| Niacinamide |
Niacinamide |
Barrier support Brightening |
Helps support the skin barrier, reduces transepidermal water loss, improves the appearance of uneven tone, and can help minimize the appearance of enlarged pores and excess sebum. |
2–5% is commonly used; higher levels may be selected for specific formulas after tolerance testing. |
Water-soluble; easy to incorporate into the water phase. |
Approximately pH 4–8. |
Generally stable and easy to source. Control residual nicotinic acid because it may cause flushing or irritation. Request assay, microbiological, heavy-metal, and residual-solvent documentation where applicable. |
Serums, lotions, creams, toners, cleansers, and scalp-care products. |
| L-Ascorbic Acid |
Ascorbic Acid |
Antioxidant Brightening |
Provides antioxidant protection and helps improve the appearance of uneven skin tone and dullness; supports normal collagen-related skin processes. |
5–20% in many topical formulations. |
Water-soluble; requires an acidic system for effective use. |
Typically pH 2.5–3.5 for low-pH formulas. |
Highly sensitive to oxygen, light, heat, water, and metal ions. Prefer opaque, air-restrictive packaging and low-oxygen processing. Evaluate color change and potency over shelf life. |
Low-pH serums, ampoules, masks, and treatment creams. |
| 3-O-Ethyl Ascorbic Acid |
3-O-Ethyl Ascorbic Acid |
Brightening Antioxidant |
Used to improve the appearance of uneven tone and provide antioxidant support, with greater formulation flexibility than pure ascorbic acid. |
1–3% is commonly used, depending on the supplier specification and formula design. |
Water-compatible; actual solubility depends on the grade and solvent system. |
Often formulated around pH 4–6. |
Confirm identity, purity, particle size, recommended dissolution method, and stability data. Protect from prolonged heat, strong light, and incompatible oxidizing conditions. |
Serums, emulsions, lotions, masks, and brightening treatments. |
| Retinol |
Retinol |
Skin renewal Anti-wrinkle care |
Supports the appearance of smoother skin texture and reduced appearance of fine lines through retinoid-based skin renewal activity. |
Approximately 0.1–1%; select the level according to regulatory requirements, consumer tolerance, and product positioning. |
Oil-soluble; commonly delivered in an emulsion, anhydrous system, or encapsulated format. |
Generally compatible with mildly acidic to near-neutral systems; confirm with the selected delivery system. |
Very sensitive to light, oxygen, and heat. Use stabilized grades, antioxidants, airless or opaque packaging, and validated potency testing. Retinoid restrictions and labeling requirements differ by market. |
Night creams, facial oils, emulsions, and targeted treatment products. |
| Salicylic Acid |
Salicylic Acid |
Exfoliation Blemish care |
Helps exfoliate the surface of the skin and supports the appearance of clearer pores and smoother texture. |
Common cosmetic use is approximately 0.5–2%, subject to local regulations and product category. |
Limited water solubility; may require suitable solvents, solubilizers, or suspension technology. |
Often formulated in an acidic range, commonly around pH 3–4. |
Verify regional restrictions, maximum permitted levels, warning statements, and prohibited product categories. Assess irritation potential, crystal formation, and preservative compatibility. |
Rinse-off cleansers, exfoliating toners, gels, spot treatments, and body-care products. |
| Tranexamic Acid |
Tranexamic Acid |
Tone evening Spot appearance care |
Used in topical products to help improve the appearance of uneven skin tone and discoloration-related concerns. |
Commonly used at approximately 2–5% in topical cosmetic formulas. |
Water-soluble; suitable for the water phase. |
Usually compatible with mildly acidic to near-neutral systems, approximately pH 5–7. |
Confirm cosmetic status and permitted claims in each target market. Check dissolution, crystallization risk, compatibility with acidic actives, and long-term color stability. |
Serums, lotions, creams, masks, and targeted tone-care products. |
| Alpha-Arbutin |
Alpha-Arbutin |
Brightening Tone care |
Helps improve the appearance of uneven skin tone and the visible intensity of dark spots. |
Up to approximately 2% in facial products, subject to local regulatory review and supplier guidance. |
Water-soluble; dissolve completely in the aqueous phase. |
Commonly used around pH 3.5–6.5. |
Protect from excessive heat and unsuitable pH conditions. Verify purity, hydroquinone limits where relevant, and stability under the complete formula’s temperature and light conditions. |
Serums, creams, lotions, masks, and targeted spot-care products. |
| D-Panthenol |
Panthenol |
Humectant Soothing support |
