Benefits
Increases the appearance of eyelash length
Improves the look of longer, fuller eyelashes
Helps lashes look shinier and better conditioned
Supports lash flexibility and strength
Can help reduce the look of lash breakage with consistent use
All data for this product review has been collected from independent tests of Lash Relongé. Individual results may vary and specific results are not guaranteed. All information herein is, to the best of our knowledge, accurate at the time of publication.
Featured Ingredients
Hyaluronic Acid is one of nature’s strongest moisturizers. In lash products, it helps support hydration and a smoother lash feel. Well-hydrated lashes can look healthier, shinier, and less brittle.
Vitamin B5, also known as panthenol, supports lash flexibility and softness. It is a common conditioning ingredient in lash, brow, hair, and skin products.
Biotin is a B vitamin often used in hair and lash formulas. It helps support the appearance of stronger lashes, but it should not be treated as a guaranteed growth ingredient on its own.
Pumpkin seed helps nourish lashes and support a fuller-looking appearance. In a topical serum, it works best as part of the full conditioning formula.
Allantoin soothes, calms, and protects the lash line. This matters because lash serums are applied close to delicate skin.
Lash Relongé also lists ingredients such as Punica Granatum, Cucurbita Pepo, Retinyl Palmitate Vitamin A, cucumber, green tea, hesperidin, deionized water, and xanthan gum. These support the product’s conditioning and skin-comfort profile.
People comparing eyelash growth options should note the difference between cosmetic lash conditioning and prescription lash growth. Lash Relongé appears to sit in the cosmetic serum category.
For a full list of ingredients click here.
Only a partial list of ingredients is provided by the manufacturer website. It includes: Hyaluronic Acid, Vitamin B5, Allantoin, Pumpkin Seed, Biotin, Punica Granatum, Cucurbita Pepo, Retinyl Palmitate Vitamin A, Cucumis Sativus, Camellia Sinesis, Allantoin, Hesperidin, Deionized Water, Xanthan Gum.
Formula note: The available ingredient list is incomplete. Check the product packaging before use, especially if you avoid vitamin A derivatives, botanical extracts, or specific preservatives.
Side Effects and Directions
Test the product on a small patch of skin before use. This reduces the risk of an adverse reaction.
Apply Lash Relongé nightly before bed. Apply a thin line of eyelash enhancer serum to the upper lid along the lash line.
Do not apply the serum inside the eye. Do not apply it to the waterline. Using this serum on the lower lashes can cause irritation because the product may migrate into the eye.
Stop use if you notice redness, swelling, burning, itching, or ongoing watering. The eye area is sensitive, and even cosmetic lash serums can irritate some users.
If you wear contact lenses, remove them before applying the product. Let the serum dry before applying other eye-area products.
Pregnant or nursing users should ask a doctor before use because the partial ingredient list includes retinyl palmitate, a vitamin A derivative.
In-Depth Review
Beauté de Paris is an American company that produces a line of French-inspired beauty products. Lash Relongé is one of the company’s eyelash enhancement products.
The product is positioned as a lash serum for improving the appearance of lash length and fullness. Its ingredient profile focuses on hydration, conditioning, strengthening, and lash-line comfort rather than prescription-style lash growth.
The main ingredients make sense for a cosmetic lash serum. Hyaluronic acid supports hydration. Vitamin B5 helps condition. Biotin supports stronger-looking lashes. Pumpkin seed and botanical extracts add a nourishing angle. Allantoin helps calm the lash line.
The company states that the product has been tested for safety and effectiveness. The original review notes that the company website includes before-and-after photos and reports from clinical testers. It also says testers reported a 55% average increase in the appearance of lash length, with some reporting up to 85%.
Those claims should be read carefully. I could not verify the exact study details through an independent clinical publication. The safest wording is that these are company-reported or tester-reported results, not independently confirmed guarantees.
Many consumers reported good results with proper use. Some also reported no visible improvement. This is common with cosmetic lash serums because lash results depend on the user’s natural lash cycle, application consistency, sensitivity, and baseline lash condition.
