Hyaluron Filler Hydrating Booster
Hyaluron Filler Hydrating Booster
Product Description
Product overview
An ultra-light, minimalist hydrating booster gel with only 11 ingredients. Combines two types of concentrated Hyaluronic Acid and Glycerin to deliver an instant moisture surge that plumps fine lines and keeps skin hydrated for up to 24 hours. Clinically proven: 100% of test subjects felt immediately moisturized.
Dual Hyaluronic Acid System
Medium-chain HA hydrates the skin surface while short-chain HA penetrates deeper into the epidermis to plump wrinkles from within.
Texture & feel
SENSORYDual Hyaluronic Acid System
Medium-chain HA hydrates the skin surface while short-chain HA penetrates deeper into the epidermis to plump wrinkles from within.
Minimalist 11-Ingredient Formula
Stripped-back formula reduces the risk of irritation and sensitization, making it ideal for reactive and sensitive skin types.
Vitamin C Derivative (SAP)
Sodium Ascorbyl Phosphate is a stable form of Vitamin C that provides antioxidant protection and brightens the complexion over time.
Clinically Proven 3x Effect
Fills fine lines, hydrates for up to 24 hours, and refreshes tired-looking skin. 100% of study participants confirmed an immediate moisture boost.
Safety & compatibility
SAFEFree from retinoids, salicylic acid, hydroquinone, and chemical sunscreen filters. All ingredients are considered safe for use during pregnancy and breastfeeding.
Contains PEG-40 Hydrogenated Castor Oil, a polyethylene glycol ester that may feed the Malassezia yeast responsible for fungal acne. Avoid if prone to pityrosporum folliculitis.
Oil-free, silicone-free formula with low comedogenic ingredients. Unlikely to clog pores for most skin types.
Alcohol Denat. is listed as the second ingredient. It helps with absorption and creates a lightweight feel, but may be drying or irritating for very dry or compromised skin barriers.
Although the scent is light, parfum can be a potential allergen for sensitive individuals. Patch testing is recommended for highly reactive skin.
This gentle hydrating booster pairs well with retinol, AHA, BHA, and Vitamin C. An excellent hydration layer to buffer potential irritation from actives.
Ingredient breakdown
INGREDIENTSSodium Hyaluronate (Hyaluronic Acid) ~1.9–2.9%Proven
The hero ingredient. Two molecular weights of hyaluronic acid work in tandem: medium-chain HA binds water on the skin surface for immediate plumping, while short-chain HA penetrates deeper into the epidermis where fine lines and wrinkles originate.
- Function: Humectant — binds up to 1,000x its own weight in water
- Evidence: Extensively studied; topical HA improves skin hydration, elasticity, and reduces wrinkle depth (Journal of Clinical and Aesthetic Dermatology)
- Multi-weight advantage: Low molecular weight HA penetrates further; high molecular weight HA forms a moisture-retaining film on the surface
Glycerin ~2.7–4.0%Proven
One of the most effective and well-researched humectants in skincare. Glycerin draws moisture from the environment and deeper skin layers into the stratum corneum, keeping the skin barrier hydrated and resilient.
- Function: Humectant, skin-identical ingredient, barrier support
- Evidence: A 2016 study found glycerin to be more effective as a humectant than both AHAs and hyaluronic acid alone
- Safety: Comedogenic rating 0, irritancy rating 0 — one of the safest skincare ingredients available
Sodium Ascorbyl Phosphate (Vitamin C) Low %Promising
A stable, water-soluble derivative of Vitamin C. Provides antioxidant protection against free radical damage and has brightening properties. More gentle and stable than pure L-ascorbic acid, though less potent.
- Function: Antioxidant, brightening, anti-acne potential
- Evidence: Studies show in vitro and in vivo efficacy in preventing and treating acne vulgaris; stimulates collagen synthesis in dermal fibroblasts
- Note: Concentration here is supportive rather than therapeutic — positioned as an added bonus, not the star active
Butylene Glycol Mid %Helper
A lightweight solvent and penetration enhancer that helps other ingredients absorb into skin more effectively. Also has mild humectant properties and creates the elegant, non-sticky texture this serum is known for.
