Medik8 Crystal Retinal 6™

Name: Medik8 Crystal Retinal 6™
Brand: Medik8
Price: 55.00 GBP
Availability: InStock
Rating: 4.60 (5 reviews)

£55.00

£183.33100ml

Tax included.

✓ Clinically Proven: 20% Wrinkle Reduction | ✓ 11x Faster Than Retinol

Medik8 Crystal Retinal 6 is the clinically-tested heart of the Crystal Retinal range. Independent trials on this exact 0.06% formula showed a 20% reduction in wrinkles, 20% reduction in hyperpigmentation and 11% increase in firmness—with 100% of participants finding it gentle on skin.

This is the strength where visible transformation accelerates. Retinaldehyde works 11x faster than retinol, and Medik8's patented crystal stability system ensures every drop delivers maximum potency. Fine lines visibly smooth, dark spots fade faster, and skin develops a firmer, more youthful bounce.

If you've completed a tube of Crystal Retinal 3 or you're an experienced retinol user ready to upgrade, CR6 delivers the proven results that made this range the UK's No.1 dermatological face serum.

Visible Results Users Love

Visibly smoother, refined skin texture within 7 days
20% reduction in the appearance of wrinkles (clinical study)
20% reduction in visible hyperpigmentation
11% increase in skin firmness
Brighter, more even-toned complexion in 2-4 weeks
97% felt their skin had a more youthful appearance

Why This Beats Standard Retinol

Retinaldehyde is one conversion step closer to retinoic acid (the active form of vitamin A) than retinol—meaning it works 11x faster without a prescription. But most retinals degrade rapidly once opened, losing potency within weeks. Medik8's patented crystal encapsulation and carrot seed oil complex solve this, delivering stable, effective retinal from the first pump to the last. Add airless packaging that prevents oxidation, and you have the most reliable vitamin A results outside a dermatologist's office.

Best For

Those who've completed at least one tube of Crystal Retinal 3, experienced retinol users ready to upgrade, anyone seeking the clinically-tested strength (studies conducted on CR6).

Size: 30ml

FAQS

Can I start with Crystal Retinal 6? +

Only if you're an experienced retinol user with resilient skin. Otherwise, start with CR1 or CR3 and work up. Skipping strengths often leads to unnecessary irritation.

Why is Crystal Retinal 6 considered the 'clinically proven' strength? +

Independent clinical trials were conducted specifically on the CR6 formula, demonstrating 20% wrinkle reduction, 20% hyperpigmentation reduction and 11% firmness increase over 12 weeks.

Is this the strength most people use long-term? +

Many users find CR6 their 'maintenance' strength—effective enough for visible results, gentle enough for indefinite nightly use. Others continue climbing to CR10 or beyond.

Can I use this with exfoliating acids? +

Use caution. Avoid AHAs/BHAs on the same nights as Crystal Retinal. If using both in your routine, alternate nights or use acids in the morning only.

How does this compare to prescription tretinoin? +

Retinaldehyde delivers results comparable to low-strength prescription retinoids but with significantly less irritation. For stronger prescription-level results, consult a dermatologist.

My skin looks slightly peachy after application—is this normal? +

The natural colour of retinaldehyde can leave a slight tint, especially at CR6 and above. This is normal and fades by morning. Using moisturiser on top helps reduce any visible colour.

Medik8 Crystal Retinal 6™