
Highlights
WHAT IS IT?
Hyaluronic acid serum with multi-weight hyaluronic acid
FEATURES
Lightweight, quick-absorbing, non-greasy, improves moisture retention and regeneration
BEST FOR
dry
CHECKS
FRAGRANCE-FREE, NO SYNTHETIC COLORS, PARABEN FREE, ALCOHOL FREE
Who Is It For?
All Ages All GendersWhat Does It Help With?
Hydration Plumping Fine Lines Skin Moisture RetentionBudget
Mid-range ($30-$75)How To Use
Which routine should it be used in?
Instructions:
Key Information
What Medik8 Says
Product Description:
Infuse your skin with long-lasting hydration with Hydr8 B5. Medik8's original hyaluronic acid serum floods the skin with multi-weight hyaluronic acid to leave it visibly plumped and supple, while effortlessly softening the look of fine lines. The lightweight, oil-free serum absorbs quickly for fast visible results that won't leave the complexion feeling greasy.
About the Brand:
Ingredients Overview
Ingredients List
Aqua (Water), Panthenol, Sodium Hyaluronate, Calcium Pantothenate, Phenoxyethanol, Ethylhexylglycerin, Citric Acid
Key Ingredients
hyaluronic acid, vitamin b5
Ingredients Details
Calcium Pantothenate
Common Name(s): Calcium pantothenate,cosmetic active,functional ingredient
CAS Number: N/a
DESCRIPTION
What It Does: Delivers characteristic cosmetic function — skin conditioning, protection, preservation, or active biological benefit — at recommended use concentration.
Why It's Used: Selected for its functional contribution and formulation compatibility — supported by cosmetic science literature and regulatory safety assessment.
How It Works: Works through the mechanism of its molecular class — physicochemical interaction with the formulation or biological interaction with skin proteins, lipids, or receptors as documented in peer-reviewed literature.
Typically Found In: Skin care formulations
TECHNICAL DETAILS
Primary Category: Active ingredient – cosmetic active
Secondary Functions: Skin conditioning
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.1%–10%
SOURCING & ETHICS
Vegan Status: Conditional
Halal Status: Yes
Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 – very low
Comedogenicity Rating: 0/5 – non-comedogenic
Sensitivity Concerns: Well-tolerated by most skin types.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.
Works Well With: Standard skincare actives
Avoid Combining With: No known significant incompatibilities
SCIENTIFIC NOTE
Calcium pantothenate delivers documented functional benefit with an established safety profile within the cosmetic regulatory framework (cosing eu, cir usa).
Last Verified: Cosing database,calcium pantothenate technical literature
Primary Sources: 2026-03-12
Citric Acid
Common Name(s): Lemon acid,2-hydroxypropane-1,2,3-tricarboxylic acid
CAS Number: 77-92-9
DESCRIPTION
What It Does: Adjusts ph to optimal ranges, chelates destabilizing metal ions, provides mild exfoliation at higher concentrations.
Why It's Used: Universal cosmetic ph adjuster and chelating agent. aha exfoliant activity is secondary.
How It Works: As ph adjuster, donates protons. as chelating agent, three carboxylic groups bind divalent metals (ca²⁺, mg²⁺, fe²⁺) preventing oxidative degradation.
Typically Found In: Nearly all cosmetic formulations,brightening products,exfoliants
TECHNICAL DETAILS
Primary Category: Active ingredient – alpha hydroxy acid (aha)
Secondary Functions: Chelating agent,ph adjustment,preservation enhancement
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.1%–10%
SOURCING & ETHICS
Vegan Status: Yes – synthetic or fermentation-derived
Halal Status: Yes
Source Notes: Produced by fermentation of sugars by aspergillus niger. gras (e330). most abundant organic acid in citrus.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 – very low at low concentrations; 2/5 at exfoliant concentrations
Comedogenicity Rating: 0/5 – non-comedogenic
Sensitivity Concerns: Photosensitizing – mandatory spf use. start at low frequency.
Safe for Sensitive Skin: Use with caution – spf required
SAFETY & COMPATIBILITY
Safety Profile: Safe at otc concentrations. eu: ≤10% leave-on at ph ≥3.5. mandatory spf advisory.
Works Well With: Niacinamide,ceramides,hyaluronic acid,spf
Avoid Combining With: Retinol in same step; multiple exfoliants simultaneously
SCIENTIFIC NOTE
Three carboxylic acid groups provide multiple proton donation sites and stronger chelation than monocarboxylic ahas. this makes citric acid the preferred cosmetic chelating agent alongside edta.
Last Verified: Cosing database,cir safety assessment,ewg skin deep
Primary Sources: 2026-03-12
Ethylhexylglycerin
Common Name(s): Octylglycerin,2-ethylhexyl glycerol ether,sensiva sc 10
CAS Number: 70445-33-9
DESCRIPTION
What It Does: Provides antimicrobial skin conditioning with deodorant activity and preservation system enhancement.
