Lime juice is good for you. A single cup delivers about 74 mg of vitamin C, which covers most of an adult’s daily needs, along with nearly 288 mg of potassium, all for roughly 62 calories. It’s a low-sugar, nutrient-dense addition to your diet. That said, its high acidity means there are a few situations where you’ll want to be careful.
Vitamin C: The Main Nutritional Draw
The standout benefit of lime juice is its vitamin C content. Adults need 75 to 90 mg of vitamin C per day (more if you smoke or are pregnant), so a full cup of fresh lime juice gets you most of the way there. Even smaller amounts, like the juice of one or two limes squeezed into water or over food, contribute meaningfully to your daily intake.
Vitamin C is essential for several things your body does every day. It stimulates the production and function of white blood cells, including the neutrophils and lymphocytes that serve as your immune system’s front line. These immune cells actually accumulate vitamin C at high concentrations, which protects them from the oxidative damage they generate while fighting off infections. Vitamin C also increases your body’s production of interferons, proteins that help coordinate the immune response against viruses.
Beyond immunity, vitamin C is required for collagen synthesis. Collagen is the structural protein that keeps your skin firm, your joints flexible, and your wounds healing properly. Without enough vitamin C, collagen production slows, which shows up as slower wound healing and, over time, less resilient skin. Regular intake supports the skin’s ability to repair itself and resist damage from sun exposure and environmental pollution.
Other Nutrients Worth Noting
Lime juice contains about 288 mg of potassium per cup. Potassium helps regulate fluid balance and supports normal blood pressure by counteracting the effects of sodium. Most people don’t get enough potassium in their diet, so every bit helps. Lime juice also contains small amounts of folate and other B vitamins, though not in quantities large enough to make a major dent in your daily requirements.
With only about 4 grams of sugar per cup, lime juice is one of the lowest-sugar fruit juices available. Compare that to orange juice or apple juice, which can contain 20 grams or more per cup. If you’re looking for a way to flavor water or food without adding much sugar, lime juice is a strong option.
How Lime Juice Affects Digestion
For most people, lime juice in moderate amounts is perfectly fine for digestion. The citric acid can even help your body absorb iron from plant-based foods, which is useful if you eat a largely vegetarian diet.
The exception is acid reflux. If you have GERD or frequent heartburn, lime juice can be a trigger. Citric acid irritates the esophagus, which isn’t built to handle acidic substances the way your stomach is. When stomach contents containing citric acid flow back up, they can cause pain and, over time, damage the esophageal lining. Lime juice is specifically listed among citrus juices to avoid if you experience acid reflux regularly.
The Enamel Erosion Trade-Off
The biggest downside of lime juice is what it can do to your teeth. Tooth enamel starts dissolving at a pH below about 5.5, and lime juice, even diluted in water at common household ratios, easily falls into that erosive range. Sipping lime water throughout the day exposes your teeth to repeated acid contact, which can wear down enamel over time.
A few simple habits minimize this risk. Drinking lime water through a straw reduces contact with your teeth. Rinsing your mouth with plain water afterward helps neutralize the acid. Avoid brushing your teeth immediately after drinking something acidic, since softened enamel is more vulnerable to abrasion. Waiting 30 minutes before brushing gives your saliva time to remineralize the tooth surface.
Practical Ways to Get the Benefits
You don’t need to drink cups of straight lime juice to benefit from it. Most people use lime juice in smaller, more practical quantities: a squeeze over tacos, a wedge in sparkling water, a few tablespoons in a salad dressing or marinade. These amounts still contribute vitamin C and potassium to your diet, especially when they’re part of a consistent habit rather than a one-time thing.
Fresh lime juice retains more vitamin C than bottled versions, which lose potency during processing and storage. If you’re buying bottled, check whether it’s been reconstituted from concentrate, as these products often have less nutritional value. Squeezing fresh limes takes a bit more effort but delivers the most benefit per ounce.
Lime juice also works as a functional ingredient in cooking. The acid helps break down proteins in marinades, tenderizing meat. It “cooks” raw fish in dishes like ceviche by denaturing the proteins. And because it adds bright flavor with almost no calories, it’s one of the easiest ways to make healthy food taste better, which matters more than most people realize when it comes to sticking with a good diet.