# Medik8 CRYSTAL RETINAL 6 for oily acne-prone skin

**Lovi Fit: Average fit for oily acne-prone skin.**
Oily Skin Fit: Average · Effectiveness: Average · Safety: Low Risk.

Page: https://lovi.care/skincare/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin

The Lovi Fit is the same in every country; only the stores and prices differ, and the ones here are for the United States.

Brand: [Medik8](https://lovi.care/skincare/brands/medik8)
Category: [Serums and treatments](https://lovi.care/skincare/best/serums)

This fit is calculated for the concerns frequently associated with oily acne-prone skin: shine, breakouts, blemishes, and enlarged pores. For scores based on a full skin profile (12D face scan, goals, preferences), use the Lovi app.

Works for oily acne-prone skin; other serums fit it better.

## Why this fit

- Offers moderate suitability for your oily skin as retinaldehyde helps regulate desquamation and hyaluronic acid provides humectant action, though it lacks sufficient seboregulating ingredients for optimal results.
- While it provides general skincare benefits like hydration from hyaluronic acid and antioxidant protection from vitamin E, these are not targeted for your acne, blemishes, and breakouts.
- The product is generally safe for your oily skin, with a low risk of irritation from retinaldehyde.

## Fit by skin type

- [Oily skin](https://lovi.care/skincare/p/medik8/crystal-retinal-6/for/oily-skin): Average
- [Dry skin](https://lovi.care/skincare/p/medik8/crystal-retinal-6/for/dry-skin): Average
- [Combination skin](https://lovi.care/skincare/p/medik8/crystal-retinal-6/for/combination-skin): Average
- [Sensitive skin](https://lovi.care/skincare/p/medik8/crystal-retinal-6/for/sensitive-skin): Average
- [Acne-prone skin](https://lovi.care/skincare/p/medik8/crystal-retinal-6/for/acne-prone-skin): Average
- [Skin with dark spots](https://lovi.care/skincare/p/medik8/crystal-retinal-6/for/dark-spots): Average
- [Mature skin](https://lovi.care/skincare/p/medik8/crystal-retinal-6/for/mature-skin): Low
- [Dry sensitive skin](https://lovi.care/skincare/p/medik8/crystal-retinal-6/for/dry-sensitive-skin): Average
- [Oily acne-prone skin](https://lovi.care/skincare/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin): Average (this page)

## Key ingredients

Retinaldehyde Vitamin A, Hyaluronic Acid, Tocopherol Vitamin E, Squalane, Glycerin

