Yes, tangerines are acidic. The FDA lists tangerines at a pH of about 3.32 to 4.48 (FDA), which overlaps almost completely with Florida oranges (3.69 to 4.34). So tangerines and oranges are close cousins in acidity, too. Tangerines often taste sweeter, but they still carry the citric acid that gives all citrus its tang.

If you have acid reflux, sensitive teeth, or mouth sores, that acidity matters. This guide explains how acidic tangerines are, how they stack up against oranges, lemons, and other fruits, and how to enjoy them more gently.

Key Takeaways

• Tangerines are acidic, with an FDA pH of about 3.32 to 4.48.
• They’re about as acidic as oranges. Florida oranges measure pH 3.69 to 4.34.
• In one juice study, mandarin juices were slightly less acidic than orange juices, with about 0.8% to 1.2% total acid versus 1.1% to 1.6%.
• They’re far less acidic than lemons and limes, which measure about pH 2.0 to 2.8.
• Tangerines are citrus, a common reflux trigger, so people with GERD should start small.
• They provide 26.7 mg of vitamin C per 100 g, plus some fiber and potassium.

Are Tangerines Acidic? The Short Answer

Yes. Tangerines are citrus fruits, and like all citrus, they’re naturally acidic. Here’s what the data show:

Values vary with variety, ripeness, growing region, and whether the whole fruit or just the juice is tested.

A quick note on names: tangerines, mandarins, and clementines are close relatives, and people often use the names interchangeably. UC Riverside botanist Tracy Kahn explains that “tangerine” was coined for brightly colored sweet mandarins shipped from the port of Tangier (UC Riverside). That’s why the studies below often say “mandarin.”

Are Tangerines More Acidic Than Oranges?

Not really. They’re about the same, and some tangerines are a little milder.

• By pH: The FDA ranges overlap almost entirely: tangerines at 3.32 to 4.48 and Florida oranges at 3.69 to 4.34 (FDA). Tangerines simply have a wider range, so some are sharper and some are gentler than a typical orange.
• By total acid: A Turkish study of authentic citrus juices measured both fruits side by side (Karadeniz, 2004):

The study reported acid in grams per liter; we converted to percent (g/L ÷ 10).

In this study, most mandarin juices were slightly less acidic than the orange juices. Clementine was the mildest, with the highest pH of the group. Minneola, a tangerine hybrid (tangelo) also tested in the study, was the sharpest at pH 3.17 and 1.40% acid.

Why Do Tangerines Taste Sweeter if They’re Just as Acidic?

Flavor depends on the balance of sugar and acid, not acid alone. University of California postharvest experts list a soluble solids-to-acid ratio of 6.5 or higher as part of the maturity standard for mandarins and tangerines, and note that flavor depends on that ratio (Arpaia & Kader, UC Davis).

In other words, a ripe tangerine still has plenty of acid. It just has enough sugar to balance it. That’s why a sweet tangerine can still bother a sensitive stomach.

How Acidic Are Tangerines Compared With Other Citrus?

Tangerines sit at the mild end of the citrus family:

Source: FDA, Approximate pH of Foods and Food Products.

A tangerine around pH 3.9 is roughly 20 to 80 times less acidic than lemon juice or limes, because each step on the pH scale is a tenfold change. The juice study tells the same story: lemon juices there held about 5.3% to 6.4% total acid, roughly five times more than most mandarin juices in the same study (Karadeniz, 2004).

Tangerines are close to kumquats in pH. The big difference is that you peel a tangerine, while you eat a kumquat whole.

How Acidic Are Tangerines Compared to Other Fruits?

Here’s how tangerines compare with other fruits we’ve covered (FDA):

Source: FDA, Approximate pH of Foods and Food Products; passion fruit, guava, starfruit, mangosteen, and longan from the studies and fact sheets cited in our individual fruit guides.

A few takeaways:

• Tangerines are less acidic than lemons, limes, and passion fruit.
• They’re in a similar range to pineapple, mangoes, guava, and starfruit.
• They’re more acidic than mild fruits like mangosteens, lychees, rambutans, and longans.
• Bananas, persimmons, and dragon fruit are gentler picks if you’re acid-sensitive.

For the full list, see our complete guide to acidic foods.

What Makes Tangerines Acidic?

