Citrus Fruits & Orange Juice
Oranges, orange juice and other citrus: what trials and cohort reviews found, why hesperidin supplement trials are a separate question, and grapefruit and medicines.
Content last updated . This page has not been medically reviewed.
Safety first. Natural products can cause side effects and interact with medicines. Read functional food safety before you use anything on this page.
Citrus fruits come from trees in the genus Citrus (family Rutaceae) and include oranges, grapefruit, lemons, limes and mandarins. The part eaten is the juicy fruit; the juice is also drunk. They contain flavanones, plant compounds such as hesperidin. This page looks at the fruit and its juice as foods. It is information only.
Read this first: grapefruit and medicines
The US Food and Drug Administration (FDA) says grapefruit juice and grapefruit can affect how some medicines work. Examples it names include some cholesterol-lowering statins, some blood pressure medicines and some organ-transplant rejection medicines. [1] It says the effect depends on the person, the medicine and the amount, and that grapefruit juice can block an intestinal enzyme called CYP3A4, so more of some drugs enters the blood. [1] For a few other medicines it can have the opposite effect. [1] The FDA adds that Seville oranges (often used for marmalade), pomelos and tangelos might have the same effect as grapefruit juice. [1] (The FDA page was current as of July 2021.)Ask your pharmacist or prescriber whether your medicine is affected, and read the medication guide. See grapefruit and medication interactions and foods and medicine interactions. Never stop a prescribed medicine on your own.
What research shows
| Question | What the source found | Strength of evidence | What was studied |
|---|---|---|---|
| Heart disease and death, whole citrus | A dose-response meta-analysis of 95 prospective studies reported inverse associations between citrus fruit intake and cardiovascular disease and all-cause mortality. [2] | Promising but limited (observational: people who eat citrus differ in many ways) | Whole fruit, eating patterns |
| Blood vessel function | In a small crossover trial of 15 adults with overweight or obesity, 2 weeks of blood orange juice improved flow-mediated dilation compared with a sugar-matched drink; blood pressure and lipids were unaffected. [3] | Promising but limited | Blood orange juice, 15 people, short term |
| Blood pressure and cholesterol with orange juice | A meta-analysis of eight trials in adults with overweight or obesity found a 0.98 mmHg lower systolic pressure and higher HDL cholesterol, with no change in total cholesterol, triglycerides, LDL, glucose, insulin or CRP. [4] | Mixed (very small changes) | Orange juice, adults with overweight or obesity |
| Hesperidin as a supplement | A 2019 meta-analysis (10 trials) found hesperidin supplementation might not improve lipids or blood pressure. [5] A 2024 update (12 trials) found lower LDL and total cholesterol, glucose and some inflammation markers. [6] | Mixed | Hesperidin extracts or purified hesperidin, not fruit |
| Type 2 diabetes and juice | A meta-analysis of 14 cohort studies found non-100% fruit juice associated with a higher diabetes risk (RR 1.15), with no significant association for 100% juice. [7] | Promising but limited (observational) | Juices, mostly in cohorts |
The hesperidin rows concern concentrated supplements or extracts, so they do not tell us what a whole orange does. A result for one form does not transfer to another.
Whole fruit and juice
US dietary guidelines say whole fruits include fresh, canned, frozen and dried forms, and that at least half of fruit should come from whole fruit rather than 100% juice. [8] They note 100% juice without added sugars can be part of a healthy pattern but has less fiber than whole fruit. [8] Drinks labeled "fruit drink" may be mostly water and added sugars, so check the label. See fruit juice vs whole fruit.Other juices and medicines
A review of randomized trials of juices other than grapefruit found that these did not cause severely harmful food-drug interactions, despite sporadic case reports; it listed orange juice among juices that lowered the absorption of several medicines. [9] The review urged pharmacists to screen for juice-drug interactions. [9] One FDA note says an allergy medicine, fexofenadine, may not work as well with orange or apple juice. [1] Ask your pharmacist about your own medicines.Related
Fruit juice vs whole fruit · Polyphenols and flavonoids in foods · Foods for blood pressureHealth connections for Citrus Fruits (overview)
What research links to eating or drinking this food, and how strong the evidence is. Many studies are observational or use juice, powder, oil or extracts rather than the food as eaten; each card says which.