## What the research says

- Topical hyaluronic acid filler serum combined with Botulinum toxin type A lengthened the duration of the toxin's effect in reducing wrinkles compared to Botulinum toxin type A alone. ([Dermatologic Therapy, 2022](https://pubmed.ncbi.nlm.nih.gov/36200921/))
- A topical serum containing vitamin C, vitamin E, and raspberry leaf cell culture extract improved skin color, elasticity, radiance, smoothness, scaliness, and wrinkles compared to the untreated contralateral side in fifty female volunteers. ([Journal of Cosmetic Dermatology, 2020](https://pubmed.ncbi.nlm.nih.gov/31975502/))
- Twice daily application of retinaldehyde 0.1% and 0.05% creams for 3 months improved skin texture and hydration and reduced transepidermal water loss in 40 female Korean volunteers, with only the 0.1% cream significantly improving the melanin index. ([Journal of Cosmetic Dermatology, 2018](https://pubmed.ncbi.nlm.nih.gov/29663701/))
- Topical retinaldehyde demonstrated significant antibacterial activity against gram-positive bacteria both in vitro and in vivo, leading to decreased bacterial counts without inducing resistance. ([Dermatology, 2002](https://pubmed.ncbi.nlm.nih.gov/12218231/))
- Topical 0.05% retinaldehyde applied over 1 year significantly increased epidermal thickness of the temple and cutaneous elasticity compared to an emollient control group in 40 aging skin patients. ([Dermatology, 1999](https://pubmed.ncbi.nlm.nih.gov/10473959/))
- Topical application of 0.1% hyaluronic acid formulations of different molecular weights led to significant improvements in skin hydration and elasticity, with low-molecular-weight formulations also significantly reducing wrinkle depth in seventy-six female subjects compared to a vehicle control. ([Journal of Drugs in Dermatology, 2011](https://pubmed.ncbi.nlm.nih.gov/22052267/))
- Topical application of hyaluronic acid in conjunction with free gingival graft significantly reduced donor site postoperative pain until day 7 compared to normal saline, with no significant differences in graft dimensions or patient satisfaction. ([Clinical Oral Investigations, 2022](https://pubmed.ncbi.nlm.nih.gov/34623507/))
- Treatment with a hyaluronic acid-containing mouth rinse or topical gel led to significant lesion reduction, pain relief, and normalization of lesion color in adult patients with minor recurrent aphthous stomatitis, with the gel formulation showing an earlier healing onset at 3 days. ([BMC Oral Health, 2019](https://pubmed.ncbi.nlm.nih.gov/31311529/))
- Topical application of an antioxidant serum containing 15% ascorbic acid, 0.5% ferulic acid, and 1% tocopherol prevented particulate matter-induced degradation of extracellular matrix components, inflammation, and oxidative stress in the skin of 15 female volunteers compared to untreated controls. ([Journal of Cosmetic Dermatology, 2025](https://pubmed.ncbi.nlm.nih.gov/40642809/))
- Dermatological products containing d-alpha tocopheryl acetate showed non-comedogenic potential with less than a 50% increase in microcomedones in 12 healthy male subjects compared to octyl palmitate. ([Contemporary Clinical Trials Communications, 2021](https://pubmed.ncbi.nlm.nih.gov/34471722/))
- Topical application of an antioxidant mix containing 15% ascorbic acid, 0.5% ferulic acid, and 1% tocopherol prevented PM and UV-induced skin barrier perturbation, lipid peroxidation, inflammatory markers, MMP9 activation, and Type I collagen loss in 15 healthy females compared to untreated exposed skin. ([Journal of Cosmetic Dermatology, 2024](https://pubmed.ncbi.nlm.nih.gov/38590207/))
- Squalane at 0.005-0.015% counteracts UVA-induced oxidative stress, inflammation, and collagen metabolism inhibition while stimulating fibroblast migration in human dermal fibroblasts. ([Molecules, 2025](https://pubmed.ncbi.nlm.nih.gov/40363772/))
- Plant-derived squalane protected human dermal fibroblasts against UVA-induced damage by counteracting ROS formation, suppressing apoptosis-related proteins p53, caspase-3, caspase-9, and PARP, and restoring the pro-survival p-Akt/mTOR pathway. ([Antioxidants, 2025](https://pubmed.ncbi.nlm.nih.gov/40722956/))
- A single application of a moisturizing fluid containing hyaluronic acid 1%, glycerin 5%, and Centella asiatica stem cells extract significantly increased skin hydration by 29% and reduced transepidermal water loss at 24 hours compared to baseline and an untreated control site in twenty healthy women. ([Clinical, Cosmetic and Investigational Dermatology, 2017](https://pubmed.ncbi.nlm.nih.gov/28860834/))
- The emollient V0034CR significantly reduced TEWL compared to vehicle and vehicle plus glycerol, and significantly increased corneometry scores compared to vehicle and vehicle plus petrolatum in healthy volunteers with dry skin, demonstrating combined barrier function improvement from petrolatum and hydration improvement from glycerol. ([Journal of Cosmetic Dermatology, 2020](https://pubmed.ncbi.nlm.nih.gov/31532576/))
- Ten days of treatment with a cream containing 20% glycerin significantly increased skin hydration measured by corneometer values in 17 healthy volunteers compared to a placebo cream, but showed no influence on transepidermal water loss or skin sensitivity to an irritating surfactant. ([International Journal of Cosmetic Science, 2001](https://pubmed.ncbi.nlm.nih.gov/18498456/))

## Why other serums fit oily acne-prone skin better

- A cream combining propolis, tea tree oil, and Aloe vera reduced erythema scars, acne severity index, and total lesion count better than erythromycin cream in sixty patients with mild to moderate acne vulgaris compared to placebo. ([Clinical Pharmacology, 2018](https://pubmed.ncbi.nlm.nih.gov/30588129/))
- Niacinamide and ferulic acid incorporated in a stable multiple emulsion successfully reduced melanin, sebum, and skin erythema while improving skin elasticity and hydration in human skin compared to a placebo. ([BioMed Research International, 2022](https://pubmed.ncbi.nlm.nih.gov/35342760/))

## What reviewers say

Based on a very large amount of data, users consistently praise this serum as a "game-changer" for smoothing texture and brightening dull complexions without the harsh irritation often associated with retinoids. It is frequently recommended for those with acne-prone or sensitive skin who want to target fine lines and congestion, with many reporting "glass skin" results and visibly clearer pores within weeks.

