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Moumoujus

DIOSCOREA OPPOSITIFOLIA ROOT.

Valuable / SKIN CONDITIONING

Dioscorea Oppositifolia Root is a botanical extract rich in bioactive compounds such as diosgenin and allantoin, providing comprehensive benefits including antioxidant protection, anti-inflammatory action, and enhanced skin hydration. It is particularly effective in improving skin suppleness, elasticity, and promoting healthy cell renewal, making it ideal for dry and sensitive skin conditions.

Summary

Antioxidant Anti-inflammatory Moisturizer/humectant Skin-identical ingredient Soothing Promotes cell renewal Wound healing Keratolytic effect Barrier strengthening

Science

Mechanism of Action

This root extract exerts its beneficial effects through a synergistic blend of bioactive compounds, including the steroidal saponin diosgenin, polysaccharides, polyphenols, and allantoin. Diosgenin and other saponins act as potent antioxidants, mitigating oxidative stress from environmental aggressors, and possess intrinsic anti-inflammatory properties that help to visibly reduce skin inflammation. Allantoin, a naturally occurring constituent, actively promotes accelerated cell regeneration and supports wound healing, alongside providing a mild keratolytic effect. Collectively, these components fortify the skin's natural protective barrier, thereby enhancing moisture retention, diminishing flaking, and yielding a smoother, softer, and more resilient complexion.

Research

Clinical Evidence

Low confidence
Effective range N/A
Optimal

N/A

Key findings

  1. 01 In vitro and preliminary research indicates Dioscorea oppositifolia exhibits antioxidant, anti-inflammatory, and antibacterial properties, alongside stimulating cell renewal.
  2. 02 Bioactive proteins extracted from the root have demonstrated the capacity to stimulate estrogen and boost estradiol synthesis.
  3. 03 Diosgenin, a principal compound, has shown concentration- and cell type-dependent anticancer activity in certain studies. However, the current data emphasizes the necessity for further human clinical trials and comprehensive bioavailability studies to fully ascertain its therapeutic potential for topical skin application.

Transparency

Dusting Analysis

Not commonly dusted

The Formula

Formulation

Solubility
Water
Optimal pH 1 – 10
0 7 14

Stability

Yam Soluble Protein (YSP), a key component from Dioscorea opposita (a synonym for D. oppositifolia), exhibits robust solubility and stability across a wide pH spectrum, from 1.0 to 10.0. While solubility is minimal at its isoelectric point of pH 3.5, it significantly increases away from this, reaching 56.45% at pH 1.0 and 86.99% at pH 10.0, indicating optimal performance in alkaline conditions.

Conflicts

  • High concentrations of salt (e.g., 0.5 M and 1.0 M NaCl) can negatively impact the solubility, emulsifying activity, and overall emulsion stability of Yam Soluble Protein.

Safety

Safety Profile

CIR Status
Not reviewed
Sensitization risk Low

While Dioscorea Oppositifolia Root itself has not undergone review by the Cosmetic Ingredient Review (CIR) Expert Panel, a related species, Dioscorea Villosa (Wild Yam) Root Extract, was concluded to be safe for cosmetic use. This safety assessment was contingent upon extracts maintaining a similar chemical profile, specifically with an expected upper limit of 3.5% diosgenin. Historically, Dioscorea Villosa extract was reported in moisturizing formulations at up to 15% (0.5% maximum solids) in 1999, and at 0.3% in non-spray moisturizing products in 2022. Undiluted Dioscorea Villosa extract was rated as 'irritant' to rabbit skin, though a 10% dilution was found to be non-irritating.

Your Skin

Skin Compatibility

Yes Normal
Yes Dry
No Oily
Yes Sensitive
Irritancy Low
Comedogenicity Low

Our Assessment

Verdict

Valuable

Dioscorea Oppositifolia Root is a valuable ingredient, demonstrating significant antioxidant, anti-inflammatory, and moisturizing properties suitable for various skin types, though further direct human clinical efficacy studies would strengthen its profile.

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