Citric acid is the main acid in most citrus juices, including tangerines (Karadeniz, 2004). The study did find one interesting exception: clementine juice contained more malic acid (12.15 g/L) than citric acid (6.05 g/L). Malic acid is the same acid that gives apples their tartness.

How acidic a tangerine tastes also depends on:

• Ripeness: Less mature fruit has a lower sugar-to-acid ratio, so it tastes sharper.
• Variety: In the juice study, clementine tested mildest, while the Minneola tangelo was sharpest.
• Form: Juice concentrates the acid you take in at once, while whole segments are diluted by the fruit’s pulp and membranes.

Are Tangerines Too Acidic for Acid Reflux?

For some people, yes. The National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK) lists citrus fruits among the foods that may make reflux worse, along with tomatoes, alcohol, chocolate, coffee and caffeine, high-fat foods, mint, and spicy foods (NIDDK). Tangerines are citrus, so they fall into that group.

Still, triggers vary. The American College of Gastroenterology’s 2022 guideline recommends that people with GERD identify their own triggers rather than cutting out every possible food, and avoid eating within 2 to 3 hours of bedtime (Katz et al., 2022). Many people do fine with a few tangerine segments after a meal; others feel the burn right away.

Tips for Eating Tangerines With Reflux

1. Start with a few segments, not a whole bowl.
2. Choose milder varieties. In the juice study, clementines had the highest pH of the mandarins tested.
3. Eat whole segments instead of juice, which delivers more acid at once.
4. Eat them with or after a meal, not on an empty stomach.
5. Pair them with gentle foods, like oatmeal, Greek yogurt, or cottage cheese.
6. Avoid late-night snacking. NIDDK suggests eating meals at least 3 hours before lying down if you have nighttime symptoms (NIDDK).

If tangerines bother you, try lower-acid fruits like bananas, longans, or lychees, and see our list of foods to avoid with GERD. If you have heartburn more than twice a week, trouble swallowing, or symptoms that don’t improve, talk with your doctor.

Are Tangerines Acidic Enough to Harm Your Teeth?

They can contribute to enamel wear if you eat them often. The American Dental Association says how often and how long your teeth are exposed to acid matters most. It recommends eating acidic foods as part of a meal, rinsing with water or having milk or cheese afterward, and waiting about an hour before brushing (American Dental Association). Peeling and nibbling tangerines all afternoon is harder on enamel than eating one with lunch. Our article on whether apples are good for your teeth covers similar questions.

Mouth sores: Mayo Clinic lists spicy or acidic foods among those that can trigger canker sores in some people (Mayo Clinic). Tangerine juice can sting an open sore, so skip them until it heals.

Tangerines and Gastritis

Citrus fruits are often uncomfortable for people with gastritis. If you have gastritis, consider avoiding tangerines until symptoms settle and choosing milder fruits like bananas. Our 7-day meal plan for gastritis has gentler ideas.

Tangerine Nutrition

Per 100 grams of raw tangerines (mandarin oranges), USDA lists (USDA FDC 169105):

A few highlights:

• Vitamin C: 26.7 mg per 100 g, roughly 30% to 36% of the adult daily recommendation of 75 to 90 mg (NIH Office of Dietary Supplements).
• Hydration: At 85% water, tangerines are a juicy, low-calorie snack.
• Sugar: 10.6 g per 100 g. If you’re watching blood sugar, see our guide on whether apples are good for diabetics for general fruit guidance.

Acid-Smart Ways to Enjoy Tangerines

If tangerines agree with you, these ideas pair their tang with gentler ingredients:

• Fruit salads: Add tangerine segments to our citrus salad.
• Candied peel: Try our candied citrus peel or chocolate-dipped candied orange peel with tangerine peel.
• Baking: Swap tangerine zest and juice for the orange in our orange basil scones or dark chocolate orange cupcakes.
• Drinks and desserts: Use tangerine in place of some citrus in our citrus pomegranate mint tea or blood orange and mint granita.
• Curd: Replace some of the fruit in our blood orange curd with tangerine juice. Curd is very acidic, so save it for good stomach days.

The tangerine swaps haven’t been tested in our kitchen, so adjust to taste.

Frequently Asked Questions

Are tangerines acidic or alkaline?