- Function: Solvent, penetration enhancer, humectant
- Safety: Generally well-tolerated; CIR assessed as safe at current concentrations
Alcohol Denat. High %Functional
Listed second in the formula, alcohol denat. serves as a solvent and helps the gel absorb quickly, creating the ultra-light, non-greasy finish. It also has antimicrobial properties that aid preservation.
- Function: Solvent, quick-drying agent, penetration enhancer, antimicrobial
- Trade-off: Enables the weightless texture but can be drying for very dry or barrier-damaged skin
11 ingredients
Aqua, Alcohol Denat., Butylene Glycol, Glycerin, Sodium Hyaluronate, PEG-40 Hydrogenated Castor Oil, Caprylyl Glycol, Sodium Ascorbyl Phosphate, Citric Acid, Pentaerythrityl Tetra-di-t-butyl Hydroxyhydrocinnamate, Parfum
Where it fits in your routine
ROUTINEApply as the very first skincare step after cleansing, morning and evening. Layer your regular serums and moisturizer on top. Pairs especially well with Eucerin Hyaluron-Filler day and night creams.
How to use
HOW TO USECleanse Your Skin
Wash your face with a gentle cleanser and pat dry. The booster works best on clean, slightly damp skin to help lock in extra moisture.
Apply 3–4 Drops
Dispense a small amount onto your fingertips. A little goes a long way with this concentrated gel formula.
Massage Gently
Spread evenly across your face, neck, and décolleté using gentle upward motions. Avoid the eye area.
Follow with Moisturizer
Allow 15–30 seconds for absorption, then layer your regular serum, moisturizer, or sunscreen on top to seal in the hydration boost.
Who is it for?
WHOPerfect for you if:
- Your skin feels dehydrated, tight, or dull
- You want to plump fine lines and first wrinkles
- You prefer minimalist formulas with few ingredients
- You need a lightweight hydration layer under makeup
- You use retinol or actives and need extra hydration support
- You want a clinically tested German pharmacy product
Consider alternatives if:
- You have fungal acne (contains PEG-40 Hydrogenated Castor Oil)
- Your skin is extremely dry and needs a rich, occlusive formula
- You are very sensitive to denatured alcohol
- You want a completely fragrance-free product
- You need deep anti-aging actives like retinol or peptides
Skin type compatibility
SKIN TYPESUltra-light, oil-free gel absorbs instantly without adding shine or greasiness. Works beautifully under sunscreen and makeup.
Provides an excellent hydration boost, but dry skin types will still need a heavier moisturizer on top. The alcohol denat. may feel slightly drying for very dry skin.
Ideal match. The lightweight gel hydrates dry areas without overloading the T-zone. Balances well across all face zones.
Dermatologically tested and suitable for sensitive skin per Eucerin. However, contains alcohol denat. and parfum — patch test recommended for very reactive skin.
Oil-free, non-comedogenic formula (1/5). Great for acne-prone skin. However, not safe for fungal acne due to PEG-40 Hydrogenated Castor Oil.
Results timeline
8+ WEEKSInstant Moisture Boost
Skin feels quenched, plumped, and refreshed right after the first application. Fine lines appear visibly softened as the HA draws water into the skin surface.
100% felt immediately moisturized (clinical study)Improved Hydration & Smoother Texture
Consistent use leads to noticeably smoother and more supple skin. The dual HA system progressively improves the skin's moisture reservoir. Fine lines start to look less pronounced.
85% noticed smoother skinVisible Wrinkle Reduction & Radiance
Fine lines and first wrinkles are visibly plumped. Skin looks healthier, more luminous, and more resilient. The Vitamin C derivative contributes to a brighter, more even-toned complexion.
90% reported healthier-looking skinLong-Term Hydration Resilience
Skin's natural hydration capacity is strengthened with continued use. The moisture barrier is more robust, and the complexion maintains a sustained, healthy glow even between applications.
