore by Health Goals
| Health Goal | NutriScore | Why This Score? |
|---|---|---|
| Weight loss |  | About 5 kcal a glass. It helps when it replaces soda or juice, and adds nothing when it replaces plain water. USDA FoodData Central: Lemon juice, raw (FDC ID 167747) |
| Blood sugar control | | Under 2 g of carbs per glass, so it barely moves glucose. Honey or sugar is the only part that does. USDA FoodData Central: Lemon juice, raw (FDC ID 167747) |
| Hydration | | It is water with a taste, which makes some people drink more of it through the day. USDA FoodData Central: Lemon juice, raw (FDC ID 167747) |
| Dental health |  | The acid in lemon juice can soften enamel, especially when sipped slowly over hours. MouthHealthy (American Dental Association): Erosion, what you eat and drink can impact teeth; Acidic beverages increase the risk of in vitro tooth erosion (Nutr Res) |
| Kidney stone prevention |  | Extra fluid and citrate help in people prone to calcium oxalate stones, though lemon juice alone has mixed trial results. Medical and Dietary Therapy for Kidney Stone Prevention (Korean J Urol); Fresh lemon juice supplementation for the prevention of recurrent stones in calcium oxalate nephrolithiasis (PROBE trial) |
PERSONALIZED NUTRITION
Track your meals with NutriScan for personalized NutriScores based on your specific health goals!
Blood Sugar Response to Lemon Water
Plain lemon water has about 1.7 g of carbohydrate per glass, so it should leave blood glucose flat for most people. Adding a teaspoon of honey adds about 6 g of sugar and a small, short rise. USDA FoodData Central: Lemon juice, raw (FDC ID 167747)
Typical Glucose Response Curve
Not medical advice
How to flatten the spike
- Drink it unsweetened. One teaspoon of honey or sugar adds 5-6 g of carbs and is the only part that moves glucose.
- Have it with a meal if you want a gentler effect from any added sweetener.
- Squeeze the lemon yourself: bottled lemon waters often carry 5-10 g of added sugar per serve.
- Use it in place of soda or juice, which is where the glucose benefit comes from.
Cultural Significance
Warm lemon water is a morning habit in many homes, from the lemon-and-hot-water routine popular in US and European wellness circles to nimbu pani in India. Restaurants in much of Europe and the US serve a lemon wedge in tap water by default, and cold lemon water is a common drink in the Middle East and Mediterranean.
Compare & Substitute
Lemon Water vs Similar Foods
| Nutrient | Plain water (240 ml) | Cucumber water (240 ml) | Lemonade (240 ml) | Unsweetened green tea (240 ml) |
|---|---|---|---|---|
| Calories | 0 kcal | 1 kcal | 99 kcal | 2 kcal |
| Protein | 0g | 0g | 0.2g | 0.5g |
| Carbohydrates | 0g | 0.2g | 26g | 0g |
| Fat | 0g | 0g | 0.1g | 0g |
Frequently Asked Questions
How many calories are in lemon water?
A glass made with the juice of half a lemon has about 5 calories. A thin wedge squeezed into a glass adds around 1 calorie. Honey or sugar is where the calories come from: a teaspoon of honey adds about 21.
Does lemon water help you lose weight?
Only indirectly. It has about 5 calories, so swapping it for soda or juice cuts calories. There is no evidence that lemon itself burns fat.
Is lemon water bad for your teeth?
It can be if sipped all day. Lemon juice is acidic and can soften enamel. Drink it in one sitting, use a straw, and rinse your mouth with plain water afterwards.
Does lemon water spike blood sugar?
No. A glass has under 2 g of carbs, so glucose stays flat. Adding sugar or honey is what raises it.
Is warm lemon water in the morning better than cold?
No difference in nutrition. The calories and vitamin C content are the same. Pick the temperature you will actually drink.
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