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Lancôme Cils Booster XL Enhancing Lash & Mascara Primer - Infused with Micro-fibers, Vitamin B5 and Vitamin E - Boosts Mascara Volume, Length & Curl

TLDR Review: Lancôme Cils Booster XL

By ShopSavvy Team

Published: July 5th, 2026

Pros

•Effectively enhances the appearance of natural lashes, making them look long, thick, and curled
•Provides a noticeable boost even without mascara, creating a polished look
•Improves mascara application by reducing clumping and adding volume and definition
•Keeps lashes feeling dry, itcree, and comfortable after application
•Washes off easily, eliminating the need for false lash or glue removal
•Nourishes lashes with micribers, Vitamin B5, and Vitamin E, promoting lash health over time
•Safe for sensitive eyes and unlikely to cause irritation
•Typically shows visible results after about three months of consistent use
•Enhances the effectiveness of any mascara when used immediately after application
•Is generally considered a reliable, higerformance primer that many users view as a must-have

Cons

•Some users report that the primer weighs down lashes, causing them to lose their curl—especially for long, straight lashes
•A few reviews mention that coverage has declined in recent purchases, making mascara application more difficult
•Packaging is considered basic and feels cheap compared to the luxury brand's usual expectations
•The product can be pricey, and some recommend waiting for sales to get better value
•Not ideal for those seeking a curetentive primer, as it may cause lashes to droop or lose their curl
•Some users with very straight lashes found the primer ineffective at holding curl or enhancing lift

Bottom Line

While Lancôme's Cils Booster XL offers impressive lash enhancement, boosting volume, length, and overall lash appearance, it may not be suitable for everyone—particularly those with long, straight lashes who want a curl-retentive primer. Its nourishing formula and quick results make it a popular choice, but the packaging and price point might be downsides. If curl retention is key for you, consider exploring other primers or lash treatments.

How we researched this

About this review: We pulled together findings from professional reviews and hundreds of user reviews, and cross-referenced them with ShopSavvy's pricing data from 111 retailers to give you the short version.