Product Description
Kojic Acid: The Secret to Glowing Skin
Kojic acid is a bioactive compound derived from Aspergillus fungal fermentation. It serves as a scientifically validated brightening and antioxidant agent in cosmetic formulations. At concentrations of 0.5–2 %, it offers the following key benefits:
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Pigmentation correction: inhibits tyrosinase, leading to a visibly even tone, diminished freckles, melasma, sun spots.
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Antioxidant defense: scavenges free radicals, delays skin aging.
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Barrier reinforcement: enhances hydration retention and lipid layer stability.
Applications across cosmetic products
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Brightening serums and concentrates: 1–2 % kojic acid, complemented by 4–5 % niacinamide, boosts luminosity and clarity.
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Cream-gel emulsions: Oil-in-Water systems with 4–6 % emulsifiers (PEG‑40 hydrogenated castor oil + glyceryl stearate) ensure smooth skin feel.
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Peel‑off masks: formulate with 1 % kojic, 0.5 % Matrixyl 3000 (palmitoyl tripeptide-1/dipetide-4), 0.2 % low-MW hyaluronic acid, and 0.1 % lemon essential oil for brightening and firmness.
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Toners and mists: contain 0.3–0.8 % kojic acid in a hydrating base (glycerin, sorbitol) for post‑cleanse rejuvenation.
Sample DIY “Bright & Smooth” cream-serum (50 ml)
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Water phase: deionized water 30 ml, glycerin 3 ml, propylene glycol 2 ml, panthenol 1 ml.
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Oil phase: caprylic/capric triglyceride 5 ml, squalane 2 ml, carrot seed oil 1 ml.
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Emulsifier: ceteareth‑20 & cetearyl alcohol (4 % total, ~2 ml).
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Actives & peptides: Matrixyl 3000 — 1 % (~0.5 ml), low/high MW hyaluronic acid — 1 % (~0.5 ml).
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Kojic acid: 1.5 % (~0.75 ml stock solution).
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Surfactant: Decyl Glucoside 1 % (~0.5 ml) for texture balance.
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Preservative: Phenoxyethanol + Ethylhexylglycerin 1 % (~0.5 ml).
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pH adjuster: citric acid — target pH ~5.5.
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Fragrance: 0.2 % light signature scent.
Preparation steps
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Heat both oil and water phases separately to ~70 °C.
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Emulsify oil into water under high‑speed mixing.
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Cool mixture to ~40 °C, then add peptides, hyaluronic acid, kojic acid.
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Adjust pH, incorporate preservative and fragrance at ~35 °C.
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Package in sterile airless container; store in cool, dark conditions.
Compatibility and synergy
— Do not exceed 2 % concentration; combine effectively with niacinamide or vitamin C.
— Sensitive skin: start at 0.5 %, incorporate ceramides (1 %).
— Day routine: always pair with SPF 30+ to preserve results.
— Frequency: 2–3 times per week in evening routine.
Ideal skin types and usage
Suitable for oily, combination, mature, pigmented skin types. Benefits visible after 4–6 weeks of regular use—with reduced melanin spots, smoother texture, radiant tone. A single 30 ml bottle provides ample coverage for several weeks.
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