Tangerines are acidic. The FDA lists them at pH 3.32 to 4.48, and mandarin juices in one study measured pH 3.44 to 3.69.

Are tangerines good for acid reflux?

They can trigger symptoms in some people because they’re citrus, which NIDDK lists as a possible reflux trigger. Try a few segments with a meal and stop if they bother you.

Are tangerines, clementines, and mandarins equally acidic?

They’re similar, but not identical. In one juice study, clementine juice had the highest pH (3.69) of the mandarins tested, while the Minneola tangelo was the sharpest (pH 3.17). Variety and ripeness both matter.

Is tangerine juice more acidic than the whole fruit?

The juice has the same acids, but drinking a glass delivers more acid at once than eating a few segments. We couldn’t find a study comparing tangerine juice and whole fruit pH directly.

Are canned mandarin oranges less acidic?

We couldn’t find published pH data for canned mandarin oranges, and the FDA table doesn’t list them. Syrup-packed versions taste sweeter, but sweetness doesn’t remove the fruit’s acid.

Are tangerines healthy?

Yes. Per 100 g, they provide 26.7 mg of vitamin C, 1.8 g of fiber, and 166 mg of potassium for just 53 calories. Their acidity is the main thing to watch if you have reflux or sensitive teeth.

The Bottom Line: Are Tangerines Acidic?

Tangerines are acidic, with an FDA pH of about 3.32 to 4.48, almost the same as oranges. Some varieties, like clementines, run a little milder, while tangelos like Minneola are sharper. All of them are far less acidic than lemons and limes, but more acidic than mild fruits like bananas, lychees, and longans.

For most people, tangerines are a healthy, vitamin C–rich snack. If you have acid reflux, sensitive teeth, or gastritis, start small, eat them with a meal, and switch to gentler fruits if they bother you.

Keep exploring with Are Kumquats Acidic?, Are Limes Acidic?, Is Lemon Juice Acidic?, or our complete guide to acidic foods.

Medical disclaimer: This article is for general information only and isn’t a substitute for professional medical advice. If you have frequent heartburn, GERD, gastritis, or mouth sores that don’t heal, talk with your doctor or a registered dietitian.

References

1. U.S. Food and Drug Administration. Approximate pH of Foods and Food Products. https://riverstonehealth.org/wp-content/uploads/FDA-Approximate-pH-of-Foods.pdf
2. Karadeniz, F. (2004). Main organic acid distribution of authentic citrus juices in Turkey. Turkish Journal of Agriculture and Forestry, 28, 267–271. https://aj.tubitak.gov.tr/agriculture/issues/tar-04-28-4/tar-28-4-8-0310-2.pdf
3. Arpaia, M.L., & Kader, A.A. Mandarin/Tangerine: Recommendations for Maintaining Postharvest Quality. UC Davis Postharvest Technology Center, Perishables Handling Quarterly #98 (1999). https://hortscans.ces.ncsu.edu/uploads/p/r/produce__51a51534157c7.pdf
4. UC Riverside CNAS. “I’ve always wondered… What’s with those little seedless holiday tangerines?” (2019). https://cnas.ucr.edu/media/2019/12/19/ive-always-wondered-whats-those-little-seedless-holiday-tangerines
5. USDA FoodData Central. Tangerines (mandarin oranges), raw (FDC 169105). https://fdc.nal.usda.gov/fdc-app.html#/food-details/169105/nutrients
6. NIH Office of Dietary Supplements. Vitamin C fact sheet. https://ods.od.nih.gov/factsheets/VitaminC-HealthProfessional/
7. NIDDK. Eating, Diet, & Nutrition for GER & GERD. https://www.niddk.nih.gov/health-information/digestive-diseases/acid-reflux-ger-gerd-adults/eating-diet-nutrition
8. Katz, P.O., et al. (2022). ACG Clinical Guideline for the Diagnosis and Management of GERD. Am J Gastroenterol, 117(1), 27–56. https://doi.org/10.14309/ajg.0000000000001538
9. American Dental Association (MouthHealthy). Dietary Acids and Your Teeth. https://www.mouthhealthy.org/all-topics-a-z/dietary-acids-and-your-teeth
10. Mayo Clinic. Canker sore: Symptoms & causes. https://www.mayoclinic.org/diseases-conditions/canker-sore/symptoms-causes/syc-20370615