ER Firming Serum (Retinol)
Ilso
A firming serum formulated with retinol, niacinamide, and multiple forms of hyaluronic acid to improve skin elasticity and reduce signs of aging. Suitable for those seeking anti-aging benefits with hydration.
Key Ingredients
Humectant that attracts and retains moisture
Solvent and humectant that enhances absorption
Solvent and preservative booster
+ 15 more ingredients
Ingredient Effectiveness Data
Editorial baseline from K-beauty clinical research and community consensus. Real subscriber reports layer on as the community grows.
More Korean Serums
Frequently Asked Questions
What are the key ingredients in ER Firming Serum (Retinol)?
The key active ingredients in ER Firming Serum (Retinol) by Ilso include Glycerin (Humectant that attracts and retains moisture), Betaine (Humectant and skin conditioning agent), Niacinamide (Vitamin B3) (brightening, pore-minimizing, barrier-support), Macadamia Seed Oil (Emollient oil that moisturizes and softens skin), Chitosan (Film-forming agent and antimicrobial preservative booster). Drawing on K-beauty research and community consensus, key ingredients show 84% effectiveness for irritation in sensitive skin types. Seoul Sister tracks ingredient effectiveness across 5,900+ K-beauty products to provide data-backed recommendations.
Is ER Firming Serum (Retinol) good for sensitive skin?
ER Firming Serum (Retinol) is a Korean serum by Ilso. Sensitive skin compatibility depends on individual triggers and allergies. Seoul Sister's AI advisor Yuri analyzes all 20 ingredients against your specific skin type, concerns, and known allergens to provide a personalized compatibility score. Common irritant ingredients like fragrance, alcohol denat, and essential oils are flagged automatically.
Is ER Firming Serum (Retinol) good for oily skin?
For oily skin, the key factors in evaluating ER Firming Serum (Retinol) are comedogenic ingredient ratings, oil content, and finish type. This serum contains 11 active ingredients. Seoul Sister's database cross-references each ingredient's comedogenic rating (0-5 scale) against your skin type to identify potential pore-clogging risks. Subscribe for a personalized oily skin compatibility analysis.
How much does ER Firming Serum (Retinol) cost?
ER Firming Serum (Retinol) by Ilso starts from $22.53 USD for 30ml. Seoul Sister Pro members compare prices across 6+ authorized retailers including Olive Young, Soko Glam, and YesStyle to find the best deal, with automatic price drop alerts.
Where to buy ER Firming Serum (Retinol)?
ER Firming Serum (Retinol) by Ilso is available from authorized K-beauty retailers including Olive Young Global, Soko Glam, YesStyle, and Amazon. Prices start from $22.53 USD. Seoul Sister verifies retailer authenticity and tracks counterfeit indicators to help you buy genuine Korean skincare products.