JUST 5% Hyaluronic Acid Hydrating Fluid
JUST 5% Hyaluronic Acid Hydrating Fluid
Product Description
Product overview
A lightweight, fast-absorbing hydrating fluid with 5% Hyaluronic Acid and Panthenol (Pro-Vitamin B5) that deeply hydrates skin, reduces fine lines, and plumps for a fresher, smoother appearance. This minimalist European formula delivers professional-grade hydration at an affordable price.
Deep Hydration
5% Sodium Hyaluronate attracts and holds up to 1000x its weight in water, providing intense moisture retention throughout the day.
Texture & feel
SENSORYDeep Hydration
5% Sodium Hyaluronate attracts and holds up to 1000x its weight in water, providing intense moisture retention throughout the day.
Plumping Effect
Helps reduce the appearance of fine lines and wrinkles by plumping dehydrated skin from within for a smoother complexion.
Barrier Support
Panthenol (Pro-Vitamin B5) soothes and helps strengthen the skin barrier, promoting moisture retention and skin health.
Minimalist Formula
Only 8 essential ingredients - no fillers, fragrances, or irritants. Clean, effective, European-regulated skincare.
Safety & compatibility
SAFEContains no retinoids, salicylic acid, hydroquinone, or chemical sunscreens. Safe for use during pregnancy and nursing.
Free from ferments, fatty acids, esters, and polysorbates that can feed malassezia yeast. Verified FA-safe formula.
Fragrance-free, hypoallergenic formula with no common irritants. Dermatologically formulated for even reactive skin.
As with any new skincare product, perform a patch test on your inner arm 24 hours before first use, especially if you have very sensitive skin.
Ingredient breakdown
INGREDIENTSSodium Hyaluronate 5%Proven
The sodium salt form of hyaluronic acid - a powerful humectant naturally found in skin that can hold up to 1000 times its weight in water. This high 5% concentration delivers intense hydration.
- Mechanism: Draws moisture from the environment and deeper skin layers to hydrate the epidermis
- Clinical Evidence: Studies show significant improvement in skin hydration, elasticity, and wrinkle depth reduction
- Molecular Weight: Sodium hyaluronate penetrates more effectively than pure hyaluronic acid due to smaller molecular size
Panthenol (Pro-Vitamin B5) ~2%Proven
A powerful humectant and skin-conditioning agent that converts to Vitamin B5 (pantothenic acid) when absorbed. Widely used for its soothing and healing properties.
- Hydration: Attracts and holds moisture in the skin, enhancing barrier function
- Healing: Promotes wound healing and skin tissue repair
- Soothing: Anti-inflammatory properties help calm irritated or sensitive skin
Propylene Glycol ~2%Supporting
A lightweight humectant that helps ingredients penetrate the skin and enhances moisture retention. Also acts as a preservative booster.
- Function: Humectant, penetration enhancer, and solvent
- Safety: Cosmetically safe at typical concentrations, non-comedogenic rating of 0
8 ingredients
Water / Aqua, Sodium Hyaluronate, Propylene Glycol, Provitamin B5 / Panthenol, Xanthan Gum, PPG-1-PEG-9 Lauryl Glycol Ether, Phenoxyethanol, Disodium EDTA
Where it fits in your routine
ROUTINEApply after cleansing and toning on damp skin, before heavier serums and moisturizers. Can be used both AM and PM.
How to use
HOW TO USECleanse & Prep
Start with clean skin. Leave face slightly damp after cleansing or mist with toner - HA works best on moist skin.
Apply Drops
Dispense 4-5 drops onto fingertips. A little goes a long way - 3 drops for face, 4-5 for face, neck, and décolletage.
Gently Press In
Gently press and pat the fluid into skin rather than rubbing. This helps absorption and prevents tugging.
Wait & Layer
Wait 30-60 seconds until fully absorbed before applying next product. Always follow with a moisturizer to seal in hydration.
Who is it for?
WHOPerfect for you if:
- You have dehydrated or dry skin needing intense moisture
- You want to reduce the appearance of fine lines
- You prefer minimalist, no-fuss skincare formulas
- You're on a budget but want effective actives
- You have sensitive, reactive, or acne-prone skin
- You're pregnant or breastfeeding and need safe options
- You struggle with fungal acne (malassezia)
Consider alternatives if:
- You prefer thicker, more luxurious serum textures
- You want multiple HA molecular weights for multi-depth hydration
- You need additional anti-aging actives in one product
- You live in very dry/arid climates without using moisturizer after
- You prefer pump packaging over dropper bottles
Skin type compatibility
SKIN TYPESIdeal for dry skin types. 5% HA provides deep hydration. Always follow with moisturizer to lock in moisture.
Lightweight, oil-free formula absorbs quickly without adding shine or greasiness. Won't clog pores.
Balances hydration across different facial zones without overwhelming oily areas or neglecting dry patches.
Fragrance-free, minimal ingredients formula. Panthenol provides soothing benefits. Very low irritation potential.
Non-comedogenic rating of 0. Fungal acne safe. Oil-free formula won't trigger breakouts or feed acne-causing bacteria.
Results timeline
MONTH 2+Instant Hydration Boost
Skin feels instantly more hydrated and plump. Temporary smoothing of fine lines visible as skin absorbs moisture.
95% noticed immediate hydrationImproved Skin Texture
Sustained hydration begins to improve overall skin texture. Skin feels softer, smoother, and more supple throughout the day.
80% noticed softer skinVisible Plumping Effect
Consistent use shows visible reduction in fine lines and dehydration lines. Skin appears healthier and more radiant.