Vitamin C intake and scurvy prevention
Deficiency linkCitrus fruits and juices are among the richest food sources of vitamin C. Scurvy is the severe form of vitamin C deficiency, and eating enough vitamin C-containing food prevents it.
Supplements: Helps only where intake is too low; no good evidence of extra benefit when intake is adequate.
Fiber and everyday nutrition
Established roleWhole citrus gives fiber, potassium, folate and some other nutrients along with vitamin C. Juice has less fiber than whole fruit.
Supplements: This is the normal food role, not a supplement effect.
Heart disease and death (eating patterns)
Preliminary or mixedA meta-analysis of 95 prospective studies reported inverse associations between citrus intake and cardiovascular disease and all-cause death. Observational studies cannot prove cause.
Supplements: Whole-fruit eating patterns; not a supplement result.
Blood vessel function and blood pressure with orange juice
Preliminary or mixedA small crossover trial of blood orange juice improved flow-mediated dilation in 15 adults with overweight or obesity. A meta-analysis of eight orange-juice trials found a very small drop in systolic pressure (0.98 mmHg) and no change in LDL or total cholesterol.
Supplements: Studied with juice, not whole fruit.
Hesperidin supplements and heart risk factors
Preliminary or mixedHesperidin is a citrus flavanone. Supplement trials are mixed: a 2019 meta-analysis found no clear benefit on lipids or blood pressure, a 2024 update found lower LDL and total cholesterol and some other markers.
Supplements: Extracts and purified hesperidin only; results do not transfer to whole fruit.
Fruit juice and type 2 diabetes
Preliminary or mixedA meta-analysis of 14 cohort studies linked non-100% fruit juice to higher type 2 diabetes risk (RR 1.15) and found no significant link for 100% juice. Juice has less fiber than whole fruit.
Supplements: Juice, not whole fruit; association only.
Juice versus whole fruit
Preliminary or mixedUS dietary guidelines say at least half of fruit should come from whole fruit rather than 100% juice. Drinks labeled fruit drink may be mostly water and added sugar.
Supplements: Guideline advice for food patterns, not a treatment.
Connected topics
Open a group to see how each topic connects and how strong the evidence is.
Body systems (5)
- Cardiovascular SystemPreliminary or mixed
Observational and small trial evidence only; hesperidin supplement trials are mixed and are a separate question.
- Heart & CirculationPreliminary or mixed
Observational studies link citrus intake with lower heart disease risk, and small juice trials show tiny changes; this does not prove cause.
- Blood Sugar SupportPreliminary or mixed
Juices (not whole fruit) were linked in cohort studies to type 2 diabetes risk; 100% juice showed no significant link.
- Gut HealthEstablished role
Whole citrus provides dietary fiber; juice has less.
- Immune SupportDeficiency link
Vitamin C from citrus prevents scurvy, the severe deficiency state; there is no good evidence here that citrus boosts immunity when intake is adequate.
Body parts (3)
- HeartPreliminary or mixed
Associations with lower heart disease risk in cohort studies; not proof.
- Blood VesselsPreliminary or mixed
Blood orange juice improved flow-mediated dilation in one small trial of 15 adults.
- SkinDeficiency link
Slow wound healing and bleeding gums are signs of vitamin C deficiency; citrus is a source.
Root causes (3)
- Medication Side EffectsDocumented risk
Grapefruit can change blood levels of some medicines; Seville orange and pomelo might too; orange juice can lower absorption of some.
- Nutrient DeficiencyDeficiency link
Citrus is a rich vitamin C source and eating enough vitamin C prevents scurvy.
- Poor DietEstablished role
Whole fruit, including citrus, is part of a balanced pattern; the guidelines suggest at least half of fruit as whole fruit.
Habits (1)
- Balanced NutritionEstablished role
US dietary guidelines include whole fruit in a healthy pattern and prefer whole fruit over juice for at least half of fruit.
Biomarkers (4)
- Blood GlucosePreliminary or mixed
Orange juice trials found no change in glucose; hesperidin supplement results are mixed.
- CRPPreliminary or mixed
No change in CRP in the orange juice meta-analysis; some inflammation markers fell in the 2024 hesperidin supplement update.
- HDL CholesterolPreliminary or mixed
A meta-analysis of orange juice trials reported higher HDL in adults with overweight or obesity.
- LDL CholesterolPreliminary or mixed
Orange juice trials found no change in LDL; hesperidin supplement trials are mixed (a 2024 update found lower LDL).