80% would repurchaseRatings by platform
333+ REVIEWSPros & cons
BALANCEDPraised
- Ultra-light gel texture absorbs instantly with no greasy residue
- Only 11 ingredients — one of the most minimalist HA serums available
- Clinically proven: 100% of participants felt immediately moisturized
- Works beautifully as a primer under makeup
- Dual hyaluronic acid system for multi-layer hydration
- Made in Germany by a trusted 100+ year dermocosmetic brand
- Paraben-free and silicone-free
- Excellent for layering with retinol and other actives
Criticized
- Alcohol Denat. as the second ingredient may dry out sensitive or compromised skin barriers
- Contains Parfum — not truly fragrance-free despite being gentle
- Not fungal acne safe (PEG-40 Hydrogenated Castor Oil)
- 30ml is small for the price with twice-daily use
- May feel slightly tacky for a minute before fully absorbing
- Not enough on its own for very dry skin — needs a moisturizer on top
Budget-friendly alternatives (dupes)
DUPES
Similar multi-weight HA approach with added Vitamin B5. No alcohol denat., no fragrance. A fraction of the price but has a thicker, slightly stickier texture and lacks the Vitamin C derivative.
Japanese hydrating lotion with 5 types of hyaluronic acid and urea. Alcohol-free and fragrance-free. Richer, more viscous texture. Fungal acne safe. A cult favorite in the J-beauty space.
French pharmacy competitor with two types of HA plus Vitamin B5 and Madecassoside. No alcohol denat. Richer texture, better for dry skin. More ingredients (less minimalist) but also alcohol-free.
Comparison with competitors
SIDE-BY-SIDE
Storage & shelf life
12 MONTHS12 months after opening
Store in a cool, dry place away from direct sunlight and heat. Keep away from naked flame or direct heat sources (contains alcohol denat.).
Dropper bottle with precise applicator for controlled dispensing
Yes — 30ml is under the 100ml carry-on limit for flights
Frequently asked questions
FAQYes. This product does not contain retinoids, salicylic acid, hydroquinone, or chemical sunscreen filters. All 11 ingredients are considered safe for use during pregnancy and breastfeeding. The Sodium Ascorbyl Phosphate (Vitamin C derivative) and Hyaluronic Acid are both pregnancy-compatible. As always, consult your doctor if you have specific concerns.
No. This product contains PEG-40 Hydrogenated Castor Oil, which is a polyethylene glycol ester flagged as a potential trigger for Malassezia (fungal acne). If you are prone to pityrosporum folliculitis, consider a fungal acne–safe alternative such as the Hada Labo Gokujyun Premium Lotion.
Yes. This is a gentle hydrating booster that pairs well with virtually all actives. In fact, it works exceptionally well as a hydration buffer when used with potentially irritating ingredients like retinol or exfoliating acids. Apply the booster first on clean skin, allow it to absorb, then apply your active treatment. Many users specifically praise this product for making retinol more tolerable.
It is formulated for all skin types, including sensitive skin. It works especially well for oily, combination, and normal skin types due to its ultra-light, non-greasy texture. Dry skin types can also benefit but should follow up with a richer moisturizer. The minimalist formula (11 ingredients) makes it suitable for those who prefer simple routines with fewer potential irritants.
You should feel an immediate moisture boost from the very first application. In clinical studies, 100% of participants confirmed instant hydration. Visible improvements in skin smoothness and fine line reduction are typically noticed within 1–2 weeks of consistent twice-daily use. Optimal results for wrinkle plumping and overall skin radiance are generally seen after 4 weeks of regular use.
Apply as the very first step after cleansing, both morning and evening. It goes on before any other serums, treatments, or moisturizers. Think of it as a hydration primer that prepares your skin to absorb subsequent products more effectively. In the morning: Cleanser → Hydrating Booster → Serum → Moisturizer → Sunscreen. In the evening: Cleanser → Hydrating Booster → Treatment (retinol, etc.) → Night cream.
This product has a comedogenic rating of 1 out of 5, which means it is very unlikely to clog pores. The formula is oil-free, silicone-free, and contains no known highly comedogenic ingredients. It is generally well-suited for acne-prone skin. However, note that it is not fungal acne safe due to the PEG-40 Hydrogenated Castor Oil.
The Period After Opening (PAO) is 12 months. Once opened, use within one year for optimal efficacy. Store in a cool, dry place away from direct sunlight. The 30ml dropper bottle typically lasts around 6–8 weeks with twice-daily use on the face and neck.
