What is Citrus Aurantium Extract?

Citrus Aurantium Extract is a standardized extract from bitter orange (Citrus aurantium). It is commonly used for weight management and energy support due to its synephrine content.

What are the potential benefits of Citrus Aurantium Extract?

It may modestly support weight management by increasing metabolic rate and may provide a temporary energy boost. Effects vary by person and product formulation.

What is a typical dosage for Citrus Aurantium Extract?

Common supplemental amounts are around 100–200 mg per day, depending on standardization and synephrine content. Follow the product label and consider medical guidance if you have health conditions.

What are the main risks and side effects of bitter orange (synephrine)?

Synephrine can raise heart rate and blood pressure and may increase the risk of cardiovascular side effects, especially in sensitive individuals. Risk may be higher when combined with other stimulants.

Who should avoid Citrus Aurantium Extract or use caution?

People with heart disease, high blood pressure, arrhythmias, or anxiety disorders should use caution or avoid it. It may also interact with stimulant medications and other caffeine-containing products.

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Citrus Aurantium
Extract

Mixed study results·5/10

A higher score indicates better study conditions, but not necessarily effectiveness.

Standardized extract of bitter orange, mainly used for weight management and energy support due to its synephrine content, but carries cardiovascular risks.

Exercise Performance Respiratory Health Energy Support Weight Management

dose range

100–200 mg

Often divided into 2 doses per day

Consumption

Take orally with or without food; avoid taking close to bedtime due to potential stimulant effect.

Not fat-soluble.

Best time

Best taken in the morning and/or pre-workout; avoid late-day dosing to reduce risk of sleep disturbance.

Description

Citrus Aurantium Extract, also called bitter orange extract, is derived from the Citrus aurantium fruit and is commonly marketed for weight loss and athletic performance. Its primary active component is synephrine, a compound similar to ephedrine. Use of this supplement is controversial due to potential stimulant effects and safety concerns, especially for those with heart conditions.

benefits

Main effects with level of evidence

Mixed

Note on evidence

Some studies support modest weight loss and performance effects, but results are inconsistent and safety concerns are present, especially regarding cardiovascular risk.

May support weight management

Mixed

Citrus Aurantium Extract may modestly increase metabolic rate and promote fat loss, especially when combined with diet and exercise.

Particularly relevant for: adults interested in weight management

2 · PubMed - Bitter Orange and Weight Reduction 4 · NIH ODS - Dietary Supplements for Weight Loss 5 · Examine.com - Bitter Orange 7 · Cochrane - Herbal Medicines for Weight Loss in Adults

Potential to enhance exercise performance

Limited

Its stimulant properties may temporarily increase energy and improve anaerobic performance; however, evidence and effects are variable between individuals.

Particularly relevant for: athletes · individuals seeking energy support

3 · PubMed - Acute Effects on Power Output and Hormonal Response 5 · Examine.com - Bitter Orange

May offer mild relief of nasal congestion

Limited

Traditionally used for respiratory health, there is limited modern evidence supporting bitter orange for temporary relief of nasal congestion.

Particularly relevant for: individuals with mild respiratory congestion

1 · WebMD - Bitter Orange

Safety & Information

Important safety information & known risks

For educational purposes only • not medical advice

Safety concerns mainly involve cardiovascular stimulation, particularly in sensitive groups or if taken with other stimulants or MAOIs.

warning notices

Can raise blood pressure and heart rate, especially in those with pre-existing conditions.
Linked to rare cases of severe cardiovascular events, including stroke and heart attack, mainly when combined with stimulants.
Not recommended for individuals with heart disease, hypertension, arrhythmias, or for pregnant and breastfeeding women.
Possible side effects include nervousness, insomnia, and anxiety.
Avoid use if you have cardiovascular diseases, high blood pressure, or arrhythmias.
Do not use during pregnancy or breastfeeding.
Avoid combining with MAO inhibitors due to risk of severe hypertension.
Use caution when combining with caffeine; monitor for increased heart rate or blood pressure.
Discontinue use and seek medical attention if experiencing chest pain, palpitations, or severe dizziness.

Known interactions with medications

MAO inhibitors
stimulant drugs

Contraindications / special precautions

Cardiovascular disease
Hypertension
Arrhythmia
Pregnancy
Breastfeeding

interactions

Important interactions between active ingredient ↔ supplement / medication / food

Citrus Aurantium Extract may interact with medications and other stimulants, increasing cardiovascular and hypertensive risks.

Combining with MAO inhibitors can cause severe or dangerous hypertension.

drug · MAO inhibitors

AvoidStrong

Why

Synephrine can potentiate hypertensive effects when combined with MAOIs.

recommendation

Do not use Citrus Aurantium Extract with MAO inhibitors.

4 · NIH ODS - Dietary Supplements for Weight Loss 8 · US FDA - Health Risks of Weight Loss Products Containing Synephrine

Combined stimulant effects when taken with caffeine may increase cardiovascular risks.

nutrient · Caffeine

CautionModerateCaffeine

Why

Both substances stimulate the central nervous system, which may amplify heart rate and blood pressure increases.

recommendation

Use caution and monitor for adverse effects.

4 · NIH ODS - Dietary Supplements for Weight Loss 5 · Examine.com - Bitter Orange

mechanisms of action

Brief explanations of how it works

Adrenergic stimulation via synephrine

Synephrine, the primary active constituent, acts as a mild stimulant—mainly on the beta-3 adrenergic receptors—enhancing thermogenesis and lipolysis, which can lead to modest increases in metabolism and energy expenditure.

2 · PubMed - Bitter Orange and Weight Reduction 5 · Examine.com - Bitter Orange