- Liked: Gentle yet effective (mostly mentioned)
- Liked: Improves skin texture (mostly mentioned)
- Liked: Clears acne & congestion (often mentioned)
- Disliked: High price point (often mentioned)
- Liked: Brightening & firming (sometimes noted)
- Liked: Pleasant user experience (sometimes noted)
- Disliked: Packaging issues (sometimes noted)
- Disliked: Yellow staining (sometimes noted)
- Disliked: Mild dryness/purging (rarely noted)
- Disliked: Scent preference (rarely noted)

## How to apply

- Could be used as part of your PM routine. Start 3 times a week and build up to daily use if your skin tolerates it well.
- Apply your serum after cleansing and toning, but before putting on your moisturizer.
- Gently press 2 to 3 drops of the serum into your skin and let it absorb for a minute.
- Apply the serum on clean, dry skin to help manage your blemishes safely.
- Do a patch test before your first use and avoid the delicate eye area.
- Video: https://storage.pora.ai/c879dda8655a61c19d3d8c9ebad6b06d.mp4

## Questions and answers

### How well does Medik8 Crystal Retinal 6 work for oily acne-prone skin?

Medik8 Crystal Retinal 6 works moderately well for oily acne-prone skin, as it helps regulate skin shedding and provides hydration with a low risk of irritation, though it lacks enough oil-controlling ingredients for your breakouts. A treatment of this type needs effective ingredients like niacinamide, propolis, or vitamin C that control oil and target acne while keeping skin comfortable and balanced.
Sources: [Dermatologic Therapy, 2022](https://pubmed.ncbi.nlm.nih.gov/36200921/), [Journal of Cosmetic Dermatology, 2020](https://pubmed.ncbi.nlm.nih.gov/31975502/)

### Which ingredients make this serum a good fit for oily acne-prone skin?

This serum offers moderate suitability for your oily skin because retinaldehyde helps smooth skin shedding and hyaluronic acid provides moisture. While it is generally safe with a low risk of irritation, it lacks sufficient oil-controlling ingredients for optimal results on acne. Treatments that fit this skin better need effective ingredients like niacinamide, propolis, or vitamin C to control excess oil and target blemishes without heavy or pore-clogging components.
Sources: [Dermatologic Therapy, 2022](https://pubmed.ncbi.nlm.nih.gov/36200921/)

### What does Retinaldehyde do for oily acne-prone skin?

Retinaldehyde helps clear blemishes and keeps pores from clogging in oily, acne-prone skin. It significantly reduces bumps and blackheads while keeping side effects very uncommon.
Sources: [Clinical and Experimental Dermatology, 1999](https://pubmed.ncbi.nlm.nih.gov/10564319/), [European Review for Medical and Pharmacological Sciences, 2014](https://pubmed.ncbi.nlm.nih.gov/25219827/)

### What does Hyaluronic Acid do for oily acne-prone skin?

Hyaluronic acid helps calm oily acne-prone skin by reducing sebum production and lipid synthesis in sebaceous glands. It also supports skin barrier function and improves hydration while helping deliver treatments without causing irritation.
Sources: [The Journal of Investigative Dermatology, 2017](https://pubmed.ncbi.nlm.nih.gov/28163068/), [Journal of Cosmetic Dermatology, 2022](https://pubmed.ncbi.nlm.nih.gov/35796638/)

### Where does this serum go in a skincare routine for oily acne-prone skin?

This treatment goes in the evening routine, after cleansing and before moisturizing, for simplicity and extra safety around sun exposure. A product of this type needs additional oil-controlling and blemish-targeting ingredients to give your oily acne-prone skin the best possible fit.

### Can I use this serum with niacinamide, and in what order?

Yes, you can use this treatment with niacinamide, applying the niacinamide first and letting it absorb before putting on this treatment. Using them together is unlikely to irritate your oily skin, though this product needs more oil-clearing ingredients and targeted blemish fighters to truly fit this skin type.

### How often should I use this serum?

Use this treatment in the evening as part of your nighttime routine. It is generally safe for your skin with a low risk of irritation, and an oily acne-prone skin needs ingredients that help balance oil.

### Can this serum clog pores, cause breakouts or purging for oily acne-prone skin?

This treatment may cause mild dryness or purging for oily acne-prone skin, though it is generally safe with a low risk of irritation. A product of this type needs stronger oil-controlling and targeted blemish-fighting ingredients to give your skin the best possible fit.

