NYX PROFESSIONAL MAKEUP, Line Loud, Waterproof Lip Pencil, Infused with Vitamin E, Vegan Formula - FIERCE FLIRT (Pink) | Jojoba & Vitamin E Oil, Vegan Formula, No Transfer or Smudge, 28 Vibrant Colours, Precise Application

NYX PROFESSIONAL MAKEUP, Line Loud, Waterproof Lip Pencil, Infused with Vitamin E, Vegan Formula - FIERCE FLIRT (Pink) | Jojoba & Vitamin E Oil, Vegan Formula, No Transfer or Smudge, 28 Vibrant Colours, Precise Application

ASIN: B09ZKKW6Q6
Analysis Date: Aug 10, 2026

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Review Analysis Results

B
Authenticity Grade
15.00%
Fake Reviews
4.22
Original Rating
3.90
Adjusted Rating

Analysis Summary

The vast majority of these reviews appear genuine, with clear personal experiences, specific product details, and balanced perspectives. The reviews are from verified purchases, which significantly increases their authenticity. The high ratings are consistent with a quality product that meets user expectations, and the detailed descriptions of performance, texture, and shade accuracy align with real user feedback.

Evidence of authenticity is strong across the board. For instance, one reviewer shares a personal routine of applying the liner only in the morning and not needing reapplication, which is a specific, experience-based claim. Another mentions the product's buttery texture and how it pairs with gloss, using enthusiastic but plausible language. A critical review highlights the shade 'Fierce Flirt' as perfect but complains about sharpening issues, showing a balanced, non-promotional perspective. Another reviewer notes the product's pigmentation and smudge time, which are technical details that suggest hands-on testing.

There are minimal concerns. One review is very short and generic ('Perfect color. Goes on smooth'), which could be a placeholder or a quick positive note, but it lacks the marketing language or repetitive patterns typical of fake reviews. Another review is cut off mid-sentence, but the content provided is specific and genuine-sounding. No reviews show signs of incentivization, repetitive phrasing across multiple reviews, or unnatural enthusiasm without substance.

Overall, the reviews reflect a product that performs well for many users, with a few caveats about sharpening and lasting power for some. The low fake percentage is justified because the reviews are overwhelmingly authentic, with only a couple of brief or incomplete entries that are not necessarily fake but lack depth. The product appears to be a high-quality, pigmented lip liner with good staying power, though some users find it difficult to sharpen and a few note it can look crusty or lack depth for certain preferences.

Key patterns identified in the review analysis include: Specific product details (shade names, texture, lasting power), Personal usage routines and preferences, Balanced feedback with both pros and cons.

Review Statistics

6,579
Total Reviews on Amazon
-0.32
Rating Difference
Editor's Analysis

Line Loud Lip Pencil: Bold, Waterproof Color with a Velvety Finish

When it comes to lip liners, the NYX Line Loud pencil stands out with its waterproof, smudge-proof formula and a vibrant pink shade like Fierce Flirt. This guide will help you understand what makes a lip liner effective, from pigment payoff to wearability, and why the Line Loud's vitamin E and jojoba oil infusion matters for your lips.

Key Considerations Before Buying

  • Waterproof and transfer-resistant claims are crucial for all-day wear, but they can also mean the product is harder to remove. Look for a formula that balances longevity with easy removal, like this one, which is infused with oils to keep it from drying out.
  • The shade 'Fierce Flirt' is a bold pink that may not suit every skin tone. Consider your undertone—cool pinks flatter fair to medium skin, while warmer pinks complement deeper complexions. The 28-color range suggests there's a match for everyone.
  • Precision is key for lip liners, especially for defining the cupid's bow or correcting asymmetry. The pencil tip should be fine enough for detailed work, and the formula should glide on without tugging.

What Our Analysts Recommend

Quality lip liners should have a creamy yet firm texture that allows for smooth application without breaking or crumbling. Check for ingredients like vitamin E and jojoba oil, which indicate added nourishment, and ensure the color payoff is opaque in one swipe. A good liner will also stay put for hours without feathering or bleeding.

Lip Liners Market Context

Market Overview

The lip liner market has evolved from a mere lipstick companion to a standalone statement product, with brands like NYX leading the charge in affordable, high-pigment options. Consumers now expect lip liners to offer both definition and full coverage, often using them as a base for liquid lipsticks or as an all-over color.

