Medik8 Crystal Retinal 3 - Age-Defying Night Serum - Improves Wrinkles & Skin Firmness- 0.03% Retinal Strength - 11x Faster than Retinol - For New Vitamin A Users - 30ml vs La Roche-Posay Mela B3 Serum, Dark Spot Corrector With Anti-Aging Melasyl + 10% Niacinamide, Discoloration Correcting Serum for Sun Spots, Age Spots & Post-Acne Marks, Long-Lasting Results, 30ML
Side-by-side comparison of scores, ingredients, prices and real customer feedback for Medik8 Crystal Retinal 3 - Age-Defying Night Serum - Improves Wrinkles & Skin Firmness- 0.03% Retinal Strength - 11x Faster than Retinol - For New Vitamin A Users - 30ml and La Roche-Posay Mela B3 Serum, Dark Spot Corrector With Anti-Aging Melasyl + 10% Niacinamide, Discoloration Correcting Serum for Sun Spots, Age Spots & Post-Acne Marks, Long-Lasting Results, 30ML.
Last verified: 07 Apr 2026 · Based on 24 reviews
Medik8 Crystal Retinal 3 - Age-Defying Night Serum - Improves Wrinkles & Skin Firmness- 0.03% Retinal Strength - 11x Faster than Retinol - For New Vitamin A Users - 30ml scores 79.0/100 vs La Roche-Posay Mela B3 Serum, Dark Spot Corrector With Anti-Aging Melasyl + 10% Niacinamide, Discoloration Correcting Serum for Sun Spots, Age Spots & Post-Acne Marks, Long-Lasting Results, 30ML at 75.0/100. Medik8 Crystal Retinal 3 - Age-Defying Night Serum - Improves Wrinkles & Skin Firmness- 0.03% Retinal Strength - 11x Faster than Retinol - For New Vitamin A Users - 30ml wins on effectiveness, ingredient quality, skin compatibility. La Roche-Posay Mela B3 Serum, Dark Spot Corrector With Anti-Aging Melasyl + 10% Niacinamide, Discoloration Correcting Serum for Sun Spots, Age Spots & Post-Acne Marks, Long-Lasting Results, 30ML is stronger on value for money.
How Do the Scores Compare?
Medik8 Crystal Retinal 3 - ...
Medik8
|
La Roche-Posay Mela B3 Seru...
La Roche-Posay
|
|
|---|---|---|
| Overall Score | 79.0 | 75.0 |
| Effectiveness |
81.0/100
Best
|
72.0/100 |
| Ingredient Quality |
86.0/100
Best
|
81.0/100 |
| Skin Compatibility |
83.0/100
Best
|
82.0/100 |
| Texture & UX |
78.0/100
Best
|
76.0/100 |
| Value for Money | 61.0/100 |
64.0/100
Best
|
| Best Price | £49.00 Amazon UK → |
£36.00
Amazon UK →
Cheapest
|
| Form | N/A | N/A |
| Dose | N/A | N/A |
| Third-Party Tested | ✗ No | ✗ No |
| Reviews Analysed | 13 | 11 |
Medik8 Crystal Retinal 3 - Age-D...
Pros
- ✓Retinaldehyde requires fewer conversion steps to retinoic acid than retinol, producing faster and more reliable results at equivalent concentrations
- ✓Excellent tolerability profile — multiple reviewers with sensitive skin report no irritation when phased in gradually as directed
- ✓Supportive co-ingredients (Hyaluronic Acid, Glycerin, Vitamin E) actively mitigate the dryness and barrier disruption typical of retinoids
- ✓Documented antibacterial activity against acne-causing bacteria provides a dual anti-aging and blemish-clarifying benefit
Cons
- ✗Premium price point makes cost-per-use high relative to retinol-based alternatives offering similar entry-level concentrations
- ✗Pump dispenser reported to malfunction near end of tube, requiring users to cut it open to avoid product waste
- ✗Retinaldehyde is unstable and degrades faster than retinol in air and light — airless packaging mitigates this but shelf life post-opening is limited
- ✗Visible results require 3–6 months of consistent use; several reviewers caution against unrealistic short-term expectations
Best For
La Roche-Posay Mela B3 Serum, Da...
Pros
- ✓10% Niacinamide is a high, clinically validated concentration for brightening, pore minimisation, and barrier support
- ✓Melasyl (proprietary LRP molecule) targets melanin transfer — a mechanism distinct from most over-the-counter brighteners, adding genuine differentiation
- ✓Multiple reviewers confirm visible improvement in sun spots and post-acne marks within 4–12 weeks of consistent use
- ✓Lightweight, fast-absorbing texture layers well under moisturiser and SPF without pilling or stickiness
Cons
- ✗Results for true melasma are modest — users with chronic or hormonal melasma report only partial fading and may need prescription actives (tretinoin, tranexamic acid)
- ✗Overapplication causes a yellowish residue on skin — characteristic of high-percentage Niacinamide and can be off-putting
- ✗Distinctive non-cosmetic scent (raw ingredient odour noted) may be unpleasant for fragrance-sensitive users
- ✗Premium price point: some reviewers note comparable results may be achievable with lower-cost Niacinamide serums, reducing perceived value
Best For
What does the data say about Medik8 Crystal Retinal... vs La Roche-Posay Mela B3...?
Medik8 Crystal Retinal 3 delivers 0.03% retinaldehyde, a Vitamin A derivative that sits one metabolic step closer to active retinoic acid than retinol, making it measurably more potent per concentration without the prescription requirements of tretinoin.
What are the key differences?