Attracts and retains water, helping improve skin hydration and comfort; also supports conditioning benefits in hair and scalp products. |
Approximately 0.5–5% in leave-on skincare; product-specific levels vary. |
Water-soluble; suitable for the water phase. |
Generally compatible with pH 4–8. |
Available as liquid or powder grades. Select the appropriate grade for processing, verify assay and optical purity, and protect formulas from prolonged high-temperature exposure. |
Moisturizers, after-sun products, barrier creams, toners, hair conditioners, and scalp products. |
| Hyaluronic Acid |
Sodium Hyaluronate / Hyaluronic Acid |
Hydration Film forming |
Forms a moisturizing film and helps improve the appearance of skin plumpness, smoothness, and surface hydration. |
Approximately 0.05–1%, depending on molecular weight, concentration, and desired sensory profile. |
Water-soluble; hydrate gradually in the water phase to avoid lumping. |
Generally compatible with pH 4–8. |
Source by molecular-weight distribution, viscosity, microbial quality, and origin documentation. Check electrolyte tolerance, hydration time, and viscosity changes during processing and storage. |
Serums, gels, emulsions, sheet masks, eye products, and after-sun care. |
| Ceramide NP |
Ceramide NP |
Barrier reinforcement Emollience |
Helps support the skin barrier and reduce the feeling of dryness when used in a suitable lipid system. |
Often used at approximately 0.05–0.5%; follow supplier recommendations and the active concentration of the supplied blend. |
Oil-dispersible or supplied in a pre-dispersed system; requires suitable lipid technology. |
Generally compatible with pH 4–8. |
Confirm whether the material is pure ceramide or a standardized blend. Evaluate dispersion quality, crystallization, heat history, and compatibility with cholesterol and fatty-acid components. |
Barrier creams, facial moisturizers, body lotions, hand creams, and sensitive-skin products. |
| Azelaic Acid |
Azelaic Acid |
Tone care Texture refinement |
Helps improve the appearance of uneven tone, blemish-prone skin, and rough or uneven skin texture. |
Commonly used at approximately 5–10% in cosmetic products; higher levels may be regulated differently by market. |
Limited water solubility; commonly formulated as a suspension, emulsion, or with specialized delivery technology. |
Often formulated around pH 4–5.5, depending on the system. |
Control particle size, sedimentation, grittiness, and recrystallization. Confirm local regulatory classification and claims requirements, especially for high-use-level products. |
Suspension creams, gels, emulsions, serums, and targeted facial treatments. |
| Bakuchiol |
Bakuchiol |
Antioxidant Skin-smoothing care |
Used in cosmetic products aimed at improving the appearance of skin smoothness, texture, and visible signs of aging. |
Commonly used at approximately 0.5–1%, depending on the supplier specification and formula design. |
Oil-soluble; suitable for oil phases, emulsions, or anhydrous products. |
Compatible with many cosmetic pH ranges; confirm compatibility with the complete formula. |
Verify botanical source, assay, allergen information, residual solvents, oxidation stability, and color. Protect from excessive light and oxygen and use suitable antioxidant protection. |
Facial oils, serums, emulsions, night creams, and eye-care products. |
| Caffeine |
Caffeine |
Eye-area care Antioxidant support |
Used in eye and facial products to support a refreshed appearance and help reduce the visible look of puffiness associated with tired-looking skin. |
Approximately 0.1–3%, depending on the product type and sensory target. |
Water-soluble; dissolve fully in the water phase with controlled heating if necessary. |
Generally compatible with pH 4–8. |
Check dissolution at the intended use level and storage temperature. Request identity, assay, microbiological, and residual-solvent documentation where relevant. |
Eye gels, eye creams, facial serums, body products, and scalp-care formulas. |
| Copper Tripeptide-1 |
Copper Tripeptide-1 |
Conditioning Skin appearance care |
Used in advanced skincare formulas intended to support a smoother, more conditioned, and healthier-looking appearance. |
Use levels vary widely by supplier potency and active content; follow the standardized supplier recommendation. |
Water-compatible; usually added during cool-down to reduce processing stress. |
Typically formulated around pH 5–7, subject to supplier data. |
Peptide quality is highly dependent on assay, copper content, pH, temperature, and chelating ingredients. Avoid unnecessary exposure to strong acids, strong bases, and high heat; request stability data for the complete formula. |
Serums, eye products, creams, ampoules, and premium treatment formulas. |