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Salicylic Acid 2% Anhydrous Solution, Gentle Exfoliating Serum for Blemishes
The Ordinary
$7.50
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Phenoxyethanol is a preservative that prevents bacteria, yeast, and mold from growing in skincare products, helping them stay fresh and safe to use. It has been used safely in cosmetics for decades and is effective at very low concentrations.
Benefits
- Prevents microbial contamination and product spoilage
- Broad-spectrum antimicrobial activity against bacteria and yeast
- Minimal impact on beneficial skin bacteria when used at approved levels
Potential concerns
- Rare allergic contact dermatitis in sensitive individuals
- May cause irritation if used in products at concentrations above 1%
Science: The European Scientific Committee on Consumer Safety considers phenoxyethanol safe for all consumers, including children, at concentrations up to 1%. Adverse effects observed in animal studies required exposure levels approximately 200 times higher than those in cosmetic products, and it is classified as one of the most well-tolerated preservatives in cosmetics.
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Pentylene glycol is a lightweight humectant—a ingredient that draws water into the skin to improve hydration and texture. It's commonly used in serums, sunscreens, and moisturizers as a preservative booster and skin-conditioning agent.
Benefits
- Improves skin hydration by attracting moisture
- Lightweight feel, absorbs quickly without heaviness
- Helps preserve product stability and extends shelf life
Potential concerns
- Rare contact allergy reported in sensitive individuals
- Emerging evidence suggests it may be an uncommon cosmetic allergen—if you have sensitive or reactive skin, patch test first
Science: Safety studies show a high margin of safety at standard use levels (87–671 in adults), with minimal skin penetration due to the ingredient's volatility. However, recent dermatological reports flag pentylene glycol as an emerging contact allergen in some individuals, warranting attention for those with sensitive skin.
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Chlorphenesin is a synthetic preservative used in skincare products to prevent bacterial and fungal growth, extending shelf life. It's a broad-spectrum antimicrobial agent that helps keep products safe from contamination during storage and use.
Benefits
- Prevents microbial contamination in skincare formulations
- Extends product shelf life
- Allows formulas to remain stable without refrigeration
Potential concerns
- May cause irritation to sensitive eyes and eye area when present in eye products
- Degrades under UV exposure, potentially creating more harmful breakdown products
- Limited long-term safety data in peer-reviewed literature
Science: Research shows chlorphenesin can be toxic to eye tissue cells at approved concentrations, particularly affecting meibomian glands. When exposed to sunlight, it breaks down into compounds like 4-chlorophenol that may be more ecotoxic than the original ingredient, though systemic absorption in skincare is typically minimal.
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Squalane is a lightweight, skin-identical oil derived from squalene (a natural component of human sebum). It absorbs easily into the skin to lock in moisture and create a smooth, soft feel without leaving a greasy residue.
Benefits
- Hydrates and moisturizes skin
- Mimics skin's natural oils for better compatibility
- Lightweight emollient that doesn't clog pores
- Antioxidant properties
- Well-tolerated by most skin types
Science: The Cosmetic Ingredient Review Expert Panel confirmed squalane is safe for cosmetic use at typical concentrations (2023). Research demonstrates skin hydrating and emollient activity, and squalane is naturally present in human sebum at ~13%, making it biocompatible with skin.
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Salicylic acid is a beta hydroxy acid (BHA) that works by gently exfoliating the skin's surface and penetrating pores to remove dead skin cells and excess oil. It's commonly used in acne treatments and can help improve skin texture and clarity.
Benefits
- Helps reduce acne breakouts by unclogging pores
- Gently exfoliates to improve skin texture
- May help fade dark spots and improve uneven skin tone when used as part of combination treatments
Potential concerns
- Can cause dryness, irritation, or sensitivity, especially with frequent use or in higher concentrations
- May increase sun sensitivity, so daily sunscreen is recommended
- Not recommended during pregnancy without consulting a healthcare provider
Science: Salicylic acid is recognized as a first-line topical acne treatment and is considered safe for most users. Research also supports its use as an adjuvant therapy for melasma and hyperpigmentation when combined with other treatments. Start with lower concentrations and introduce gradually to minimize irritation.
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Caprylic/capric triglyceride is a lightweight oil derived from coconut or palm oil. In skincare products, it acts as an emollient and helps formulations spread smoothly while creating a protective barrier on the skin's surface to lock in moisture.
Benefits
- Improves skin hydration by reducing water loss from the skin
- Lightweight texture that absorbs quickly without feeling greasy
- Helps stabilize and improve the texture of skincare formulations
Science: Research shows that emulsions containing 15% caprylic/capric triglyceride significantly increase skin hydration and reduce transepidermal water loss (TEWL) through occlusion. The ingredient is also commonly used as a carrier oil in advanced delivery systems for other active ingredients, demonstrating good skin compatibility and efficacy as a cosmetic base.
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