Verdict: The Eucerin Hyaluron-Filler Hydrating Booster is an impressive minimalist hydration serum from a trusted German dermocosmetic brand. Its 11-ingredient formula delivers on its promise of instant, lasting moisture with clinically proven results. The dual hyaluronic acid system effectively plumps fine lines, and the ultra-light gel texture makes it a joy to use under makeup or other products. Points are deducted for the alcohol denat. as the second ingredient and the inclusion of parfum, which prevent it from being a universally gentle choice. It's also not fungal acne safe. At around $30 for 30ml, it's mid-range in pricing — not the cheapest HA serum, but the Eucerin quality and clinical backing justify the cost. An excellent choice for those who want effective, no-fuss hydration with pharmaceutical pedigree.
Product Overview
What are Quick Product Notes?
Quick product notes are a great way to check if a product is free from commonly avoided ingredients by skincare enthusiasts. These preferences come about for different reasons depending on the ingredient such as personal experiences, sensitivities, health preferences & etc.
Pro Tip Alert!
Just because a product is not free from a common preference does not mean it's a bad product! You can make a personal decision whether or not you want to use a product that contains these ingredients or not - click the labels of the preference to read more about them.
Quick Product Notes
Paraben-Free
Paraben-Free
Understanding Parabens
Parabens are a large group of preservatives which are used to prevent bacteria growing in cosmetic formulations. There has been some healthy controversy surrounding them due to a few studies finding paraben presence in breast tumours and breast tissue. However, the majority of the scientific community have deemed these findings non-conclusive due to the limitations of these studies. There's still a lot of support for avoiding parabens following the better safe than sorry route. If you do we completely support you! If you are concerned about the health safety of parabens, then feel free to avoid them by looking out for the Paraben-Free icon. If not, don't worry about it - they do have had one of the longest safety records as preservatives!
Which Ingredients are classified as Paraben?
A product will be paraben-free if it does not contain any of the following parabens:
- Sodium Isobutylparaben
- Sodium Ethylparaben
- Sodium Butylparaben
- Propylparaben
- Isopropylparaben
- Isobutylparaben
- Sodium Propylparaben
- Butylparaben
- Ethylparaben
- Sodium Methylparaben
- Methylparaben
Sulfate-Free
Sulfate-Free
Understanding Sulfates
Sulfates are a large group of ingredients which act as cleansing agents in Cosmetics. They help loosen up the dirt and grime from your skin and hair to allow for water to wash it away with ease. However some sulfates are so good at their job, they can wash off your skin’s own natural oils that keep it moisturised and protected which can lead to dryness and irritation. Most people will find no issues with sulfate, however if you find your skin doesn't like sulfates then free feel to avoid them by looking out for the sulfate-free icon on Skincarisma.
Which ingredients are classified as sulfates?
We've taken the Sulfates which are considered more harsh for our Sulfate-Free status. A product will be Sulfate-Free if it does not contain any of the following Sulfates:
- TEA-Dodecylbenzenesulfonate
- Ammonium Laureth Sulfate
- Sodium Lauryl Sulfate
- PEG-15 Cocamine
- Sodium Laureth Sulfate
- Sodium Cocoyl Sarcosinate
- Sodium C14-16 Olefin Sulfonate
- Dioctyl Sodium Sulfosuccinate
- Ammonium Xylenesulfonate
- Ammonium Lauryl Sulfate
- Sodium Xylenesulfonate
- Sodium Myreth Sulfate
- Sodium Lauryl Sulfoacetate
Alcohol-Free
Alcohol-Free
Understanding Simple Alcohols
Alcohol ingredients are widely used in cosmetics and come in different types. For the most part alcohols are not problematic at all. However one type of alcohols, simple alcohols can be quite drying to the skin because it evaporates very quickly. This can cause irritation which can also lead to other skin complications. These alcohols should never be used alone on your skin, but combined with other cosmetic ingredients, they are normally without issue. However, for some people with sensitive and easily irritable skin, avoiding products with these simple alcohols may be beneficial. If you find your skin doesn't like these simple alcohols, then free feel to avoid them by looking out for the Alcohol-Free icon.
