Science
Mechanism of Action
Humus extract refines skin texture by enhancing kallikrein 5 (KLK5) activity, which boosts skin cell turnover and minimizes the appearance of pores. It contributes to a brighter complexion by chelating copper, a key cofactor for tyrosinase, thereby suppressing melanin production. This ingredient also acts as a gentle exfoliant, promotes new cell growth, provides antioxidant protection against free radicals, and helps shield against UV radiation. Its anti-inflammatory properties calm redness and reduce irritation, while its detoxifying capabilities bind and facilitate the elimination of impurities. Furthermore, it supports the viability of human keratinocytes and improves nutrient absorption.
Research
Clinical Evidence
Medium confidenceN/A
Key findings
- 01 A 4-week study with 10 subjects utilizing a formulation containing humus extract demonstrated a reduction in noticeable pores, improved skin surface smoothness, and increased stratum corneum turnover via enhanced kallikrein 5 (KLK5) activity.
- 02 Topical application of a 0.5% humic acid gel significantly reduced inflammatory cell proliferation and accelerated wound healing in male rats with skin ulcers, confirming anti-inflammatory effects.
- 03 A double-blind, placebo-controlled split-face study with 20 subjects showed that a 0.3% fulvic acid extract effectively reduced the melanin index of age spots, enhanced skin brightness, and diminished wrinkles.
Transparency
Dusting Analysis
Efficacy has been observed with key components (humic and fulvic acids) at functional concentrations of 0.3% and 0.5%. While the exact concentration for the full extract's efficacy isn't specified in all human studies, these component concentrations suggest it is typically used at levels beyond 'dusting' for tangible results.
The Formula
Formulation
Stability
The extract's initial pH of approximately 2.8 requires neutralization to pH 5.0-7.0 using potassium or sodium hydroxide to precipitate and remove iron (Fe(OH)₃), which also mitigates rust odor. Fulvic acid remains soluble across all pH levels, whereas humic acid is soluble in alkaline conditions but precipitates below pH 2. The extract is rich in various minerals, amino acids, sugars, and vitamins. Incorporating a humectant and fermenting the extract can amplify its moisturizing effects and boost the production of beneficial organic acids, amino acids, and vitamins.
Synergies
- Humectants for enhanced moisturizing
- Fermentation for increased organic acids, amino acids, and vitamins
Safety
Safety Profile
Formal regulatory status from CIR, SCCS, or FDA is not yet established for Humus Extract. However, a humus-derived moisturizing liquid has shown no skin irritation or toxicity. Studies on human keratinocytes indicate that humic materials generally increase cell viability and reduce inflammatory cytokines, suggesting a low risk of irritation.
Your Skin
Skin Compatibility
Our Assessment
Verdict
Humus Extract is a valuable, multi-beneficial ingredient backed by studies on its components for improving skin texture, tone, and overall health, with a low risk of irritation.
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