The least acidic fruits you can eat are melons, dates, and coconut. Cantaloupe and honeydew sit around pH 6.3, close to neutral, while dates reach pH 6.2 to 6.4. Most other fruits fall somewhere on the acidic side of the scale, but the degree varies widely. A lemon registers around pH 2, while a banana lands near pH 4.5. That range matters if you’re dealing with acid reflux, mouth ulcers, or a sensitive stomach.
How Fruit Acidity Is Measured
The pH scale runs from 0 (most acidic) to 14 (most alkaline), with 7 as neutral. Pure water is 7. Almost every fruit falls below 7, which technically makes it acidic. But when people search for “non-acidic” fruits, they usually mean fruits that are mild enough not to trigger heartburn, irritate the throat, or sting sensitive teeth. In practice, fruits with a pH above 5 or 6 are the ones that feel gentle.
It’s worth knowing that a fruit’s pH (its chemical acidity in your mouth and stomach) is different from what it does to your body after digestion. More on that below.
The Lowest-Acid Fruits
These fruits have pH values closest to neutral and are the gentlest choices for people avoiding acidity.
- Cantaloupe: pH around 6.3. One of the mildest fruits available, and high in water content, which helps dilute stomach acid.
- Honeydew melon: pH around 6.3. Very similar to cantaloupe in acidity and equally well tolerated.
- Watermelon: Slightly more acidic than cantaloupe but still mild, with the added benefit of being over 90% water.
- Dates: pH 6.2 to 6.4. Among the least acidic fruits you can find, fresh or dried.
- Coconut: Fresh coconut meat and coconut water are close to neutral and rarely cause irritation.
Johns Hopkins Medicine specifically lists bananas and melons as alkaline foods recommended for people managing acid reflux. Watermelon also appears on their list of high-water-content foods that help weaken stomach acid.
Moderately Acidic Fruits
These fruits aren’t as gentle as melons, but they’re far milder than citrus. Many people with reflux tolerate them well, especially when ripe.
- Bananas: pH 4.5 to 4.7. Technically acidic by the numbers, but widely considered one of the safest fruits for sensitive stomachs. Their soft, starchy texture coats the esophagus rather than irritating it.
- Papaya: Generally falls in the low-acid range and contains a natural enzyme that aids protein digestion, which some people find soothing.
- Pears: pH 3.6 to 4.0. More acidic than you might expect, but their mild flavor and fiber content make them a reasonable option for many people.
- Figs: Fresh figs are relatively low in acid and have a naturally sweet, mild profile.
Bananas are an interesting case. Their pulp is acidic, with measurable amounts of citric, malic, and ascorbic acids that actually increase as the fruit ripens. Yet they’re still one of the most commonly recommended fruits for reflux. The reason is partly texture and partly the way bananas behave in the stomach: they don’t splash or linger the way citrus juice does.
Fruits That Are Most Acidic
If you’re trying to avoid acidity, these are the fruits to limit or pair with other foods:
- Lemons and limes: pH around 2.0 to 2.5. The most acidic common fruits.
- Grapefruits: pH around 3.0 to 3.5.
- Oranges and tangerines: pH around 3.0 to 4.0.
- Pineapple: pH around 3.2 to 4.0, with the added effect of a protein-digesting enzyme that can irritate the mouth.
- Tomatoes: pH around 4.0 to 4.5. Botanically a fruit and a common reflux trigger, especially in sauce form.
Why Ripeness Changes Acidity
A fruit’s pH isn’t fixed. It shifts as the fruit ripens, though not always in the direction you’d expect. Bananas, for example, actually become slightly more acidic as they go from green to spotted yellow, because ripening increases their organic acid content. The sugar content also rises, which is why ripe bananas taste sweeter even though they’re chemically no less acidic.
For most fruits, though, the perception of acidity drops as sugar increases. A perfectly ripe pear tastes milder than an underripe one, even if the pH difference is small. If you’re sensitive to acid, choosing fully ripe fruit and avoiding anything underripe is a simple way to reduce irritation.
Chemical Acidity vs. What Happens After Digestion
Here’s something that surprises most people: nearly every fruit, even highly acidic ones like lemons, has an alkalizing effect on your body after digestion. Scientists measure this using a score called the Potential Renal Acid Load (PRAL), which estimates whether a food makes your urine more acidic or more alkaline. A negative score means the food is alkalizing.
Virtually all fruits score negative. Bananas come in at -5.5 per 100 grams, oranges at -2.7, strawberries at -2.2, and watermelon at -1.9. Raisins are the most alkalizing food measured in one major study, at -21.0 per 100 grams. This happens because fruits are rich in potassium, magnesium, and other minerals that produce alkaline byproducts when metabolized.
This distinction matters depending on why you’re looking for low-acid fruits. If you’re managing reflux or protecting tooth enamel, the pH of the fruit in your mouth and stomach is what counts, and you want melons, dates, and bananas. If you’re interested in the overall acid-alkaline balance of your diet (sometimes discussed in the context of kidney health or bone density), then all fruits are already working in your favor regardless of how sour they taste.
Practical Tips for Reducing Fruit Acidity
You don’t have to give up your favorite fruits entirely if they’re on the acidic side. A few adjustments can reduce the impact. Eating acidic fruit with a meal rather than on an empty stomach buffers the acid with other food. Pairing fruit with something alkaline, like yogurt or oatmeal, also helps. Blending fruit into a smoothie with milk or a milk alternative dilutes the acid concentration that contacts your teeth and esophagus.
If tooth enamel is your concern, avoid brushing your teeth immediately after eating acidic fruit. Acid temporarily softens enamel, and brushing within 30 minutes can wear it away. Rinsing your mouth with plain water right after eating is a better approach.
For reflux, portion size often matters more than which fruit you pick. A small serving of pineapple with a meal may cause no issues, while eating half a watermelon on an empty stomach could still trigger discomfort simply from the volume. Starting with the lowest-acid options (melons, dates, bananas) and testing your tolerance from there gives you the most useful information about what your body handles well.