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Youth Series Tranexamic Acid 2.5%, Niacinamide 4% Brightening Serum
sale price $17.52 - $35.12
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Glycerin is a naturally derived humectant—a ingredient that draws moisture from the air into your skin. It's one of the most widely used and well-studied moisturizing agents in skincare, helping skin feel softer and more hydrated.
Benefits
- Attracts and retains moisture in the skin
- Improves skin hydration and softness
- Helps strengthen skin barrier function
- Suitable for most skin types, including sensitive skin
Science: The Cosmetic Ingredient Review Expert Panel concluded glycerin is safe as used in cosmetics across all concentrations. Research shows glycerin effectively improves skin hydration and is well-tolerated with minimal irritation risk. It is also referenced in clinical guidelines for managing inflammatory skin conditions and maintaining skin integrity.
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Citric acid is a naturally occurring organic acid commonly used in skincare products as an exfoliant and pH balancer. It belongs to a group of ingredients called alpha-hydroxy acids (AHAs) that help remove dead skin cells from the surface.
Benefits
- Gentle exfoliation to improve skin texture and appearance
- Helps reduce the appearance of keratosis and acne
- Balances product pH to maintain skin compatibility
Potential concerns
- Can cause irritation, redness, or sensitivity in some users, especially with prolonged or frequent use
- May increase sun sensitivity — sunscreen use is recommended when using AHA products
- Not suitable for very sensitive or compromised skin without caution
Science: Citric acid is an established AHA used in cosmetics for superficial peeling and skin appearance improvement, though research emphasizes that caution should be exercised due to potential adverse reactions. It is widely produced industrially and well-established in skincare formulations.
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Disodium EDTA is a chelating agent that binds to metals and minerals in skincare formulations, helping to preserve product stability and extend shelf life. It's used in small amounts (typically under 2%) to prevent unwanted chemical reactions that could degrade the formula.
Benefits
- Stabilizes cosmetic formulations by binding trace metals
- Extends product shelf life and maintains efficacy
- Allows other skincare ingredients to work more effectively
Potential concerns
- May increase skin penetration of other ingredients by chelating calcium in the skin barrier—only a concern if combined with potentially harmful substances
- Not absorbed through skin in normal use, but inhalation from sprays was identified as a theoretical concern in safety assessments
Science: The Cosmetic Ingredient Review Expert Panel confirmed safety in 2023 based on standard use concentrations. Clinical studies show no skin absorption; however, it can affect how other chemicals penetrate the skin, so formulators must account for this when combining with other actives.
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Sodium benzoate is a preservative used in skincare products to prevent bacterial and fungal growth, extending shelf life. It's a salt derived from benzoic acid and is one of the most widely used preservatives in cosmetics, skincare, and food products.
Benefits
- Prevents microbial contamination and extends product shelf life
- Generally effective at low concentrations (0.1-0.5%)
- Approved for cosmetic use by major regulatory bodies
Potential concerns
- Can cause allergic contact dermatitis in sensitive individuals; identified as an allergen in medical hand cleansers
- Recent research suggests long-term oral intake may affect bone health and increase osteoporosis risk, though topical skincare exposure is minimal
Science: Sodium benzoate is well-established as a safe preservative in cosmetics at typical use levels. However, emerging research indicates that chronic systemic intake may interfere with bone metabolism through the FGF2/p38/RUNX2 pathway. For topical skincare use, the exposure and absorption are minimal compared to dietary intake, but individuals with known sensitivities should avoid it.
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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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Niacinamide is an active form of vitamin B3 that works within your skin's cells to strengthen the barrier, reduce inflammation, and regulate oil production. It's a water-soluble ingredient that's been shown to have multiple benefits across different skin concerns, from sensitivity to aging.
Benefits
- Reduces redness and calms irritation
- Minimizes pore appearance and controls excess oil
- Supports skin barrier function and hydration
- Brightens skin tone and evens complexion
- Has anti-aging properties and protects against environmental damage
Science: Niacinamide is well-tolerated and safe across diverse skin types with strong clinical evidence supporting its use for acne, dermatitis, and general skin health. Research shows it works by regulating inflammation at the cellular level and protecting skin barrier integrity, with proven efficacy in concentrations commonly found in cosmetic products.
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Xanthan gum is a natural thickener derived from fermented bacteria that helps give skincare products a smooth, gel-like texture. It stabilizes formulas and prevents ingredients from separating, while also helping products spread evenly on skin.
Benefits
- Creates smooth, pleasant texture
- Stabilizes emulsions and prevents separation
- Improves product spreadability and application
Science: Xanthan gum is an FDA-approved, anionic polysaccharide with a long history of safe use across food, pharmaceutical, and cosmetic industries since 1969. Its performance as a thickener and stabilizer is well-established in scientific literature, with no notable skin irritation concerns reported.
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Propylene glycol is a lightweight humectant and solvent commonly used in skincare formulations. It helps draw moisture into the skin and improves the texture and spreadability of products.
Benefits
- Hydrates skin by attracting and retaining moisture
- Enhances product texture and makes formulas easier to apply
- Helps active ingredients penetrate the skin more effectively
- Improves stability and shelf life of formulations
Potential concerns
- May cause contact dermatitis or irritation in sensitive individuals
- Can occasionally trigger allergic reactions in susceptible people
- High concentrations may feel sticky or heavy on some skin types
Science: Research confirms propylene glycol acts as a penetration enhancer in topical formulations, improving skin uptake of active ingredients. The ingredient is widely studied and considered safe at typical cosmetic concentrations, though individual sensitivity varies.
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Analysis not yet available for this ingredient.
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Analysis not yet available for this ingredient.
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PEG-40 Hydrogenated Castor Oil is a synthetic ingredient made by chemically modifying castor oil with polyethylene glycol. It functions as an emulsifier and solubilizer, helping to blend oils and water-based ingredients together and improve the texture and stability of skincare formulations.
Benefits
- Helps create smooth, stable product textures
- Improves ingredient mixing in formulations
- Enhances absorption of other active ingredients
Science: Scientific review data confirm PEG-40 hydrogenated castor oil is safe for cosmetic use at concentrations up to 100%, with no documented toxicity concerns for topical application. The ingredient has a well-established safety profile supported by multiple regulatory and peer-reviewed assessments.
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Tranexamic acid is a synthetic amino acid derivative originally developed to reduce bleeding. In skincare, it works by suppressing melanin production and reducing inflammation, making it particularly useful for treating dark spots, melasma, and post-inflammatory discoloration.
Benefits
- Helps fade melasma and stubborn dark patches
- Reduces post-inflammatory hyperpigmentation (dark marks after acne or injury)
- Anti-inflammatory properties may help with rosacea and sensitive skin
- Works well in combination with other treatments
Potential concerns
- Oral/systemic forms have been associated with side effects; topical use is generally safer
- May take several weeks to show visible results
- Limited long-term safety data for topical use in skincare products
Science: Multiple clinical reviews confirm tranexamic acid's effectiveness in treating melasma and post-inflammatory hyperpigmentation, particularly when combined with other therapies. However, systemic (oral) use carries safety concerns, and most skincare applications remain topical, where safety data is still emerging.
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