Lash Relongé is best viewed as a conditioning lash serum. It can help lashes look fuller and healthier. It should not be described as a medical treatment for lash loss.
People focused on how to grow longer eyelashes should also look at habits that reduce breakage. Gentle cleansing, careful mascara removal, and less tugging at the lash line can make a real difference in lash appearance.
Who Lash Relongé Is Best For
Lash Relongé is best for people who want fuller-looking lashes through a cosmetic serum. It is a good fit for users who want hydration, conditioning, and lash-strength support.
It may work well for lashes that look dry, brittle, sparse, or weak from mascara use, makeup removal, lash extensions, or daily rubbing. Conditioning ingredients can help lashes look healthier over time.
It is also a good option for people who want a serum applied only at night. A once-daily routine is easier to follow than products that require several steps.
Lash Relongé is less ideal for people who want instant results. Mascara, lash lifts, and extensions create faster visible changes. A serum needs time and daily use.
It may also be less ideal for people with highly sensitive eyes. The partial ingredient list includes botanical extracts and retinyl palmitate, and the full preservative system is not visible. Sensitive users should patch test first.
People trying to build thicker eyelashes naturally may use a serum as one support step, but the rest of the routine still matters. Over-rubbing, harsh curlers, and sleeping in mascara can make lashes look thinner.
How to Use Lash Relongé for Best Results
Use Lash Relongé once daily at night. Start with clean, dry skin and remove all eye makeup first.
Apply a thin line to the upper lash line only. Use the applicator the same way you would apply liquid eyeliner.
Do not coat the full lash length. Lash serums are usually designed for the skin at the root area, not for painting the lashes from root to tip.
Let the serum dry before going to bed. This helps reduce smearing and lowers the chance of the product getting into the eye.
Use it consistently for at least six to eight weeks before judging results. Lashes grow in cycles, so visible changes take time.
Avoid harsh lash habits while using it. Poor eyelash curling can weaken lashes and cause breakage, which works against the serum’s conditioning benefits.
Do not use several lash serums at the same time. Combining formulas can raise the risk of irritation without improving results.
How Lash Relongé Compares to Other Lash Serums
Lash Relongé fits into the cosmetic eyelash serum category. It focuses on ingredients that hydrate, condition, and support healthier-looking lashes.
Compared with prescription lash products, it is less aggressive. Compared with basic conditioning oils, it has a broader serum-style ingredient list.
The broader best eyelash growth products category includes formulas with peptides, vitamins, botanical extracts, prostaglandin-style ingredients, and simple conditioning agents. Lash Relongé is best compared with other cosmetic serums rather than medical lash-growth treatments.
A Marini Lash serum uses a peptide-focused approach and is positioned as prostaglandin-free. A MarveLash serum is another lash enhancement product often compared in the same category.
People comparing popular alternatives may also look at NeuLash serum or RapidLash renewal before choosing. The best option depends on ingredient comfort, sensitivity, price, and desired result.
Is Lash Relongé Worth It?
Lash Relongé is worth considering if you want a cosmetic lash serum that focuses on hydration, conditioning, and fuller-looking lashes. Its ingredient list includes several ingredients commonly used in lash care, including hyaluronic acid, Vitamin B5, biotin, pumpkin seed, and allantoin.
Its strongest point is the conditioning profile. Dry and brittle lashes can look thinner, and a serum that supports moisture and flexibility can help the lashes look healthier.
The biggest weakness is transparency. Only a partial ingredient list is provided. That makes it harder for sensitive users to assess the formula fully.
The reported 55% and 85% improvement claims are also difficult to verify independently. They can be mentioned as reported results, but they should not be written as guaranteed outcomes.
Lash Relongé is a solid option for people who want a nightly lash serum and understand that results take time. It is less convincing for users who need a fully disclosed formula, prescription-level lash growth, or instant dramatic change.
To see how Lash Relongé compares to other similar products, take a look at our compare similar eyelash growth products chart.
All data for this product review has been collected from independent tests of Lash Relongé. Individual results may vary and specific results are not guaranteed. All information herein is, to the best of our knowledge, accurate at the time of publication.
