★★★★★
I'm 24 now and love it. I use it every evening and it causes no irritation.
Medik8 Crystal Retinal 6
2 in stock (can be backordered)
€79.95
Medik8 Crystal Retinal 6 – For the advanced vitamin A user
Medik8 Crystal Retinal 6 has been developed for those who already have experience with vitamin A in skin care and are ready for the next step.
With a higher concentration retinaldehyde (0.06%) this serum accelerates it restores the skin barrier, refines pores and stimulates collagen production for a firmer, smoother and youthful complexion. The result? A visibly smoother, refined skin texture with maximum anti-aging effect for all skin types
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Clinical results
97%
felt their skin looked more youthful*
20%
less visible wrinkles and lines*
20%
less visible hyperpigmentation*
11%
increase skin firmness*
100%
found Crystal Retinal to be gentle on their skin*
*Proven via an independent clinical study with 1 tube of Crystal Retinal 6. Tested on 33 participants for 12 weeks.
Advantages
Crystal Retinal 6 is the logical next step Crystal Retinal 3
This vitamin A serum has the same soft texture, but more powerful and targeted. Think of it like scaling up your training weight in the gym
Advanced anti-aging boost: refines skin structure and softens fine lines faster than the 3 variant.- Firmness & glow: supports collagen for a fuller, bouncy look with visible overnight radiance.
- Refine pores: skin looks smoother and more even, ideal for irregular texture.
- Pigmentation support: more even skin tone and more clarity.
- Comfortable for the skin: advanced (crystal) stabilization and moisturizing ingredients help limit redness and dryness.
Short: where CR3 is the introduction, delivers CR6 noticeably faster results for those who are already used to vitamin A.
Ingredients
- Retinaldehyde (0.06%) – an advanced vitamin A form that is converted in the skin and known for its fast, visible results compared to classic retinol.
- Hyaluronic acid & glycerin – bind moisture for comfortable hydration and fewer drying lines.
- Vitamin E – antioxidant support; helps protect the formula and skin.
- Squalane – light, skin-identical lipid for a smooth finish without a greasy feeling.
The formula uses a stabilized (crystal) retinal system for controlled release.
Who is this suitable for?
- Experienced vitamin A users who tolerate Retinal 3 without irritation and are ready for the next step.
- Skin with lines, dullness or irregular texture who wants to see results faster.
- Normal to combination skin types. For sensitive skin, first build up tolerance or ask for advice.
Do not use during pregnancy/lactation. Are you new to vitamin A? Start with Crystal Retinal 3 and then switch to 6.
Frequently Asked Questions Crystal Retinal 6
What is the difference between Crystal Retinal 3, 6 and 10?
Crystal Retinal 3 is perfect for those new to vitamin A — mild, safe and ideal for letting the skin get used to it.
Crystal Retinal 6 contains a double concentration of retinaldehyde (0.06%), which provides faster results for skins that are already used to retinoids.
Crystal Retinal 10 is the more powerful formula (0.1%) for the experienced user who wants maximum skin renewal.
Think of it as a skincare step:
→ 3 = starting level
→ 6 = continued / intermediate
→ 10 = expert-level result
How quickly will I see results with Crystal Retinal 6?
Most users notice softer, more even skin within 4 weeks.
After 8 weeks, fine lines are visibly reduced and the skin appears smoother and firmer.
The transition from the 3 variant to the 6 often causes a “boost effect” — as if your skin is activated again to regenerate harder.
Can I use Crystal Retinal 6 every evening?
Not right away. Start with 2–3 evenings a week to allow your skin to adjust.
After 2 to 3 weeks you can increase to every other evening or daily use, depending on skin tolerance.
Always use sun protection of at least SPF 30 during the day.
Can I combine Crystal Retinal 6 with exfoliating acids or peels?
Yes, but not on the same evening.
For example, use an exfoliant on Monday and Wednesday, and your Crystal Retinal 6 on the days in between.
This way you maintain an optimal balance between cell renewal and skin comfort
What if my skin starts to flake or sting slightly?
This is normal when scaling up vitamin A. Temporarily reduce the number of days of use and add a soothing, hydrating serum (such as Medik8 Hydr8 B5). Once your skin has adjusted, you can increase the rhythm again.
Is Crystal Retinal 6 suitable for sensitive skin?
Yes, provided the skin is already used to vitamin A products. With a real one For sensitive skin or rosacea, we first recommend Crystal Retinal 3 or the specially formulated Crystal Retinal Ceramide Eye around the eyes.
Can I use Crystal Retinal 6 during pregnancy?
No, all forms of vitamin A (including retinaldehyde) are not recommended during pregnancy or breastfeeding
What is the texture and scent of Crystal Retinal 6?
The texture is soft, silky and quickly absorbed without a greasy layer.
The subtle scent is fresh and neutral — typical Medik8: clinical but luxurious
Can I switch directly from Crystal Retinal 3 to 10?
Better not. The skin benefits more from a gradual build-up. Use Crystal Retinal 6 at least 1 to 2 bottles before switching to 10. This keeps the skin stable and minimizes the risk of irritation.
What is the best combination for maximum results?
One in the morning vitamin C serum such as Medik8 C-Tetra Advanced + sun protection,
In the evening Crystal Retinal 6 + moisturizing and restorative cream such as the Night restore or Hydr8 B5.
This routine works like one two-step “youth system”: protect during the day, recover at night.
Experiences & reviews
★★★★★
Fewer pores and a more even complexion. I was apprehensive about retinals, but since using them gradually I've been very happy with the results. Initially I started using it twice a week, but my skin can now tolerate it every night. I have seen a dramatic improvement in overall texture and my pores, which were increasingly enlarged, have become significantly smaller.
★★★★★
Medik 8 great
Delicious velvety soft cream.
Which is easy to spread
Which is easy to spread
How do I use this product?
- Step 1🌙 Evening
Clean carefully
Clean skin is the basis of every evening routine. Use one mild but effective cleanser such as Medik8 Surface Radiance Cleanse or the soft Gentle Cleanse.These formulas remove dirt and makeup without drying out the skin, so that the Retinal can be optimally absorbed.
Pat your skin dry with a soft towel.
- Step 2🌙 Evening
Apply the serum
Use one pump or a pea-sized amount and distribute evenly over face and neck.Avoid the skin around the eyes - that's what the Crystal Retinal Ceramide Eye meant.
Gently massage the serum until it is completely absorbed.
- Step 3🌙 Evening
Build up slowly
Start with two to three evenings a week. Once your skin gets used to it, you can use it every other evening or daily.
Do you notice mild dryness or flaking? That is normal when scaling up. Then temporarily use less frequently and add extra hydration hydrating b5 serum
- Step 4🌙 Evening
Hydrate & restore your skin
End your evening routine with a nourishing cream such as Medik8 Advanced Night Restore.
There is one golden rule that you should not skip:
Always use sun protection with at least SPF 30 – preferably SPF 50 – even on cloudy days. UV rays are always there, even when the sun is not visible. When you use vitamin A products, your skin is more sensitive to UV light, which can cause damage more quickly.
My favorite is the Medik8 Advanced Day Ultimate Protect SPF 50 with broad spectrum sun protection, restores the skin barrier and feels wonderfully light and also protects against blue light — ideal after you Medik8 vitamin C product in the morning
Instructions prepared by Beauty Unlimited Amsterdam. Consult product label and SPF advice for safe use.