Conditions & symptoms (1)
- ScurvyDeficiency link
Scurvy is severe vitamin C deficiency; citrus fruits and juices are among the richest vitamin C foods.
Documented risks and interactions (4)
- Grapefruit and medicine interactions. The FDA says grapefruit juice and grapefruit can change how some medicines work, including some statins, blood pressure medicines and transplant medicines. Seville oranges, pomelos and tangelos might act the same way. Ask a pharmacist or prescriber.
- Other juices and medicine absorption. A review of randomized trials found that juices other than grapefruit did not cause severely harmful interactions, but orange juice lowered the absorption of several medicines. The FDA notes fexofenadine (an allergy medicine) may work less well with orange or apple juice.
- Citrus allergy. Citrus allergy is possible. For trouble breathing or swelling of the face or throat, call 911.
- Washing and food safety. The FDA advises washing whole produce under running water before cutting and says soap or produce wash is not recommended.
Frequently asked questions
Is orange juice healthy?
Trials show small or mixed effects on markers, and 100% juice showed no association with type 2 diabetes in a cohort meta-analysis. Juice has less fiber than whole fruit. [4][7][8]
Can I eat grapefruit with my medicine?
It depends on the medicine. The FDA says to ask your doctor or pharmacist and read the label. [1]
Does orange juice interact with medicines?
Mostly less severely than grapefruit juice, but some juice-drug pairs lower absorption of certain medicines. Ask a pharmacist. [9]
Does hesperidin help blood pressure?
Supplement trials are mixed, and they do not show what fruit does. [5][6]
Does citrus prevent disease?
Not shown. Cohort studies find associations, which cannot prove cause. [2]
More details: evidence, limits and cautions
The details behind this page: cautions, limits of the evidence and where sources disagree. Open any note to read it.
Safety and individual considerations
- Citrus allergy is possible. For trouble breathing or swelling of the face or throat, call 911. See food allergy basics.
- Kidney disease, reflux, tooth enamel and people on potassium-restricted diets: Proper evidence not found in the sources we read for this page (searched PubMed for citrus and reflux). Ask a clinician if this applies to you.
- Wash whole fruit under running water before cutting; the FDA says soap or produce wash is not recommended. [10]
References
- US Food and Drug Administration. Grapefruit Juice and Some Drugs Don't Mix. Content current as of 07/01/2021. Read 2026-10-23.
- Aune D et al. Fruit and vegetable intake and the risk of cardiovascular disease, total cancer and all-cause mortality: a systematic review and dose-response meta-analysis of prospective studies. Int J Epidemiol 2017. PMID 28338764. Abstract read 2026-10-23.
- Li L et al. Blood orange juice consumption increases flow-mediated dilation in adults with overweight and obesity: a randomized controlled trial. J Nutr 2020. PMID 32510144. Abstract read 2026-10-23.
- Li L et al. Does chronic consumption of orange juice improve cardiovascular risk factors in overweight and obese adults? A systematic review and meta-analysis of randomized controlled trials. Food Funct 2022. PMID 36383179. Abstract read 2026-10-23.
- Mohammadi M et al. Hesperidin, a major flavonoid in orange juice, might not affect lipid profile and blood pressure: a systematic review and meta-analysis of randomized controlled clinical trials. Phytother Res 2019. PMID 30632207. Abstract read 2026-10-23.
- Huang H et al. Effects of citrus flavanone hesperidin extracts or purified hesperidin consumption on risk factors for cardiovascular disease: an updated meta-analysis of randomized controlled trials. Curr Dev Nutr 2024. PMID 39279783. Abstract read 2026-10-23.
- Lee CW, Myung SK. Consumption of fruit juice and risk of type 2 diabetes mellitus: a systematic review and meta-analysis of prospective cohort studies. Am J Med 2025. PMID 40393612. Abstract read 2026-10-23.
- US Department of Agriculture and US Department of Health and Human Services. Dietary Guidelines for Americans, 2020-2025. Full text read 2026-10-23.
- Chen M et al. Food-drug interactions precipitated by fruit juices other than grapefruit juice: an update review. J Food Drug Anal 2018. PMID 29703387. Abstract read 2026-10-23.
- US Food and Drug Administration. Selecting and Serving Produce Safely. Read 2026-10-23.