Science
Mechanism of Action
This extract primarily functions through its phytoestrogen content, notably diosgenin, which can interact with skin to support improved thickness, firmness, and the synthesis of collagen and elastin, thereby addressing age-related declines in skin vitality. It provides robust antioxidant protection, neutralizing free radicals from environmental stressors and preventing the degradation of structural proteins. Its anti-inflammatory properties help to calm redness and swelling, aiding in the recovery of irritated skin conditions. Furthermore, it acts as a moisturizer by reinforcing the skin's barrier function, contributes to evening out skin tone by modulating melanin production, and exhibits antimicrobial activity against both gram-positive and gram-negative bacteria. Components like allantoin may also promote cellular regeneration and wound healing.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 A 10% dilution of the extract was non-irritating to both intact and abraded skin in dermal irritation tests, contrasting with undiluted extract which caused irritation.
- 02 Topical application of a wild yam cream for three months in healthy premenopausal women showed no significant side-effects or metabolic/endocrinal alterations.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The safety and efficacy of the extract are closely linked to its chemical profile, specifically an expected upper limit of 3.5% diosgenin. It is typically prepared by extraction with eluants like oleyl alcohol, followed by precipitation and redissolution. Common solvents for dilution include propylene glycol, butylene glycol, glycerin, water, vegetable oil, or alcohol.
Safety
Safety Profile
The CIR Expert Panel deems Dioscorea Villosa (Wild Yam) Root Extract safe for cosmetic use, provided extracts maintain a similar chemical profile with diosgenin levels not exceeding 3.5%. While undiluted extract can be irritating to skin, a 10% dilution has shown no irritation. Undiluted extract exhibits only mild eye irritation. The stated maximum concentration of 0.3% applies to non-spray moisturizing products, updated from a previous 15% (0.5% plant solids) guideline in 1999.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Dioscorea Mexicana Root Extract is a valuable multi-functional ingredient that supports skin health through its phytoestrogen, antioxidant, and anti-inflammatory properties, making it suitable for a wide range of skin types and concerns with a low risk of irritation at appropriate concentrations.
Related
Similar Ingredients
Finding similar ingredients…