Cetaphil Deep Hydration 48 Hour Serum – Clinically Tested Fragrance Free Formula for Reactive Skin
Why you'll love it
- 48-hour continuous hydration reduces the need for frequent reapplication
- Fragrance-free formula protects sensitive skin from irritation and allergic reactions
- Dermatologist recommended brand builds trust for cautious or first-time serum buyers
- Lightweight, fast-absorbing texture layers easily without pilling under makeup or sunscreen
- Non-comedogenic formula won't clog pores, appealing to combination and acne-prone skin types
- Trusted actives (hyaluronic acid, vitamin B5, vitamin E) deliver visible results without harshness
Perfect for
- Layering under a daily moisturizer to boost hydration for sensitive skin
- Standalone lightweight serum application for those who prefer minimal skincare steps
- Soothing dry, flaky, or dehydrated skin during seasonal changes or travel
- Morning prep serum before sunscreen and makeup to create a smooth base











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Product Information
CETAPHIL DEEP HYDRATION 48 HOUR ACTIVATION SERUM: Exclusive HYDROSENSITIVE complex deepens dynamic hydration and soothes skin sensitivity
DEEPLY REPLENISHES SKIN'S HYDRATION FOR 48 HOURS: Rehydrates skin to restore the appearance and improve the quality of sensitive skin over time
INSTANTLY ABSORBS AND IS LAYERABLE: lightweight serum can be used alone or layered under face lotion or cream to provide a deep boost to skin's hydration
IDEAL FOR DRY AND DEHYDRATED SKIN: Formulated with hyaluronic acid, sunflower seed oil, vitamin B5 and antioxidant rich vitamin E to rehydrate and soothe
DESIGNED FOR SENSITIVE SKIN: Effective yet gentle skin care that won't clog pores or irritate skin; features a gentle scent & clinically tested on sensitive skin
CETAPHIL DEEP HYDRATION 48 HOUR ACTIVATION SERUM instantly absorbs to deeply replenish skin's hydration for 48 hours and improve the overall quality of sensitive skin. Features HydroSensitiv Complex which deepens dynamic hydration and soothes skin sensitivity. This lightweight serum also includes hyaluronic acid, sunflower seed oil, vitamin B5 and antioxidant rich vitamin E to rehydrate and restore skin's appearance while soothing dry skin and dehydrated skin. Can be used alone or layered under face lotion or cream to provide a deep boost to skin's hydration. Designed for sensitive skin, effective yet gentle skin care that won't clog pores or irritate skin; fragrance-free & clinically tested on sensitive skin. DERMATOLOGIST RECOMMENDED for Sensitive Skin.
Items Details
Features & Specs
Skin Type: Combination, Dry, Mature, Normal, Sensitive
Product Benefits: Antioxidant, Hydrating, Moisturizing, Replenishing, Soothing
Target Use Body Part: Face
Scent Name: Unscented
Special Ingredients: Hyaluronic Acid
Item Form: Serum
Frequently Asked Questions
Is this serum safe for sensitive or reactive skin?
Yes, the Cetaphil Deep Hydration Serum is specifically formulated for sensitive skin. It is fragrance free, hypoallergenic, non comedogenic, and clinically tested on sensitive skin types to minimize the risk of irritation or allergic reaction.
Has this formula been dermatologist tested?
Yes, Cetaphil is a dermatologist recommended brand and the Deep Hydration Serum is clinically tested on sensitive skin. The testing process is part of why this product is widely trusted by dermatologists for daily hydration.
Is the serum safe to use around the eyes?
The serum is gentle enough to be applied around the orbital area, although you should always avoid direct contact with the eyes. If any product gets into the eye, rinse thoroughly with water.
Can teenagers or younger users safely use this serum?
Because the formula is fragrance free, non comedogenic, and free of harsh exfoliants, it is generally well tolerated by younger users with sensitive skin. However, parents should review the ingredient list and consult a pediatrician or dermatologist for children under 12.
Is this serum safe for pregnant or nursing users?
The formula does not contain retinoids, salicylic acid, or other ingredients typically flagged for caution during pregnancy or nursing. That said, it is always best to consult your OB GYN or dermatologist before introducing any new skincare product during this period.
Does this serum contain any ingredients commonly associated with allergic reactions?
The formula is intentionally simple and free of added fragrance, parabens, and common irritants. It does contain sunflower seed oil and panthenol, which are well tolerated by most users, but anyone with a known allergy to these should review the full ingredient list first.
