Home Ingredients Advantra Z® (Bitter Orange p-Synephrine — Nutratech)
EnergyMetabolic Health

Advantra Z® (Bitter Orange p-Synephrine — Nutratech)

Citrus aurantium
Evidence Level
Limited
1 Clinical Trial
3 Documented Benefits
2/5 Evidence Score

Advantra Z® is a branded bitter orange (Citrus aurantium) extract standardized for p-synephrine, a mild stimulant alkaloid used as an ephedra-free thermogenic. Made by Nutratech, it is promoted as a thermogenic, but human evidence is limited: the one randomized trial cited here (generic p-synephrine, not Advantra Z) found no significant change in fat oxidation or energy expenditure, and no weight-loss trial supports it. It is a stimulant and is commonly combined with caffeine.

Studied Dose Commercial fat-burners commonly supply about 50 mg p-synephrine per day. The randomized trial cited here used a single acute dose of 3 mg/kg (roughly 150 to 210 mg) before exercise.
Active Compound Citrus aurantium (bitter orange) extract standardized to p-synephrine, a protoalkaloid that mildly stimulates beta-3 adrenergic receptors.

Benefits

Fat oxidation during exercise

Evidence here is mixed and rests on a surrogate marker, not weight loss. Some earlier small studies in men reported higher fat oxidation during low-intensity exercise, but the randomized crossover trial cited on this page, in 18 healthy women, found no significant effect of acute p-synephrine on fat oxidation, energy expenditure, heart rate or blood pressure.

Supported by Trial 1

Modest metabolic boost

Effects on metabolic rate are small and inconsistent. In the randomized trial cited here, p-synephrine raised resting body temperature slightly but did not significantly increase energy expenditure during exercise, and no trial has shown it produces weight loss.

Supported by Trial 1

Ephedra-free stimulation

p-Synephrine is a bitter orange stimulant marketed as an ephedra replacement. In the single trial cited here it did not significantly raise heart rate or blood pressure at its dose, but it is most often stacked with caffeine in real-world fat-burner formulas, and that combination can raise heart rate and blood pressure. Its cardiovascular safety when combined with caffeine is not settled.

Supported by Trial 1

Mechanism of action

1

Beta-3 adrenergic activity

p-Synephrine preferentially stimulates beta-3 adrenergic receptors on fat cells, promoting lipolysis and thermogenesis with relatively little cardiovascular stimulation.

2

Metabolic rate support

By nudging sympathetic tone, it slightly increases energy expenditure and fat use, particularly when combined with exercise.

Clinical trials

1
p-Synephrine and Fat Oxidation — RCT
PubMed

Randomized double-blind crossover study of generic p-synephrine (not Advantra Z) on fat oxidation rate during exercise of increasing intensity in 18 healthy women; a null result. (Gutierrez-Hellin et al. 2022, Nutrients)

18 healthy recreationally active women.

In 18 healthy active women, acute p-synephrine (3 mg/kg before exercise) did not significantly change fat oxidation rate, energy expenditure, heart rate or blood pressure versus placebo; only resting body temperature rose slightly. This trial used generic p-synephrine, not the Advantra Z brand.

Side effects and drug interactions

Common Potential side effects

As a stimulant it does not suit everyone; the single cited trial found no heart rate or blood pressure change at its dose, but this is not established, particularly when stacked with caffeine.
High doses or stacking with caffeine may raise heart rate or cause jitteriness.
Can cause restlessness or headache in sensitive individuals.

Important Drug interactions

MAO inhibitors — avoid combining with sympathomimetics.
Stimulant medications and high-dose caffeine — additive stimulation; use caution.
Blood pressure or heart medications — consult a doctor before use.

More Energy Ingredients

Energy
Caffeine
Caffeine, a natural stimulant found in coffee, tea, and other plants, is commonly suppleme…
Energy
Iron
Iron is an essential mineral best known for its central role in making hemoglobin, the pro…
Energy
Ferrous Sulfate
Ferrous sulfate is the most common, cheapest, and longest-established oral iron form — rec…
Energy
Riboflavin
Riboflavin (vitamin B2) is an essential water-soluble vitamin central to energy production…

Explore Other Ingredients

Cardiovascular
Beetroot
Beetroot is a vegetable rich in dietary nitrate, which the body converts into nitric oxide…
Cognitive
PQQ (Pyrroloquinoline Quinone)
Pyrroloquinoline quinone (PQQ) is a redox-active coenzyme that behaves as an antioxidant i…
Cognitive
Rhodiola Rosea
Rhodiola rosea is an adaptogenic herb traditionally used in cold northern regions to comba…

Frequently asked questions about Advantra Z® (Bitter Orange p-Synephrine — Nutratech)

What is Advantra Z?

Advantra Z® is a branded bitter orange (Citrus aurantium) extract standardized for p-synephrine, a mild stimulant alkaloid used as an ephedra-free thermogenic. Made by Nutratech, it is promoted as a thermogenic, but human evidence is limited: the one randomized trial cited here (generic p-synephrine, not Advantra Z) fo…

What is Advantra Z used for?

Advantra Z is researched primarily for Energy and Metabolic Health. Evidence here is mixed and rests on a surrogate marker, not weight loss. Some earlier small studies in men reported higher fat oxidation during low-intensity exercise, but the randomized crossover trial cited on this page, in 18 healthy wom…

What is the recommended dosage of Advantra Z?

The clinically studied dose is Commercial fat-burners commonly supply about 50 mg p-synephrine per day. The randomized trial cited here used a single acute dose of 3 mg/kg (roughly 150 to 210 mg) before exercise. Always follow the product label and check with a healthcare provider for personal advice.

Is Advantra Z safe, and does it have side effects?

For most healthy adults, Advantra Z is well tolerated at studied doses. Reported effects can include: As a stimulant it does not suit everyone; the single cited trial found no heart rate or blood pressure change at its dose, but this is not established, particularly when stacked with caffeine. High doses or stacking with caffeine may raise heart rate or cause jitteriness. It may also interact with some medications. Advantra Z is not right for everyone, so check with a healthcare provider first if you are pregnant or breastfeeding, have a medical condition, or take prescription medication.

Does Advantra Z interact with any medications?

Possible interactions include: MAO inhibitors — avoid combining with sympathomimetics. Stimulant medications and high-dose caffeine — additive stimulation; use caution. If you take prescription medication, check with a pharmacist or doctor before using it.

How strong is the scientific evidence for Advantra Z?

NutraSmarts rates the evidence for Advantra Z as Limited (2 out of 5). It is backed by 1 clinical trial and 1 cited reference summarized on this page. A higher rating reflects more, larger, and better-designed human studies.

References(1 citations)

Evidence ratings on NutraSmarts are based on the totality of human clinical research, with emphasis on randomized controlled trials, meta-analyses, and systematic reviews. The references below directly support claims made throughout this page.

  1. Gutierrez-Hellin J, Aguilar-Navarro M, Ruiz-Moreno C, et al. Effect of p-Synephrine on Fat Oxidation Rate during Exercise of Increasing Intensity. Nutrients. 2022;14(20):4352..PubMedUsed to support: Randomized double-blind crossover trial in 18 healthy active women: acute p-synephrine (3 mg/kg) did not significantly change fat oxidation, energy expenditure, heart rate or blood pressure during exercise. This is generic p-synephrine, not the Advantra Z brand.