Science
Mechanism of Action
Lithospermum officinale root extract exerts its effects through a rich profile of bioactive compounds, including shikonin derivatives, polyphenolic acids such as rosmarinic acid, and various flavonoids. These components contribute to its proven antioxidant, anti-inflammatory, and antimicrobial actions. On the skin, it actively promotes regeneration, strengthens the protective barrier by mitigating trans-epidermal water loss (TEWL), and soothes irritation, thereby reducing visible redness. Furthermore, it combats oxidative stress, offers protection against UVB-induced photoaging, and has demonstrated capabilities in regulating sebum production and minimizing the effects of glycation in mature skin.
Research
Clinical Evidence
Medium confidence0.05%-5.5%
Key findings
- 01 Research on the closely related *Lithospermum erythrorhizon* root extract indicates that concentrations in this range improve the skin's barrier function by reducing trans-epidermal water loss (TEWL), provide soothing effects, diminish oxidative stress, and offer protection against UVB-induced photoaging.
- 02 A 28-day study on healthy Asian females utilizing a 5.00% *Lithospermum erythrorhizon* emulsion demonstrated a significant moisturizing effect, increasing skin hydration by up to 11.77% (± 1.18%), and improved skin barrier function, with TEWL values decreasing by up to 7.68% (± 0.79%).
- 03 Topical compositions containing gromwell root extract (*Lithospermum erythrorhizon*) within this range, particularly 0.05%-5.5%, were found to suppress sebum production and effectively minimize glycation in mature skin.
Transparency
Dusting Analysis
The Formula
Formulation
Stability
The extract's intrinsic color is pH-sensitive, appearing red at lower pH levels and transitioning to deep violet/purple above pH 8.0, or blue-magenta in alkaline environments. Hydrolysis upon water exposure can lead to malodor; this can be mitigated through anhydrous formulations or water-in-oil/water-in-silicone emulsification to sequester shikonin naphthoquinones in the external phase.
Conflicts
- Staining of clothing may occur when concentrations are ≥0.10% and the extract reacts with caustic treatments.
- Functional shikonin naphthoquinones exhibit low solubility in conventional polar esters and lipophilic compounds, necessitating proper solubilization techniques to prevent resolidification, precipitation, and polymerization.
Safety
Safety Profile
Lithospermum officinale extract is deemed safe for general cosmetic use, with regulatory bodies recognizing related extracts like Lithospermum erythrorhizon as safe under usage guidelines. While generally well-tolerated, a sensitivity patch test is advisable for individuals with highly reactive skin due to the potential for allergic reactions to plant extracts. Although pyrrolizidine alkaloids are present in the plant, their dermal absorption is documented as poor.
Your Skin
Skin Compatibility
Our Assessment
Verdict
This multifaceted botanical extract offers significant benefits across various skin concerns, including barrier support, hydration, antioxidant protection, and sebum regulation, making it a valuable addition for comprehensive skin health.
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