Why It's Used: Multifunctional clean beauty preservation active — ethylhexylglycerin provides antimicrobial, deodorant, and skin conditioning in a single ingredient accepted in most natural cosmetic certification schemes.
How It Works: Glycerol ether provides antimicrobial via bacterial membrane phospholipid disruption. deodorant activity via reduction of underarm lipase enzyme activity (similar mechanism to triethyl citrate). skin conditioning from glycerol humectant component. synergistic with phenoxyethanol and diols.
Typically Found In: Natural preservation systems,deodorants,skin conditioning products
TECHNICAL DETAILS
Primary Category: Functional ingredient – antimicrobial glycerol ether
Secondary Functions: Skin conditioning
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.1%–0.5%
SOURCING & ETHICS
Vegan Status: Yes – synthetic
Halal Status: Yes
Source Notes: Commercially produced for cosmetic use. verify vegan/halal status with supplier.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 – very low
Comedogenicity Rating: 0/5 – non-comedogenic
Sensitivity Concerns: Well-tolerated by most skin types.
Safe for Sensitive Skin: Yes
SAFETY & COMPATIBILITY
Safety Profile: Good safety profile at recommended concentrations. ewg score: 1–2.
Works Well With: Standard skincare actives
Avoid Combining With: No known significant incompatibilities
SCIENTIFIC NOTE
Ethylhexylglycerin's deodorant mechanism is pharmacologically identical to triethyl citrate: both inhibit skin surface microbial lipase enzymes that convert odourless triglycerides to odorous free fatty acids. the glycerol ether structure of ethylhexylglycerin, combined with the 2-ethylhexyl chain, provides lipase inhibition similar to ester-based lipase inhibitors from a different chemical class.
Last Verified: Cosing database,schülke sensiva sc 10 technical data,cir safety assessment
Primary Sources: 2026-03-12
Panthenol
Common Name(s): Provitamin b5,d-panthenol,dl-panthenol,d-pantothenyl alcohol,(r)-2,4-dihydroxy-n-(3-hydroxypropyl)-3,3-dimethylbutanamide
DESCRIPTION
What It Does: Panthenol deeply moisturizes skin and hair, soothes irritation, accelerates wound healing, strengthens the skin barrier, and improves hair elasticity and shine.
Why It's Used: It is used because it is exceptionally versatile, working in both skin and hair formulations. it is gentle enough for sensitive and post-procedure skin, and converts to the active vitamin b5 within the skin.
How It Works: Panthenol penetrates skin and hair, where it is oxidized to pantothenic acid (vitamin b5), a coenzyme a precursor essential to metabolism. in skin, it acts as a humectant and stimulates fibroblast proliferation. in hair, it coats the shaft, improving manageability.
Typically Found In: Moisturizers,serums,toners,after-sun products,wound healing products,shampoos,conditioners,hair masks,beard care
TECHNICAL DETAILS
Primary Category: Active ingredient – provitamin b5
Secondary Functions: Anti-inflammatory,wound healing,hair conditioning
Application Areas:
Facial Skincare
Body Care
Hair Care
Beard Care
Color Cosmetics (Makeup)
Dietary/Oral Supplements
Typical Concentration Range: 0.5%–5% (typical: 1–3%)
SOURCING & ETHICS
Vegan Status: Yes – synthetically produced
Halal Status: Yes
Source Notes: Commercially synthesized. both d- and dl-forms used in cosmetics; d-panthenol is the biologically active isomer but dl-panthenol is less expensive and widely used.
SKIN COMPATIBILITY
Irritancy Rating: 1/5 – very low; one of the most soothing ingredients in cosmetics
Comedogenicity Rating: 0/5 – non-comedogenic
Sensitivity Concerns: Extremely rare contact allergy; considered one of the safest cosmetic ingredients. suitable for all skin types.
Safe for Sensitive Skin: Yes – ideal for sensitive, reactive, and post-procedure skin
SAFETY & COMPATIBILITY
Safety Profile: Exceptionally safe. ewg hazard score: 1. no significant concerns for irritation, sensitization, or systemic toxicity. safe during pregnancy.
Works Well With: Hyaluronic acid,ceramides,allantoin,niacinamide,centella asiatica,retinol (reduces irritation),glycerin
Avoid Combining With: No known significant incompatibilities
SCIENTIFIC NOTE
Panthenol has demonstrated wound-healing properties in clinical studies, stimulating fibroblast proliferation and migration. its dual humectant and anti-inflammatory action makes it particularly effective in barrier-repair formulations.
Last Verified: Cosing database,cir safety assessment,ebner et al. (2002) skin pharmacology and applied skin physiology
Primary Sources: 2026-03-12