Jojoba (Simmondsia chinensis): Benefits, Dosage, Safety & Evidence

Questions fréquentes

How does jojoba oil work on skin?

Jojoba oil contains wax esters that closely resemble human sebum, allowing it to penetrate the skin barrier effectively. These esters form a protective occlusive layer that prevents transepidermal water loss while delivering vitamin E and phytosterols with antioxidant and anti-inflammatory properties. This unique composition enables jojoba to balance oil production without clogging pores, making it suitable for both dry and acne-prone skin types. Evidence level: C.

Does jojoba oil interact with any medications?

Jojoba oil has no known significant drug interactions when applied topically. Because it is not systemically absorbed in meaningful amounts, it does not interfere with most medications. However, applying it simultaneously with other topical treatments may affect their absorption. For oral jojoba supplements, consult a healthcare provider as limited safety data exists. Evidence level: Traditional use supports its safety profile.

How much jojoba oil should I use for dry skin?

For dry skin, apply jojoba oil topically as needed, typically 2-3 drops for the face or a quarter-sized amount for larger body areas. Massage gently until absorbed. Use once or twice daily, preferably after bathing when skin is slightly damp to lock in moisture. Adjust the amount based on individual skin needs and absorption. Evidence level: C.

Is jojoba oil safe during pregnancy and breastfeeding?

Jojoba oil is considered safe for topical use during pregnancy and breastfeeding. It is not systemically absorbed and poses minimal risk to mother or baby. Pregnant women should avoid oral jojoba supplements. As with any new skincare product, perform a patch test first and consult a healthcare provider if you have specific concerns. Evidence level: Traditional use supports safety.

Can jojoba oil help with acne?

Jojoba oil may help manage acne due to its similarity to human sebum, which signals the skin to reduce natural oil production. Its non-comedogenic nature means it will not clog pores, while its anti-inflammatory and antimicrobial properties may support healing. Some small studies suggest improvement in acne lesions, though more rigorous research is needed. Evidence level: C.

What are the side effects of jojoba oil?

Jojoba oil is generally well-tolerated with rare side effects. Occasional skin reactions may include mild irritation, redness, or contact dermatitis in sensitive individuals. True jojoba allergy is uncommon but possible. Discontinue use if any adverse reaction occurs. Oral consumption of jojoba oil is not recommended as it contains compounds that may cause digestive issues. Evidence level: Traditional use and safety data.

Fiche d'information compilée à partir de PubMed

Cette fiche a été compilée à partir de résumés PubMed (NIH) avec l'assistance d'une IA. Chaque affirmation factuelle est citée par un article PubMed réel (voir la liste des sources). Elle n'a pas encore été révisée par un humain — confirmez auprès d'un professionnel de santé avant utilisation.

Compilé à partir de 30 articles PubMed · modèle : gemma4:31b

Résumé

Jojoba (Simmondsia chinensis) is a drought-resistant perennial plant whose seed oil, composed primarily of liquid wax esters, is widely used for its moisturizing, anti-inflammatory, and antioxidant properties [PMID:24442052, PMID:39524627, PMID:38695844].

Contexte

Jojoba is a dioecious, long-lived, drought-resistant perennial shrub native to North America [PMID:24442052, PMID:38695844, PMID:37726703]. It is primarily cultivated for the production of liquid wax esters extracted from its seeds [PMID:24442052, PMID:32195345].

Usages traditionnels

In folk medicine, jojoba seeds and oil have been used to treat skin and scalp issues, superficial wounds, sore throats, obesity, and cancer, as well as to enhance immunity and promote hair growth [PMID:38695844, PMID:34073772].

Composés actifs

Jojoba oil consists of approximately 98% wax esters, specifically long monounsaturated esters of long-chain alcohols and fatty acids [PMID:34073772, PMID:38695844, PMID:24442052]. Other bioactive components include simmondsins, polyphenols, flavonoids, and lignans [PMID:33812189, PMID:25312177].

Mécanisme d'action

Jojoba oil acts as an emollient that hydrates the skin, prevents moisture loss, and maintains suppleness [PMID:39524627]. It may reduce the secretion of pro-inflammatory cytokines and enhance the synthesis of pro-collagen III and hyaluronic acid in human skin [PMID:38344180].

Preuves cliniques

Preuve BSkin Hydration

Hydrolyzed jojoba esters combined with glycerol provide a substantial long-acting 24-hour skin moisturizing effect [PMID:19146603]

Preuve DHerpes Simplex 1 (HSV-1)

Jojoba wax significantly attenuated HSV-1 plaque formation with high potency (EC50 of 0.96 µg/mL) [PMID:34641603]

Preuve DHepatotoxicity (Rat Model)

Jojoba seed cake extracts (simmondsin-rich and simmondsin-hydrolyzed) expressed hepatoprotective activity against paracetamol-induced toxicity in rats [PMID:35797942]

Preuve DCisplatin-induced Nephrotoxicity/Hepatotoxicity (Rat Model)

S. chinensis hydro-ethanolic extract was studied for synergistic protective effects with vitamin E against cisplatin-induced toxicity [PMID:41035979]

Preuve CGeneral Dermatology

Jojoba is reported to have anti-inflammatory effects and is used for skin infections, skin aging, acne, psoriasis, and wound healing [PMID:24442052, PMID:38344180, PMID:34073772]

Sécurité et effets indésirables

Jojoba oil is considered safe for topical application in ex-vivo human skin organ culture models [PMID:38344180].

Synthèse des preuves

The evidence is primarily based on review articles (Level C) and laboratory/animal studies (Level D), with one small pilot RCT (Level B) regarding skin hydration. There is strong theoretical and preclinical support for its use in dermatology, but limited high-level human clinical trial data.

Sources PubMed

1.PMID: 29280987 (2017) — Anti-Inflammatory and Skin Barrier Repair Effects of Topical Application of Some Plant Oils. · International journal of molecular sciences
2.PMID: 28707186 (2018) — Natural Oils for Skin-Barrier Repair: Ancient Compounds Now Backed by Modern Science. · American journal of clinical dermatology
3.PMID: 33338579 (2021) — Bacterial wax synthesis. · Biotechnology advances
4.PMID: 34957578 (2022) — An updated review on efficacy and benefits of sweet almond, evening primrose and jojoba oils in skin care applications. · International journal of cosmetic science
5.PMID: 39524627 (2024) — A Comprehensive Review of Plant-Based Cosmetic Oils (Virgin Coconut Oil, Olive Oil, Argan Oil, and Jojoba Oil): Chemical and Biological Properties and Their Cosmeceutical Applications.

Jojoba

Sources et citations

Calculer une dose sûre de Jojoba

Karpuravalli

Terminalia Macroptera

Dracaena cinnabari

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Synthèse des preuves

Sources PubMed

Sources gouvernementales

Jojoba

Sources et citations

Calculer une dose sûre de Jojoba

Plantes associées

Karpuravalli

Terminalia Macroptera

Dracaena cinnabari

Questions fréquentes

Résumé

Contexte

Usages traditionnels

Composés actifs

Mécanisme d'action

Preuves cliniques

Sécurité et effets indésirables

Synthèse des preuves

Sources PubMed

Sources gouvernementales