Citrus Aurantium – BITTER ORANGE

Written by admin

November 12, 2025

PARTS USED:

  • Whole fruit
  • Leaves and Flowers

USES:

This is one of the botanicals that works best as aromatherapy and/or inhalation therapy. There are many studies that have shown the positive effects of Neroli oil (from the flower buds; expensive) on mood, blood pressure, GI symptoms, pain, and inflammation. For many of its uses, the essential oil is a key component for this plant, so if you need the oil component it is important to ensure it makes it into your remedy – as a tincture, as a steeped tea (covered), as a steam distillation, or via an essential oil diffuser. Pettigrain oil is extracted from leaves and young shoots.

Antispasmodic/Anodyne

Antioxidant

  • Often higher in peel than pulp
  • Peel constituents higher in tincture than tea; pulp is higher in tea than tincture

Anti-inflammatory – high Vitamin C content

Antiseptic (Essential oil)

Pesticide – for mosquitos and small flies

Neuro – Most of the neuro benefits are from the essential oils, either captured with steam, or via aromatherapy

  • Insomnia, fatigue
  • Relaxing nervine
  • Sedative
  • Antidepressant
  • Anticonvulsant
  • Headaches
  • Anxiety – great for pre-op anxiety

Cardiovascular – Neroli oil works best here

  • Decreases palpitations
  • Negative chronotrope
  • Positive inotrope and vasoconstrictor
    • Increases blood pressure
    • Good for cardiogenic shock and CHF
  • Astringent
    • Stops bleeding
    • Preserves fluid volume – good for hypovolemic shock, dehydration
  • Controls cholesterol

Respiratory

  • Relaxes bronchial smooth muscle – asthma, bronchitis, cough

GI

  • Carminative
  • Promotes gastric mucus production and supports integrity of gastric mucosa
  • Laxative
  • Astringent – reduces diarrhea
  • Anti-obesity agent
    • Thermogenic – increases metabolic rate
    • Reduces fat accumulation
  • Reduced liver fibrosis (animal studies)
  • Hepatoprotective against chemically-induced liver necrosis (ie Tylenol overuse, alcohol)
  • Bitter
  • Appetite suppressant, but can also stimulate the appetite

MS

  • Improves athletic performance
    • Increased reps/weights/distance – allows you to train harder
    • Note: Considered a stimulant – banned in most sports
  • Aromatherapy has a calming effect on muscle contractions post-workout

Integumentary

  • High vitamin C content – good for wound healing, collagen formation
  • Pimples, acne, bacterial and fungal infections

Endocrine

  • May help lower blood glucose levels
  • Fruit and juice may be useful in hypothyroidism (animal studies)

Reproductive

  • Antispasmodic
    • Dysmenorrhea
    • PMS
      • Aromatherapy used over two cycles reduced PMS in young girls, particularly the mental symptoms, such as irritability, anxiety, depression (studies)
    • Labour pains (tea compress placed on back of neck – study)

Immune

  • Antibacterial – all Gram-positive and Gram-negative bacteria (tincture and tea forms of leaves, plus essential oil of leaves and fruit)
    • Staph aureus, Listeria, Klebsiella, Salmonella, E.coli
  • Antiviral – notably Rotavirus
  • Antifungal

Oncology

  • Promotes production of Interleukins and Tumor Necrosis Factor
    • Helps with cell cycle arrest
    • Prevents cell infiltration
    • Best on lung carcinomas
  • Apoptosis of colon cancer cells and leukemia cells

PREPARATION:

  • Infusion
  • Tincture

Note that Citrus is typically used in small, synergistic amounts in formulas, as opposed to being the primary herb.

            SIDE EFFECTS AND TOXICITY:

            • Avoid use of essential oils in pregnancy or lactation
            • Do not combine with caffeine
            • Oils can cause skin sensitivity to UV light and sunlight
            • The juice and fruit is not recommended:
              • If taking opioids – can increase BP and cause irregular heartbeat
              • If taking decongestants
              • If client has hypertension or dysrhythmias
              • If client has glaucoma

              MISCELLANEOUS:

              • Used as a flavouring agent for Curaçao and Grand Marnier
              • Bitter orange oil is also used as a flavouring or additive for:
              • Preservatives
              • Candy
              • Desserts
              • Sauces, marinades, and chutneys
              • Salad dressing
              • Fermented wine
              • Medications
              • Used in India to treat malaria
              • Contains P-synephrine
                • Can increase bp, heart rate
                • Can cause heart attacks and stroke if overused, or in clients with a predisposition
                • When used in recommended amounts, studies show it is safe; however, supplements containing Citrus have been banned in the USA
                • Also found in other fruits and juices, such as mandarins and clementines
                • Banned in many sports
              • Used in skin care, perfumery

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