Essential Nose Orange
Genus Citrus
The orange family spans a remarkable aromatic range across different parts of the same tree: cold-pressed peel oils (sweet orange, bitter orange) are dominated by limonene — often exceeding 90% of composition — while steam-distilled neroli from C. aurantium flowers is instead rich in linalool and offers a delicate, deeply floral character, and petitgrain from the leaves and twigs bridges the two with a woody-green freshness. A preclinical study demonstrated that C. aurantium essential oil produces anxiolytic-like effects mediated via 5-HT₁A serotonin receptors following repeated treatment.[1]
Sweet Orange
Citrus sinensis
- Also Known As
- Orange, Sweet Orange Peel
- Family
- Citrus
- Perfumery Note
- Top
- Intensity
- Medium
- Extraction
- Cold Pressed
- Plant Parts
- Fruit peel
- Origins
- Brazil, USA, Italy
- Effect
- Uplifting & Energizing
- Aroma
- Citrus, Sweet, Fruity
- Applications
- Aromatherapy, Perfumery, Bath & Body, Culinary, Cleaning, Candles & Soap
- Price
- $$$$The most produced essential oil in the world; a massive byproduct of the juice industry
Sweet orange oil, cold-pressed from the ripe peel of Citrus sinensis, consists almost entirely of limonene (90-95%), giving it a bright, clean citrus sweetness that is softer and rounder than bitter orange. Limonene modulates monoamine neurotransmitter pathways; animal studies demonstrate that inhalation restores depression-induced behavioural changes and reduces HPA-axis hyperactivity.[2] In a controlled human study, volunteers exposed to sweet orange aroma before an anxiogenic procedure showed no significant rise in state anxiety, subjective tension, or heart rate, providing direct clinical support for its traditional use as a calming aromatic.[3]
Neroli
Citrus aurantium
- Also Known As
- Orange Blossom, Bitter Orange Flower
- Family
- Floral
- Perfumery Note
- Middle
- Intensity
- Medium
- Extraction
- Steam Distillation
- Plant Parts
- Blossoms
- Origins
- Tunisia, Morocco, France
- Effect
- Calming & Relaxing, Romantic & Sensual
- Aroma
- Floral, Citrus, Fresh
- Applications
- Aromatherapy, Perfumery, Skincare, Bath & Body
- Price
- $$$$Steam-distilled from hand-picked orange blossoms; thousands of petals produce only a tiny drop of oil
Neroli is steam-distilled from the blossoms of bitter orange (Citrus aurantium var. amara) and is among the most prized aromatics in perfumery, distinguished by a rich floral-citrus character built on linalool (25-35%), linalyl acetate, and the uniquely floral indole. Its anxiolytic effects are among the most clinically documented of any essential oil: a double-blind placebo-controlled trial in 140 patients with acute coronary syndrome found that inhaled neroli significantly reduced anxiety scores compared to placebo.[4] A randomised controlled trial in labouring women confirmed that neroli inhalation produced significantly lower perceived anxiety at all measured stages of labour.[5]
Petitgrain
Citrus aurantium
- Also Known As
- Petitgrain Bigarade, Bitter Orange Leaf
- Family
- Citrus
- Perfumery Note
- Top
- Intensity
- Medium
- Extraction
- Steam Distillation
- Plant Parts
- Leaves, Twigs
- Origins
- Paraguay, France, Tunisia
- Effect
- Balancing, Calming & Relaxing
- Aroma
- Citrus, Woody, Herbaceous
- Applications
- Aromatherapy, Perfumery, Skincare, Bath & Body
- Price
- $$$$Distilled from mandarin tree leaves; distinct from the peel oil