Which Ingredients are classified as Alcohol?
A product will be alcohol-free if it does not contain any of the following alcohol ingredients:
- SD Alcohol
- Alcohol Denat
- Isopropyl Alcohol
- Alcohol
Silicone-Free
Silicone-Free
Understanding Silicones
If you've ever used a skincare, makeup or beauty product that's made your skin look and feel smoother tempoarily - it's likely contained Silicone. They are a popular class of ingredients found in cosmetics due to their smooth, soft, easy-to-spread and smooth properties that help creates an artificial layer/barrier on top of skin or hair (commonly found in conditioners).
For the same reasons they are popularly used, they are also commonly avoided. Anecdotally, many individuals have reported that Silicones cause/excerbate breakouts, irritation, cause a feeling of skin being unable to breathe, cause clumping of cosmetic products and find it difficult to wash off. As a result, those who find them problematic are avoiding them and increasingly, cosmetic companies are avoiding them as well.
If you have had bad experiences with Silicones in the past, or suspect they are problematic then look out for the tick on the Silicone-free label.
Disclaimer
The Silicone-free label only includes the most common Silicone ingredients that have indentified been reported by individuals that could potentially cause issues.
These include: Amodimethicone, Behenoxy Dimethicone, Bis-Aminopropyl Dimethicone, Cetearyl Methicone, Cetyl Dimethicone, Cyclomethicone, Cyclopentasiloxane, Dimethicone, Dimethicone Copolyol, Dimethiconol, Methicone, Phenyl Trimethicone, Phenyl Trimethicone, Stearoxy Dimethicone, Stearyl Dimethicone, Trimethylsilylamodimethicone.
Note, that this does not include all ingredients part of the Silicone class of ingredients.
EU Allergen-Free
EU Allergen-Free
Understanding the Identified Contact Allergens
The EU's Scientific Committee on Consumer Safety (SCCS) has identified and established 26 cosmetic ingredients that are likely contact allergens (potential to cause skin allergies) as demonstrated in clinical or epidemiological studies. The EU's SCCS have recommend cosmetic companies to disclose them on the labels if used and in cases where the concentration exceeds 0.001% in leave-on products and 0.01% in rinse-off products, then they must be labelled.
Look out for the tick on the EU-Allergen free label to know your cosmetic is free from any of the 26 identified cosmetic ingredients.
For more information regarding the EU's Scientific Committee on Consumer Safety, please visit their official website.
Disclaimer
The EU Allergen Free label is for the 26 ingredients identified by the EU SCCS and products will be only flagged if a suspected ingredient is on it's ingredient list. It is possible for cosmetics to contain one of the suspect ingredients without it appearing on the ingredient list due to it not reaching the concentration threshold to disclose it and cosmetic manufacturers choice to not disclose it.
Also note, the EU Allergen Free label is not personalized for your own allergies you may have and it does not constitute as medical advice. For your specific case, always consult your medical professiona such as dermatologist, physician, pharmacist, or health care provider - please read our medical disclaimer for more information.
Fungal Acne (Molassezia) Safe
Fungal Acne (Molassezia) Safe
Understanding Fungal Acne (Pityrosporum Folliculitis/Malassezia Folliculitis)
Pityrosporum Folliculitis/Malassezia folliculitis or simply known as Fungal Acne is a persistent acne-like condition that commonly responds poorly to traditional acne-treating methods. Unlike most cases of Acne where bacteria is the culprit, Fungi is the culprit of Fungal Acne (Hence the name!). There are certain classes & groups of ingredients that have been shown to promote and feed the growth of the Fungal Acne, Fungi such as fatty acids, oils, esters, polysorbates and fermented ingredients.
For more information regarding Fungal Acne, please visit Simple Skincare Science (f.c) - #3 of our Recommend Skincare Resources for an amazing comprehensive guide!
Please Read: How to use the Fungal Acne (Malassezia) Label
At SkinCarisma, we've done our best to identify as many ingredients as possible but note the fungal-free label may not be 100% accurate due to the complexconditions and combination of ingredients that malezzeria can thrive on.