How does this serum compare to using just a plain moisturizer for sensitive skin?
Unlike a basic moisturizer that simply sits on the skin, this serum uses targeted actives like hyaluronic acid and panthenol to actively repair the barrier. It is also fragrance free, which is critical for sensitive skin safety.
How does this serum compare to retinol or acid based serums for sensitive skin?
Retinol and acid based serums can be effective but are often too harsh for sensitive or reactive skin. This serum is a much safer daily option that delivers hydration and barrier support without the irritation, peeling, or sun sensitivity those actives can cause.
Is this serum safer for daily use than a product with fragrance or essential oils?
Yes, fragrance and essential oils are among the most common causes of contact dermatitis and allergic reactions in skincare. Eliminating them makes this serum a meaningfully safer choice for daily use on sensitive or compromised skin.
What if my skin reacts to this serum, is there a return policy?
Cetaphil stands behind its formulations, and most major retailers offer satisfaction guarantees or return windows. If you experience any reaction, stop use immediately and consult a dermatologist, then contact the retailer for a refund or exchange.
Is this serum safe to layer with prescription skincare like tretinoin or benzoyl peroxide?
The gentle, hydrating formula is often used alongside prescription treatments to help counteract dryness and irritation. However, you should always follow your dermatologist's specific layering instructions, and introduce products one at a time to monitor for reactions.
Is the bottle safe and secure to keep around children or pets?
The bottle has a secure cap and is not a flame, heat, or sharp object hazard. As with any skincare product, it should still be stored out of reach of young children and pets to prevent accidental ingestion.
Will this serum sting if my skin barrier is currently compromised?
The formula is designed to soothe compromised skin, and most users do not experience stinging. If you have a recent sunburn, active eczema flare, or open wound, it is best to wait until the skin has calmed before applying any new product.
Is the serum non comedogenic and safe for acne prone skin?
Yes, the formula is non comedogenic, which means it has been tested and shown not to clog pores. It is a safe daily hydration choice for acne prone or combination skin types.
Does the serum undergo any third party safety testing?
Cetaphil products are developed under strict dermatological and clinical testing protocols. The Deep Hydration Serum has been clinically tested on sensitive skin, and the brand is widely recommended by dermatologists worldwide.
Can I use this serum on areas other than my face?
Yes, the gentle formula can be used on the neck, décolletage, and other areas where dry, sensitive skin is a concern. It absorbs well and is non comedogenic, so it should not cause breakouts even on the chest or back.
How do I use the Cetaphil Deep Hydration Serum in my routine?
Apply 2 to 3 drops to clean, slightly damp skin morning and night. Gently press the serum into the face and neck, then follow with your favorite moisturizer. In the morning, finish with a broad spectrum sunscreen.
Can I use this serum both morning and night?
Yes, the serum is designed for twice daily use. In the morning it creates a hydrated base for sunscreen and makeup, and at night it supports skin repair while you sleep.
Should I apply this serum before or after moisturizer?
Apply the serum first, on clean skin, and follow with your moisturizer. Serums are formulated with smaller molecules that penetrate best when applied directly to the skin, while moisturizers seal everything in.
Is this serum compatible with retinol, vitamin C, or exfoliating acids?
Yes, the gentle, fragrance free formula is compatible with most active ingredients. Apply this hydrating serum first, then layer your active treatment, and finish with a moisturizer. If you are new to actives, introduce one product at a time.
Can I use this serum with sunscreen and makeup?
Absolutely. The lightweight, fast absorbing texture layers seamlessly under broad spectrum sunscreen and makeup without pilling or leaving a greasy residue, which is one of its most popular features.
What comes in the box when I order the serum?
Your order includes one 1 fl oz bottle of Cetaphil Deep Hydration 48 Hour Activation Serum with the product information printed on the packaging. No additional accessories are required for use.
Is this serum safe for sensitive skin?
Yes, the formula is specifically developed for sensitive and reactive skin. It is fragrance free, hypoallergenic, non comedogenic, and clinically tested to minimize the risk of irritation.
Will this serum cause breakouts or clogged pores?
No, the formula is non comedogenic, meaning it is designed not to clog pores. It is well tolerated by combination, oily, and acne prone skin types when used as directed.
What is the difference between a serum and a moisturizer?
A serum is a lightweight, concentrated treatment that delivers active ingredients such as hyaluronic acid or vitamins deep into the skin, while a moisturizer is designed to seal in hydration and reinforce the skin barrier. Serums and moisturizers work best when layered together, with the serum applied first.