Is Lime a Good Source of Protein? Separating Myth from Fact

January 6, 2026 •

3 min read

Limes are a nutritional powerhouse, but contrary to popular misconceptions, they are not a significant source of protein. While they contribute to overall health with a robust profile of vitamins and antioxidants, relying on citrus fruits for your daily protein intake is not an effective strategy.

Quick Summary

This article explores the nutritional composition of limes, debunking the myth that they are a good source of protein and highlighting their primary health benefits, such as high vitamin C content.

Key Points

Low Protein Content: Limes contain a very small amount of protein, typically around 0.5g per fruit, and are not a significant source.
Rich in Vitamin C: The primary nutritional benefit of limes is their high vitamin C content, which supports immune function and skin health.
Powerful Antioxidants: Limes contain flavonoids and other antioxidants that protect the body's cells from damage.
Aids Nutrient Absorption: The vitamin C in limes enhances the body's ability to absorb iron from plant-based foods.
Complementary, Not Primary: Limes should be seen as a complementary food for flavor and micronutrients, not as a primary source of macronutrients like protein.
Better Protein Sources Exist: Lean meats, dairy, eggs, legumes, and nuts are far more effective and practical sources for meeting daily protein needs.

Understanding Lime's Nutritional Profile

Limes are a staple in many cuisines, celebrated for their sharp flavor and culinary versatility. However, their contribution to a person's protein requirements is negligible. According to USDA data, one average-sized lime (around 67 grams) contains only about 0.5 grams of protein. This low amount is consistent with the nutritional makeup of most fruits, which are primarily known for carbohydrates, vitamins, minerals, and antioxidants.

The Real Stars: Vitamins and Antioxidants

Instead of being a protein source, the true nutritional value of a lime lies in its rich content of vitamin C and other beneficial compounds.

High Vitamin C: A single lime can provide a significant portion of the recommended daily intake of vitamin C, an essential nutrient for immune function, skin health, and iron absorption.
Antioxidants: Limes are packed with antioxidants, including flavonoids and limonoids, which help protect cells from damage caused by free radicals.
Fiber: The fiber in limes, particularly the pectin, contributes to digestive health and can help lower cholesterol levels.

Comparing Lime to Other Protein Sources

To put the protein content of a lime into perspective, it's helpful to compare it with foods that are actually considered good sources of protein. A person aiming for adequate protein intake would need to consume a variety of foods, not rely on a single fruit. For instance, a person would have to eat an impractical number of limes to equal the protein in one small serving of chicken or lentils.

Is Lime a Good Source of Protein? Comparative Table


Food Item (Approximate Serving Size)	Protein Content	Notes
One Medium Lime (67g)	~0.5g	High in Vitamin C and antioxidants, but minimal protein.
One Large Egg (50g)	~6g	An excellent source of complete protein.
1/2 Cup Lentils (cooked)	~9g	Great plant-based protein and fiber source.
3 oz Chicken Breast	~26g	A lean and complete protein source.
1/2 Cup Greek Yogurt	~11g	Rich in protein and probiotics.

Why We Need Protein and Where to Find It

Protein is a crucial macronutrient composed of amino acids that are vital for building and repairing tissues, making enzymes and hormones, and supporting immune function. While limes play a beneficial role in a balanced diet, they cannot fulfill this fundamental requirement.

For those seeking reliable protein sources, both animal-based and plant-based options are widely available and far more effective. Animal products like meat, fish, eggs, and dairy offer complete proteins, containing all nine essential amino acids. Plant-based sources such as legumes, nuts, seeds, and whole grains provide protein, though combining a variety can ensure a full spectrum of amino acids.

The Importance of a Balanced Diet

Focusing on one food for all your needs, especially for a macronutrient, is often a misconception. A healthy diet emphasizes balance and variety. Limes are a valuable part of this approach, but for reasons entirely unrelated to protein content. For example, the vitamin C in limes helps the body absorb iron from plant-based sources, demonstrating how different foods work synergistically.

By incorporating a mix of fruits, vegetables, lean proteins, and whole grains, you ensure your body receives a wide range of nutrients. Limes are best utilized for their flavor, antioxidant properties, and high vitamin C to complement a diet rich in other, more substantial protein sources. A squeeze of lime in your meal or drink is a great way to add flavor and a vitamin boost, but it's not a shortcut to meeting your protein goals.

Conclusion: Limes for Flavor, Not for Protein

In conclusion, while limes possess many impressive health benefits and are a fantastic addition to any healthy diet, they are definitively not a good source of protein. With their true strengths lying in high levels of vitamin C and antioxidants, limes are best enjoyed for flavor enhancement and their role in a well-rounded nutritional plan. To meet daily protein needs, it is essential to incorporate a diverse range of protein-rich foods from both plant and animal sources.

For more information on balanced diets, explore reliable resources like the Harvard T.H. Chan School of Public Health's nutrition guides.

Frequently Asked Questions

One medium-sized lime, approximately 67 grams, contains a minimal amount of protein, typically around 0.5 grams.

The best sources of protein include lean meats, poultry, fish, eggs, dairy products, and plant-based options like legumes, nuts, and seeds.

No, citrus fruits in general are not considered a good source of protein. They are primarily valued for their vitamin C content, fiber, and other micronutrients.

The main nutritional benefit of limes is their high vitamin C and antioxidant content, which boosts immunity and protects against cell damage.

No, vegetarians and vegans must rely on other plant-based foods like legumes, tofu, nuts, and seeds to meet their protein requirements, as fruits do not provide sufficient amounts.

No, lime juice contains even less protein than the whole fruit. The protein content is concentrated in the fruit's pulp and zest, and is still very low overall.

While most fruits are low in protein, some, like avocado, have slightly more, but none are comparable to traditional protein sources like meat or legumes.