### Is this serum fragrance-free and alcohol-free?

Yes, it has no fragrance and no drying alcohol. Cetearyl alcohol is a fatty alcohol, which soften the skin.

## Alternatives for oily acne-prone skin

- [Beauty of Joseon Propolis + Niacinamide Glow Serum](https://lovi.care/skincare/p/beauty-of-joseon/propolis-niacinamide-glow-serum/for/oily-acne-prone-skin) — Superior fit — $16.75 at Amazon
- [Neogen Dermalogy Real Vitamin C Serum](https://lovi.care/skincare/p/neogen-dermalogy/real-vitamin-c-serum/for/oily-acne-prone-skin) — Superior fit — $25.08 at Amazon
- [NEOGEN DERMALOGY REAL VITA C SERUM](https://lovi.care/skincare/p/neogen-dermalogy/real-vita-c-serum/for/oily-acne-prone-skin) — High fit — $25.08 at Amazon

## Pairs well with

- Cleanser: [CeraVe Foaming Facial Cleanser](https://lovi.care/skincare/p/cerave/foaming-facial-cleanser/for/oily-acne-prone-skin) — Superior fit — $15.97 at Amazon
- Hydrating Toner: [Paula's Choice Pore-Reducing Toner](https://lovi.care/skincare/p/paula-s-choice/skin-balancing-pore-reducing-toner/for/oily-acne-prone-skin) — Superior fit — $25.60 at Amazon
- Moisturizer: [COSRX Oil-Free Ultra-Moisturizing Lotion with Birch Sap](https://lovi.care/skincare/p/cosrx/oil-free-ultra-moisturizing-lotion-with-birch-sap/for/oily-acne-prone-skin) — Superior fit — $18.99 at Amazon

## Where to buy

No store in United States has a checked price for this product, so the page shows none.

## Ingredients

Water, Glycerin, Caprylic Capric Triglyceride, Cetearyl Alcohol, Dimethicone, Hydrogenated Polydecene, Cetearyl Olivate, Sorbitan Olivate, Retinaldehyde, Hyaluronic Acid, Tocopherol Vitamin E, Phenoxyethanol, Ethylhexylglycerin, Carbomer, Sodium Hydroxide, Disodium Edta, Lecithin, Squalane, Glyceryl Stearate, Peg-100 Stearate
## About the Lovi Fit

Lovi: Unbiased, science-based skincare AI trained on real user outcomes.

Lovi calculates every fit score from the full ingredient list with brand-independent rules its dermatologists and cosmetic chemists build and review, and personalizes every pick with AI trained on the real results of millions of users. Lovi trains its fit score models on a proprietary dataset built from more than 10,000 expert-labeled products and more than 100,000 simulated examples, following an internally consistent methodology presented at Cosmoprof, AMWC, and Skin of Color Update. Levels from best to worst: Superior, High, Average, Low, Caution, Warning.

Behind this fit score: Nadia Kapleva, MS (Co-founder, Medical Director); Alexey Shagraev, PhD (Co-founder, CEO and CTO); Dr. Sofía Perea Pérez, MD, MSc (Medical Board); Aishani Shah, MD (Medical Board); Asya Zubkova, MS (Medical Board); Hanna Kurets, MD (Medical Board, Medical Advisor); Elina Nazarenko, MD (Medical Board); Victoria Derkova, MS (Medical Board).

Page built Nov 8, 2026.

More from Lovi: https://lovi.care/skincare/llms.txt

## This page in other countries

- United States: https://lovi.care/skincare/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin (this page)
- United Kingdom: https://lovi.care/skincare/uk/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin
- Ireland: https://lovi.care/skincare/ie/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin
- Germany: https://lovi.care/skincare/de/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin
- France: https://lovi.care/skincare/fr/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin
- Italy: https://lovi.care/skincare/it/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin
- Netherlands: https://lovi.care/skincare/nl/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin
- Spain: https://lovi.care/skincare/es/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin
- Canada: https://lovi.care/skincare/ca/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin
- Australia: https://lovi.care/skincare/au/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin
- Singapore: https://lovi.care/skincare/sg/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin
- Saudi Arabia: https://lovi.care/skincare/sa/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin
- United Arab Emirates: https://lovi.care/skincare/ae/p/medik8/crystal-retinal-6/for/oily-acne-prone-skin