Science
Mechanism of Action
This extract operates through several pathways: it acts as a potent antioxidant, neutralizing free radicals with its high concentration of phenolic compounds such as myricitrin, gallic acid, and quercetin. Its anti-inflammatory effects stem from suppressing itch-related cytokines (IL-6, IL-31) and modulating microglial activation. It also stabilizes mast cells to reduce histamine release, addressing both histamine-dependent and independent itching. For skin protection, it counteracts oxidative stress and reduces collagen degradation from UVB exposure. Furthermore, certain fractions can inhibit tyrosinase activity and melanin production by downregulating key enzymes (MITF, TRP-1, TRP-2), suggesting a role in skin brightening. It is also believed to support skin hydration by promoting ceramide production and maintaining the moisture barrier.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 Topical application of Diospyros lotus leaf extract (DLE) significantly reversed UVB-induced skin damage in mice, inhibiting oxidative stress, reducing collagen degradation, and decreasing mast cell and neutrophil infiltration. The results were comparable to L-ascorbic acid.
- 02 An ethyl acetate fraction of DLE at 100 mg/mL inhibited cellular tyrosinase activity and melanin content in B16 cells, and reduced levels of microphthalmia-associated transcription factor (MITF), tyrosinase, tyrosinase-related protein-1 (TRP-1), and TRP-2, suggesting anti-melanogenesis effects.
- 03 DLE and its main component, myricitrin, showed potent antipruritic effects in mice by modulating mast cell activity, reducing histamine release, and affecting central itch signaling pathways.
- 04 DLE and grapefruit stem extract synergistically ameliorated atopic dermatitis-like skin lesions in mice by suppressing infiltration of mast cells, reducing scratching behavior, clinical scores, ear and dorsal skin thickness, and serum IgE and IL-4 production.
- 05 DLE and its main component myricitrin inhibited itch‑related IL‑6 and IL‑31 by suppressing microglial inflammation and microglial‑mediated astrocyte activation.
Transparency
Dusting Analysis
Diospyros Lotus Leaf Extract is supported by several mechanistic and in vivo (animal) studies demonstrating a wide array of beneficial skin effects, including antioxidant, anti-inflammatory, anti-itch, UVB protection, and skin brightening properties. Its multi-target action indicates it is a genuinely active ingredient rather than merely a 'dusting' inclusion for marketing.
The Formula
Formulation
Stability
While specific optimal pH for the overall extract's stability in cosmetic formulations is not broadly documented, its phenolic compounds are best extracted with polar solvents such as water and ethanol. Some enzymatic activities related to its components show optimal conditions around pH 5.5.
Synergies
- Grapefruit Stem Extract (synergistically ameliorates atopic dermatitis-like lesions)
- Myricitrin (main component responsible for many benefits, including antipruritic and anti-inflammatory effects)
Safety
Safety Profile
Diospyros lotus leaf extract has not been specifically evaluated by the Cosmetic Ingredient Review (CIR) or the Scientific Committee on Consumer Safety (SCCS). While other 'lotus' species have been reviewed, Diospyros lotus is distinct. Animal studies have shown no obvious toxic effects at high oral doses (up to 5 g/kg b.wt for a 70% methanolic extract), suggesting a favorable safety profile in preclinical models. However, comprehensive human safety data, including sensitization and irritation potential, are not readily available.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Diospyros Lotus Leaf Extract is a valuable botanical ingredient with a broad spectrum of research-backed benefits in animal and in vitro models, particularly for its antioxidant, anti-inflammatory, antipruritic, and skin brightening properties, warranting further exploration in human clinical studies.
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