Science
Mechanism of Action
This ingredient, or its extract, is abundant in antioxidants such as kaempferol and vitamins A and C, which actively neutralize free radicals and mitigate oxidative stress, thereby helping to preserve collagen integrity. Its anti-inflammatory properties are beneficial for soothing reactive skin conditions like rosacea, eczema, and psoriasis. Functioning as a humectant, it effectively draws and locks in moisture, significantly boosting skin hydration and reinforcing the epidermal barrier. Furthermore, it exhibits antibacterial activity against Propionibacterium acnes, supports mild exfoliation to clear pores and shed dead skin cells, promotes enhanced cellular activity for improved elasticity, and can inhibit melanocytes for a more even skin tone, all while aiding in maintaining optimal skin pH.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 A 1% concentration of Stevia Rebaudiana Leaf Extract in a gel formulation demonstrated a 20% improvement in skin hydration after 28 days compared to untreated skin, proving three times more effective than glycerin as a moisturizer.
- 02 A cream containing 5% stevia leaf extract effectively mitigated collagen degradation in rat skin exposed to UVB radiation.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
As a dry powder, Stevia Rebaudiana Leaf/Stem Powder maintains stability for at least one year at ambient temperatures under controlled humidity. In aqueous formulations, its stability is optimal within a pH range of 4 to 8, with a noticeable decrease in stability observed below pH 2 and with increasing temperatures.
Safety
Safety Profile
While highly purified steviol glycosides are FDA GRAS for food, crude Stevia leaf and extracts, including Stevia Rebaudiana Leaf/Stem Powder, lack sufficient toxicological data for GRAS food additive classification. However, for cosmetic applications, it is generally considered safe. There have been no reported food allergies linked to high-purity steviol glycosides since 2008, and SkinSAFE categorizes it with 'no penalty' across all sensitive skin criteria. Animal studies on Stevia rebaudiana extract suggest low acute and subchronic toxicity, with no evidence of genotoxicity or teratogenicity.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Stevia Rebaudiana Leaf/Stem Powder is a valuable multi-functional ingredient, offering clinically supported hydration and collagen protection, alongside anti-inflammatory, antibacterial, and mild exfoliating benefits suitable for all skin types.
Related
Similar Ingredients
Finding similar ingredients…