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How Many Calories Does a Key Lime Have?

3 min read

A single medium-sized key lime contains only about 20 calories, making it an incredibly low-calorie fruit. This compact, nutrient-dense citrus adds a powerful punch of flavor without significantly contributing to your daily caloric intake. Understanding its full nutritional breakdown reveals why the key lime is a popular and healthy addition to many dishes and beverages.

Quick Summary

A medium key lime contains approximately 20 calories, primarily from carbohydrates and natural sugars. It is also an excellent source of vitamin C and dietary fiber. This comprehensive guide details the caloric content and other key nutrients of key limes, both whole and juiced, and offers context for adding them to a healthy diet.

Key Points

  • Low in Calories: A single medium key lime contains only about 20 calories, making it a very low-calorie fruit.

  • Rich in Vitamin C: Key limes are a great source of vitamin C, which is essential for immune function and skin health.

  • Good Source of Fiber: With approximately 2 grams of fiber, key limes support healthy digestion.

  • Packed with Antioxidants: This citrus fruit provides antioxidants that help protect your body's cells from damage caused by free radicals.

  • Versatile for Health: Its low-calorie profile and strong flavor make it a perfect addition to water, dressings, and marinades for a healthy boost.

In This Article

The Calorie Count of a Single Key Lime

When looking at the calorie count of a single key lime, it is important to note that the fruit is small and yields a modest amount of juice. The low caloric load makes it an ideal ingredient for enhancing flavor in dishes and drinks without adding excess energy. A medium-sized key lime, typically weighing around 67 grams, contains roughly 20 calories. The majority of these calories come from its carbohydrate content, while fats and proteins are negligible.

Factors Influencing Key Lime Calories

The precise caloric content can vary slightly based on several factors, including the size of the fruit, its ripeness, and cultivation conditions. Larger key limes will naturally have more calories than smaller ones. The nutritional information is a valuable starting point for anyone tracking their intake, whether for weight management or general health.

A Detailed Look at Key Lime Nutrition

Beyond just calories, key limes are packed with essential nutrients, making them a healthy addition to your diet. The primary nutrients found in a typical key lime are:

  • Vitamin C: Key limes are a fantastic source of vitamin C, a powerful antioxidant that supports the immune system and promotes healthy skin by stimulating collagen production.
  • Dietary Fiber: With about 2 grams of fiber per medium fruit, key limes support digestive health and can help promote regularity.
  • Potassium: This mineral plays a vital role in maintaining heart health and supporting proper blood circulation.
  • Antioxidants: Key limes contain various antioxidants, including flavonoids and limonoids, which help protect the body's cells from damage caused by free radicals.

Comparison: Key Lime vs. Persian Lime

While key limes are a popular choice, especially for their distinct aroma and tart flavor, it's useful to compare their nutritional profile to the more common Persian lime. Though similar in nutrient content, there are some subtle differences.

Feature Key Lime (Medium) Persian Lime (Medium)
Size Smaller, more acidic Larger, less acidic
Calories ~20 calories ~25 calories
Flavor Stronger, more aromatic, tart Milder, less complex flavor
Juice Yield Lower; about 2-3 teaspoons Higher; about 2-3 tablespoons
Ripeness Yellowish skin when ripe Typically sold green

Both offer a rich source of vitamin C and are low in calories, making either a healthy choice. The primary deciding factor often comes down to the desired flavor profile for a specific recipe.

How to Use Key Limes to Boost Your Health

There are numerous ways to enjoy the low-calorie benefits of key limes. Their unique flavor can elevate both savory and sweet dishes.

Simple and delicious uses for key limes:

  • Add to water: Squeeze fresh key lime juice into your water for a refreshing, hydrating, and low-calorie beverage.
  • Marinades and dressings: The tartness of key lime juice adds a bright flavor to marinades for chicken or seafood and can be used to create light, zesty salad dressings.
  • Cocktails and mocktails: Use key lime juice to add a fresh, tangy note to your favorite drinks, from classic cocktails to non-alcoholic spritzers.
  • Desserts: While famous for key lime pie, the juice can also be used in lighter dessert preparations, such as sorbets or low-sugar fruit salads.

Remember that while a whole key lime is low in calories, the final calorie count of a dish will depend on all ingredients used. For instance, a slice of traditional key lime pie, made with sweetened condensed milk and a pastry crust, will have a significantly higher caloric value.

Conclusion: The Low-Calorie, High-Flavor Choice

In summary, a key lime is a low-calorie fruit, containing approximately 20 calories per medium-sized fruit. Its nutritional benefits extend far beyond its minimal caloric impact, offering a significant dose of vitamin C, fiber, and other antioxidants. Whether you are counting calories or simply seeking a flavorful and healthy addition to your diet, the key lime provides a delicious solution. Incorporating its fresh, tart flavor into beverages, marinades, or desserts can enhance your meals without the extra calories often associated with more processed ingredients. For optimal health benefits, focus on using the fresh fruit and juice rather than processed versions with added sugars.

For more detailed nutritional information and health benefits of limes in general, you can consult reputable sources like the Healthline article on Limes.

Frequently Asked Questions

The caloric content of key lime juice is very low. An average key lime yields about 2-3 teaspoons of juice, with bottled versions often containing 0-2 calories per teaspoon, making it a virtually calorie-free flavor additive.

Yes, key limes can be beneficial for weight loss. They are very low in calories and fat, while their acidity can help boost metabolism and curb appetite. Drinking key lime water can also help increase hydration, which is crucial for weight management.

While both are nutritionally similar, key limes are smaller, more aromatic, and have a more intense flavor. Persian limes are larger, contain more juice, and have a milder taste. The calorie count per fruit is slightly higher for the larger Persian lime.

Yes, beyond being low in calories, key limes are rich in vitamin C and antioxidants. These components support immune function, promote healthy skin, aid digestion, and may even help lower the risk of certain chronic diseases.

Many people use key limes in 'detox' recipes, often by adding the juice to water. While it can aid hydration and provide antioxidants, the body naturally detoxifies itself. Incorporating key limes can support this process by boosting hydration and providing key nutrients.

To get the most juice from a key lime, roll it firmly on a counter or table before slicing it in half. You can also microwave it for 10-15 seconds to soften it, which helps release more juice when squeezed.

Bottled key lime juices can be a convenient option, but it is important to check the label. Some versions may have added preservatives or sweeteners. For maximum nutritional benefits and to avoid additives, fresh key lime juice is always the best choice.

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Medical Disclaimer

This content is for informational purposes only and should not replace professional medical advice.