Common Issues

Common complaints with lip liners include dryness, patchiness, and a waxy texture that makes blending difficult. Many formulas also fail to live up to their waterproof claims, leading to smudging after eating or drinking. The Line Loud addresses these with its infused oils and smudge-proof technology, but individual results can vary.

Quality Indicators

High-quality lip liners are typically characterized by their ingredient list—look for nourishing oils and vitamins—and their performance in wear tests. User reviews that mention 'no transfer' and 'lasts all day' are positive indicators. Also, a brand's reputation for consistent color payoff across its range is a good sign.

Review Authenticity Insights

Grade B Interpretation

The Grade B rating, with an estimated 15% fake reviews, indicates that while the majority of reviews are genuine, a notable minority may be incentivized or unnatural. This doesn't discredit the product, but it suggests that the 4.22 average rating might be slightly inflated. The adjusted rating of 3.90 is likely closer to the true consumer experience.

Trust Recommendation

Trust the adjusted rating and look for detailed reviews that describe specific experiences, such as how the liner survived a meal or how it felt on the lips. Be wary of overly short or gushing reviews that lack specifics. Since the fake percentage is moderate, you can still rely on the overall consensus but should weigh critical reviews more heavily.

Tips for Reading Reviews

For lip liners, focus on reviews that mention wear time, smudging, and how the product reacts with different lip balms or oils. Photos are invaluable—look for swatches and wear tests. Also, check if the reviewer mentions their skin tone or lip condition, as this helps you gauge how the shade might appear on you.

Expert Perspective

The NYX Line Loud lip pencil in Fierce Flirt appears to be a solid performer, especially given its affordable price point and vegan, vitamin-enriched formula. The high volume of positive reviews, even after adjusting for fakes, suggests it meets or exceeds expectations for most users. The waterproof and smudge-proof claims are backed by many personal anecdotes, making it a reliable choice for long days.

Purchase Considerations

If you're looking for a long-lasting, vibrant lip color that won't dry out your lips, this is a strong candidate. However, consider your comfort with a bold pink and whether you prefer a pencil that requires sharpening (this one does) versus a twist-up. Also, be prepared for a more intense color that may need careful application.

Comparing Alternatives

While the Line Loud is a great option, it's wise to compare it with other NYX liners like the Slim Lip Pencil or with high-end brands like Charlotte Tilbury, which offer similar claims but at a different price point. Your choice should hinge on your budget and specific needs for wear and hydration.

Price Analysis

This NYX lip pencil is a budget-friendly option, typically priced around CAD $12, which is reasonable for the quality. Since the current Amazon price is unknown, aim to pay no more than CAD $12 and wait for a sale if possible. Given its high rating and vegan formula, it's a solid value purchase for everyday use.

MSRP Assessment

Estimated MSRP: CAD $12
Source: Brand typical pricing
Amazon Price: Unable to compare

Market Position

Positioning: Budget
Alternatives Range: CAD $8-$20
Value: Offers drugstore-level affordability with high pigmentation and long-wear claims, comparable to higher-end lip liners at a fraction of the cost.

Buying Tips

Best Time to Buy: Best time to buy is during Amazon Prime Day, Black Friday, or after holiday sales; NYX often discounts 20-30% during these events.
Deal Indicators: A good deal is under CAD $10, or if bundled with other NYX products; watch for coupons on the product page.
Watch For: Be wary of third-party sellers inflating prices above CAD $15; check that the seller is Amazon or NYX official to avoid counterfeit products.
Price analysis generated by AI based on product category and market research. Actual prices may vary. Last analyzed: Aug 10, 2026

Understanding This Analysis

What does Grade B mean?

This product has good review authenticity with minor concerns. While most reviews appear genuine, we detected some patterns that warrant mild caution.

Adjusted Rating Explained

The adjusted rating (3.90 stars) represents what we estimate this product's rating would be if fake reviews were removed. This product's adjusted rating is lower than Amazon's displayed rating (4.22 stars), suggesting positive fake reviews may be inflating the score.

How We Detect Fake Reviews

Our AI analyzes multiple factors: language patterns (generic vs. specific), reviewer behavior (history, timing), temporal anomalies (review clusters), verification status, sentiment authenticity, and statistical outliers. No single factor determines a review is fake - we look at the combination of signals.

Important Limitations

No automated system is perfect. Sophisticated fake reviews can evade detection, and some genuine reviews may be incorrectly flagged. Use this analysis as one data point in your purchasing decision, not the only factor. Reading actual review content yourself is always valuable.

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