70% noticed reduced fine linesLong-Term Skin Health
Improved skin barrier function and moisture retention. Skin maintains hydration better throughout the day with continued use.
85% would repurchaseRatings by platform
702+ REVIEWSPros & cons
BALANCEDPraised
- High 5% HA concentration at budget price
- Lightweight, fast-absorbing formula
- Minimalist 8-ingredient formula
- Fungal acne and pregnancy safe
- No fragrance, silicones, or parabens
- Works well under makeup
- Visibly plumps and hydrates skin
- Suitable for all skin types including sensitive
Criticized
- Can feel slightly sticky/tacky before absorbing
- Single molecular weight HA (not multi-depth)
- Small 30ml bottle size
- Dropper packaging less hygienic than pump
- Needs moisturizer on top in dry climates
- Plain, utilitarian packaging
- Less widely available than major brands
Budget-friendly alternatives (dupes)
DUPESLower HA concentration (2% vs 5%) but includes multiple molecular weights for multi-depth hydration. Similar B5 content. More widely available.
Contains ceramides for barrier support plus HA. Gel-cream texture is thicker. MVE technology for extended release. More complex formula.
Contains hyaluronic acid plus trehalose for hydration. More complex formula with additional moisturizing ingredients. Widely available at drugstores.
Comparison with competitors
SIDE-BY-SIDEStorage & shelf life
12 MONTHS12 months after opening
Store in a cool, dry place away from direct sunlight. Can be refrigerated for a refreshing cooling effect.
Glass dropper bottle with pipette applicator for precise dispensing
Yes - 30ml is under the 100ml liquid limit for carry-on luggage
Frequently asked questions
FAQYes, this product is considered safe for use during pregnancy and breastfeeding. It contains no retinoids, salicylic acid, hydroquinone, chemical sunscreens, or other ingredients typically flagged as concerning during pregnancy. The simple formula of hyaluronic acid and panthenol has an excellent safety profile. However, as with any skincare product, consult your healthcare provider if you have specific concerns.
Yes, this product is verified fungal acne safe. It contains no ferments, fatty acids (C11-24), esters, polysorbates, or other ingredients that feed malassezia yeast. The minimalist 8-ingredient formula has been analyzed and confirmed FA-safe by ingredient checker databases including SkinSort and Folliculitis Scout.
Yes! Hyaluronic acid is one of the most versatile ingredients and pairs well with virtually everything. It can actually help buffer more irritating actives. Apply HA first on damp skin, let it absorb, then apply your retinol or vitamin C. For acids (AHA/BHA), apply the acid first, wait a few minutes, then apply HA to help replenish hydration. Do not combine with other REVOX B77 products containing HA (like Collagen Amino Acids + HA) as the concentration would be excessive.
This product is excellent for ALL skin types. It's especially beneficial for dry and dehydrated skin due to the high 5% HA concentration. Oily and acne-prone skin types will appreciate the lightweight, oil-free formula that hydrates without adding shine or clogging pores. Sensitive skin types benefit from the fragrance-free, minimalist formulation with soothing panthenol.
You'll notice immediate hydration and a plumping effect right after application. Within 1-2 weeks of consistent use, skin should feel noticeably softer and more supple. After 3-4 weeks, you may see visible improvement in fine lines, especially dehydration lines. For best results, use consistently twice daily and always follow with a moisturizer to seal in the hydration.
Apply after cleansing and toning, while skin is still slightly damp. This goes BEFORE heavier serums (like vitamin C or retinol), oils, and moisturizers. The rule is thinnest to thickest - and this watery fluid should be one of the first products after cleansing. Always finish with moisturizer to lock in the hydration, and sunscreen in the morning.
No, this product has a comedogenic rating of 0 out of 5 - the lowest possible. It contains no oils, silicones, or pore-clogging ingredients. Hyaluronic acid and panthenol are both non-comedogenic. The formula is oil-free and suitable for acne-prone skin. It will not cause or worsen breakouts.
The product has a PAO (Period After Opening) of 12 months. Once opened, use within one year for optimal efficacy. Store in a cool, dry place away from direct sunlight. If the product changes color, develops an unusual smell, or changes texture, discontinue use. The 30ml bottle typically lasts 2-3 months with twice-daily use.
Verdict: REVOX B77 JUST 5% Hyaluronic Acid Hydrating Fluid delivers impressive hydration at an unbeatable price point. The high 5% concentration of HA combined with soothing Panthenol makes this a solid choice for anyone seeking effective, no-frills hydration. While it lacks the multi-molecular weight complex of pricier alternatives and has a somewhat basic texture, the minimalist 8-ingredient formula is ideal for sensitive, acne-prone, and fungal acne sufferers. Best suited for those who prioritize clean, effective ingredients over luxury texture. Always follow with moisturizer for best results.
Product Overview
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.
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
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.
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
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.
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
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.
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
|
|
|
| 1 |
Sodium Hyaluronate
Skin Conditioning, Humectant
|
Promotes Wound Healing
Hydrating
|
|
| 3 |
Propylene Glycol
Solvent, Skin Conditioning, Fragrance, Humectant, Viscosity Controlling, Viscosity Decreasing Agent, Skin-Conditioningagent - Miscellaneous
|
Hydrating
|
|
| 1 |
Panthenol
Skin Conditioning, Antistatic Agent, Hair Conditioning
|
Promotes Wound Healing
Hydrating
Redness
Irritation
|
|
| 1 |
Xanthan Gum
Binding Agent, Emulsion Stabilising, Skin Conditioning, Surfactant -Emulsifying Agent, Viscosity Increasing Agent, Binding, Gel Forming, Viscosity Controlling
|
|