Additionally, products that may contain ingredients that have shown to feed Malassezia may not neccessarily exacerbate the condition due to concentration of ingredient used in the product, this information is simply not available on the products.
As a result, please note this is only an experimental label that can be best used to possible identify problematic products you have used in the past. It is in no way a perfect identifier nor a predictor in whether or not it will exacerbate or cause fungal acne. It will continue to be worked on as more information and research comes to light.
If you find any ingredients you believe should be included, please email us at snails@skincarisma.com.
Disclaimer
Due to the lack of substantial research into this area it is very likely there are other ingredients and class/groups of ingredients that could feed Fungal Acne which have not been indentified.
The Fungal-Safe label does not constitute as medical advice. For your specific case, always consult your medical professiona such as dermatologist, physician, pharmacist, or health care provider - please read our medical disclaimer for more information.
What are Notable Effects & Ingredients?
Ever used a product that promised a certain effect but provided no results? It might not have contained any notable ingredients that could have been responsible for that promised effect. It doesn't matter what the marketing or packaging «promises» it can do, if it doesn't contain anything that can help - then the likelihood of it helping is low.
We help you identify key notable ingredients that have been shown to help with effects such as acne-fighting, brightening, UV-protection, wound healing & anti-aging to help you achieve your skincare goals smarter. Please note that different notable ingredients have varying levels of research behind them, some are extremely well proven yet some have mixed research in their efficacy.
Pro Tip Alert!
Just because a product doesn't contain any notable ingredients doesn't mean it's bad. And a product with notable ingredients (or even many) doesn't necessarily guarantee the efficacy of the product performing these effects either. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine this.
Be smart and use this as just a starting point for you to make more informed and smarter choices and compare it with reviews to see if the product is right for you
Notable Effects & Ingredients
Anti-Aging from 2 ingredient(s):
Brightening from 3 ingredient(s):
Promotes Wound Healing from 3 ingredient(s):
What are Ingredients Related to Skin Type?
Why are some products great for some people and horrible for others? Well everyone has different skin types and different reactions to the same ingredients.
We've identified a range of ingredients that are commonly regarded as potentially good or bad for those with Dry, Oily/Acne-Prone or Sensitive skin.
Pro Tip Alert!
A product that contains good or bad ingredients for your skin type doesn't always flat out make the entire product good or bad for your skin. There are other factors such as ingredient quality, concentration and formulation that will ultimately determine your skins reaction.
One of the best ways to use this section is to troubleshoot products you've had bad experiences with in the past. Check if it contains any of the marked ingredients to point out suspect ingredients to avoid in the future!
Ingredients Related to Skin Types
Dry Skin
Oily/Acne-Prone Skin
Sensitive Skin
What is the Ingredient Safety Breakdown?
Ingredient Safety Breakdown refers to the percentage % of ingredients in different risk categories as classified by EWG (Environment Working Group) if they are available. There are almost endless cosmetic ingredients and they are one of the few organisations globally that have assigned ratings to a lot of the more commonly used ingredients which is why we reference them.
Pro Tip Alert!
EWG is seen by many to be more on the alarmist side in their assignment of health ratings resulting in rating ingredients as riskier than they actually are. We recommend using this a reference point rather than a strict guide of ingredient safety and to always do further research if into ingredients that you may find suspect.
Ingredient Safety Breakdown
Product ingredient list
| EWG | CIR | Ingredient Name & Cosmetic Functions | Notes |
|---|---|---|---|
| 1 |
Water
Solvent, Skin Conditioning
|
|
|
| 0 |
Alcohol Denat.
|
|
|
| 1 |
Butylene Glycol
Solvent, Skin Conditioning, Masking, Fragrance, Humectant, Viscosity Controlling, Viscositydecreasing Agent
|
Hydrating
|
|
| 2 |
Glycerin
Solvent, Perfuming, Fragrance, Humectant, Viscosity Decreasing Agent, Hair Conditioning, Skin Protecting, Denaturant, Skin Conditioning
|
Brightening
Promotes Wound Healing
Hydrating
|
|
| 1 |
Sodium Hyaluronate
Skin Conditioning, Humectant
|
Promotes Wound Healing
Hydrating
|