Dr. Grey AI

Jojoba

Jojoba is a desert shrub native to the American Southwest whose seeds produce a unique liquid wax (not technically an oil) widely used in cosmetics and skincare. Topically, jojoba is used for moisturizing and skin health. Oral jojoba has been investigated for appetite suppression due to simmondsin content, but this use is NOT recommended due to safety concerns (potential toxicity). NO GRADED OUTCOMES. The topical cosmetic use is safe and well-established; oral consumption for weight loss is potentially unsafe and not recommended.

Quick Answer

What it is

Jojoba is a desert shrub native to the American Southwest whose seeds produce a unique liquid wax (not technically an oil) widely used in cosmetics and skincare. Topically, jojoba is used for moisturizing and skin health.

Key findings

  • Grade D: Inflammation (Topical)
  • Grade D: Skin Hydration
  • Grade D: Wound Healing

Safety

  • Oral jojoba has been investigated for appetite suppression due to simmondsin content, but this use is NOT recommended due to safety concerns (potential toxicity).
  • IMPORTANT: Oral jojoba consumption for appetite suppression is NOT recommended due to potential toxicity from simmondsin and related compounds.
ℹ️ Quick Facts: Jojoba

Quick Facts: Jojoba

  • Best Evidence:Grade D
  • Conditions Studied:3
  • Research Outcomes:7
  • Key Effect:Aging
Outcomes by grade:
A0
B0
C0
D7
3 conditions · 7 outcomes

Detailed Outcomes

|
D
Inflammation (Topical)
In rodent models, jojoba liquid wax reduced carrageenin-induced paw edema, prostaglandin E2 levels, croton oil-induced ear edema, and LPS-induced nitric oxide and TNF-alpha release. In an ex vivo human skin organ culture model, jojoba wax reduced LPS-induced IL-6, IL-8, and TNF-alpha secretion by approximately 30%, with emulsified preparations achieving anti-inflammatory efficacy comparable to dexamethasone.
moderate↓Improves
D
Skin Hydration
A small double-blind RCT found that a formulation containing 1.25% hydrolyzed jojoba esters plus glycerol significantly reduced transepidermal water loss (TEWL) compared to glycerol alone at both 8 and 24 hours post-application (P < 0.05). A dermatology review further supports jojoba's moisturizing and skin-barrier properties due to its structural similarity to human sebum.
small↑Improves
D
Wound Healing
In vitro, jojoba liquid wax accelerated wound closure in human HaCaT keratinocytes and dermal fibroblasts with extremely low cytotoxicity, acting through calcium-dependent PI3K-Akt-mTOR and p38/ERK1/2 MAPK signaling pathways. Jojoba also stimulated collagen I production in fibroblasts. A dermatology review corroborates wound healing as a potential application.
small↑Improves
D
Antiviral Activity (HSV-1)
In vitro, four commercial jojoba wax preparations demonstrated significant antiviral activity against Herpes Simplex Virus type 1 (HSV-1) with an EC50 of approximately 0.96 µg/mL, confirmed by plaque reduction assays, RT-PCR, and immunocytochemistry. The antiviral effect was independent of simmondsin content. No antibacterial or antifungal activity was observed.
moderate↓Improves
D
Collagen & Hyaluronic Acid Synthesis
In an ex vivo human skin organ culture model, topical jojoba wax enhanced synthesis of pro-collagen III and hyaluronic acid. Separately, in vitro work showed jojoba liquid wax stimulated collagen I production in human dermal fibroblasts. These findings suggest potential anti-aging skin effects, though no human clinical trials have been conducted.
small↑Improves
D
Appetite Suppression (Oral - Safety Concerns)
In a controlled animal study, jojoba meal containing simmondsin (a cyanoglycoside) demonstrated satiating effects in dogs. A separate mouse study showed that orally administered jojoba wax is mostly excreted with minimal absorption. IMPORTANT: Oral jojoba consumption for appetite suppression is NOT recommended due to potential toxicity from simmondsin and related compounds.
small↓Improves
D
Antioxidant Status
In male albino rats, oral jojoba oil co-administration with the pesticide fipronil significantly enhanced antioxidant enzyme activities (SOD, CAT) and glutathione levels while reducing oxidative stress markers, compared to fipronil alone. This is a single animal toxicology study and the antioxidant effects were demonstrated in the context of toxicant-induced oxidative stress, not baseline supplementation.
small↑Improves

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