Frequently Asked Questions
Which is better, Medik8 Crystal Retinal 3 - Age-Defying Night Serum - Improves Wrinkles & Skin Firmness- 0.03% Retinal Strength - 11x Faster than Retinol - For New Vitamin A Users - 30ml or La Roche-Posay Mela B3 Serum, Dark Spot Corrector With Anti-Aging Melasyl + 10% Niacinamide, Discoloration Correcting Serum for Sun Spots, Age Spots & Post-Acne Marks, Long-Lasting Results, 30ML? ▼
Is Medik8 Crystal Retinal 3 - Age-Defying Night Serum - Improves Wrinkles & Skin Firmness- 0.03% Retinal Strength - 11x Faster than Retinol - For New Vitamin A Users - 30ml worth the price compared to La Roche-Posay Mela B3 Serum, Dark Spot Corrector With Anti-Aging Melasyl + 10% Niacinamide, Discoloration Correcting Serum for Sun Spots, Age Spots & Post-Acne Marks, Long-Lasting Results, 30ML? ▼
Related Product Comparisons
Naturium Retinaldehyde Cream Serum 0.05%, Advanced Anti-Ageing & Smoothing Face & Skin Care
vs Medik8 Crystal Retinal 3 - Age-Defying Night Serum - Improves Wrinkles & Skin Firmness- 0.03% Retinal Strength - 11x Faster than Retinol - For New Vitamin A Users - 30ml
Naturium Retinaldehyde Cream Serum 0.05%, Advanced Anti-Ageing & Smoothing Face & Skin Care
vs La Roche-Posay Mela B3 Serum, Dark Spot Corrector With Anti-Aging Melasyl + 10% Niacinamide, Discoloration Correcting Serum for Sun Spots, Age Spots & Post-Acne Marks, Long-Lasting Results, 30ML
Minimalist 10% Niacinamide Face Serum for Acne Marks, Blemishes & Oil Balancing with Zinc
vs Medik8 Crystal Retinal 3 - Age-Defying Night Serum - Improves Wrinkles & Skin Firmness- 0.03% Retinal Strength - 11x Faster than Retinol - For New Vitamin A Users - 30ml
Minimalist 10% Niacinamide Face Serum for Acne Marks, Blemishes & Oil Balancing with Zinc
vs La Roche-Posay Mela B3 Serum, Dark Spot Corrector With Anti-Aging Melasyl + 10% Niacinamide, Discoloration Correcting Serum for Sun Spots, Age Spots & Post-Acne Marks, Long-Lasting Results, 30ML
Medik8 Crystal Retinal 3 - Age-Defying Night Serum - Improves Wrinkles & Skin Firmness- 0.03% Retinal Strength - 11x Faster than Retinol - For New Vitamin A Users - 30ml
vs The Ordinary Granactive Retinoid 2% Emulsion, Advanced Retinoid Alternative for Anti-Aging and Skin Texture Improvement, 30ml
Medik8 Crystal Retinal 3 - Age-Defying Night Serum - Improves Wrinkles & Skin Firmness- 0.03% Retinal Strength - 11x Faster than Retinol - For New Vitamin A Users - 30ml
vs La Roche-Posay Retinol B3 Anti-wrinkles Anti-Ageing Serum With Retinol And Vitamin B3 Suitable For Sensitive Skin 30ml
What the Data Says
Retinol vs retinaldehyde: which actually scores higher?
Retinaldehyde leads by 17.2 points on effectiveness. Across 42 retinol/retinoid products we scored, the 3 retinaldehyde products average 78.3 on effectiveness versus 61.1 for 31 retinol products.
The retinaldehyde products in our database:
- Naturium Retinaldehyde Cream Serum 0.05% — 80 effectiveness, 83 overall
- Paula's Choice CLINICAL Pro Retinaldehyde — 74 effectiveness, 64 overall
- Medik8 Crystal Retinal 3 — 81 effectiveness, 79 overall (uses retinaldehyde despite the name)
All three beat the retinol average on effectiveness. The biological reason: retinaldehyde sits one conversion step closer to retinoic acid, the form your skin actually uses. Retinol requires two conversions; retinaldehyde requires one.
The honest caveat: 3 products is a small sample. The gap is wide enough to take seriously, but we'd want more retinaldehyde products on the market before calling it definitive. For now, the data favours retinaldehyde — but your options are limited.
Why do most retinol products score below average?
31 retinol products average 61.1 on effectiveness. Most land in mediocre territory. The molecule works — but the average product doesn't deliver it well.
The top retinol performers prove it can be done right:
- Paula's Choice CLINICAL 1% Retinol — 82 effectiveness, 76 overall
- Indeed Labs Retinol Reface — 80 effectiveness, 75 overall
- The Ordinary Retinol 0.5% in Squalane — 75 effectiveness, 74 overall
Three factors separate winners from the rest:
- Concentration. Products with clearly stated, meaningful percentages (0.5%–1%) score higher. Many products list retinol without disclosing how much.
- Stability. Retinol degrades with light and air exposure. Good packaging (airless pumps, opaque tubes) and encapsulation technology keep the molecule intact.
- Supporting ingredients. Top scorers pair retinol with stabilisers, squalane, or delivery systems that protect it until it reaches your skin.
The average retinol product fails on one or more of these. A retinol label doesn't guarantee results — the formulation behind it determines whether you're getting active retinol or degraded filler.
Disclaimer: AIScored provides data-driven comparisons based on publicly available reviews. This is not medical advice. Affiliate links may earn us a commission at no extra cost to you.
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