Petitgrain is steam-distilled from the leaves and twigs of bitter orange (Citrus aurantium var. amara) and bridges the aromatic world between bright citrus peel oils and the floral depth of neroli, with a woody-green-herbaceous character anchored by linalyl acetate (45-60%) and linalool. The dominant ester-alcohol pairing confers a calming quality: a controlled human study found that inhaling petitgrain oil improved task performance in university staff, attributing the effect to autonomic rebalancing driven by linalyl acetate, linalool, and myrcene.[6] Seasonal analysis of the leaf oil confirms that linalyl acetate content peaks in autumn and that the oil also carries meaningful antioxidant activity.[7]
Bitter Orange
Citrus aurantium var. amara
- Also Known As
- Seville Orange, Sour Orange
- Family
- Citrus
- Perfumery Note
- Top
- Intensity
- Medium
- Extraction
- Cold Pressed
- Plant Parts
- Fruit peel
- Origins
- Italy, Spain, Tunisia
- Effect
- Balancing, Focus & Clarity, Uplifting & Energizing
- Aroma
- Citrus, Bitter, Fresh
- Applications
- Aromatherapy, Perfumery, Culinary
- Price
- $$$$Peel is a byproduct of bitter orange processing for food and liqueur industries; lower demand compared to sweet orange keeps the price modest
Bitter orange peel oil is cold-pressed from the outer rind of Citrus aurantium var. amara and, like sweet orange, is limonene-dominant (85-95%), but carries a sharper, more resinous bitterness from trace sesquiterpenes. Uniquely among the three bitter-orange-derived oils, the peel oil has been investigated for gastric tissue effects: rat models show that both the essential oil and its principal component d-limonene significantly accelerate healing of induced ulcers, with cure rates of 44% and 56% respectively, mediated through VEGF-driven angiogenesis and increased mucus secretion.[8] Phytochemical profiling further confirms significant antioxidant, anticholinesterase, and antidiabetic enzyme-inhibitory activities.[9]
References
- [1]Citrus aurantium L. essential oil exhibits anxiolytic-like activity mediated by 5-HT(1A)-receptors and reduces cholesterol after repeated oral treatment — Costa CAR, Cury TC, Cassettari BO, et al. BMC Complementary and Alternative Medicine, 2013
- [2]Antidepressant-like Effect of Citrus sinensis (L.) Osbeck Essential Oil and Its Main Component Limonene on Mice — Zhang L-L, Yang Z-Y, Fan G, Ren J-N, Yin K-J, Pan S-Y. Journal of Agricultural and Food Chemistry, 2019
- [3]Effect of sweet orange aroma on experimental anxiety in humans — Goes TC, Antunes FD, Alves PB, Teixeira-Silva F. Journal of Alternative and Complementary Medicine, 2012
- [4]Citrus aurantium Aroma for Anxiety in Patients with Acute Coronary Syndrome: A Double-Blind Placebo-Controlled Trial — Moslemi F, Alijaniha F, Naseri M, Kazemnejad A, Charkhkar M, Heidari MR. Journal of Alternative and Complementary Medicine, 2019
- [5]The Effectiveness of Neroli Essential Oil in Relieving Anxiety and Perceived Pain in Women during Labor: A Randomized Controlled Trial — Scandurra C, Mezzalira S, Cutillo S, Zapparella R, Statti G, Maldonato NM, Locci M, Bochicchio V. Healthcare (Basel), 2022
- [6]Aromatherapy Improves Work Performance Through Balancing the Autonomic Nervous System — Huang L, Capdevila L. Journal of Alternative and Complementary Medicine, 2017
- [7]Season's variation impact on Citrus aurantium leaves essential oil: chemical composition and biological activities — Ellouze I, Abderrabba M, Sabaou N, Mathieu F, Lebrihi A, Bouajila J. Journal of Food Science, 2012
- [8]Healing actions of essential oils from Citrus aurantium and d-limonene in the gastric mucosa: the roles of VEGF, PCNA, and COX-2 in cell proliferation — Moraes TM, Rozza AL, Kushima H, Pellizzon CH, Rocha LRM, Hiruma-Lima CA. Journal of Medicinal Food, 2013
- [9]Metabolic profiling and enzyme inhibitory activity of the essential oil of Citrus aurantium fruit peel — Ashmawy NS, Nilofar N, Zengin G, Eldahshan OA. BMC Complementary Medicine and Therapies, 2024