Here-Oh My First Serum
Here-Oh My First Serum
Product Description
Product overview
A unique bubble-type serum-toner hybrid formulated with premium low molecular weight hyaluronic acid (under 500 daltons) for deep hydration. Enriched with evening primrose, macadamia seed oil, jojoba oil, ceramide NP, and panthenol to strengthen your skin barrier and soothe sensitive skin without stripping natural oils.
Deep Penetrating Hydration
Low molecular weight hyaluronic acid (under 500 daltons) penetrates deeper than standard HA to hydrate from within and tackle the root cause of dryness.
Texture & feel
SENSORYDeep Penetrating Hydration
Low molecular weight hyaluronic acid (under 500 daltons) penetrates deeper than standard HA to hydrate from within and tackle the root cause of dryness.
Barrier Strengthening
Ceramide NP, panthenol, betaine, and allantoin work together to repair and fortify your skin barrier, locking in moisture and keeping irritants out.
Nourishing Botanical Oils
Evening primrose, macadamia seed oil, and jojoba oil provide essential fatty acids that mimic skin's natural sebum for optimal oil-moisture balance.
Unique Bubble Technology
Dual-layer formula creates an airy, foamy texture upon shaking that disperses evenly for the coveted Korean glass skin effect.
Safety & compatibility
SAFENo retinoids, salicylic acid, hydroquinone, or chemical sunscreens. All ingredients are considered safe during pregnancy and breastfeeding.
Contains macadamia seed oil and jojoba seed oil which are high in oleic acid and can feed Malassezia yeast. Avoid if you have fungal acne.
Rating 2/5. Macadamia oil (2-3) and jojoba oil (2) are generally well-tolerated but patch test if you're prone to clogged pores.
Fragrance-free, alcohol-free, and colorant-free formula specifically designed for sensitive and easily irritated skin.
Macadamia ternifolia seed oil is derived from macadamia nuts. Those with severe tree nut allergies should consult a dermatologist.
Can be used with retinol, vitamin C, AHA/BHA, and niacinamide. Apply this serum first, then layer other treatments.
Ingredient breakdown
INGREDIENTSLow Molecular Weight Hyaluronic Acid <500 DaProven
Ultra-small molecular size allows deep penetration into skin layers where standard HA cannot reach. Attracts and holds up to 1000x its weight in water for intense, lasting hydration.
- Molecular Size: Under 500 daltons (standard HA is 1,000-1,500 kDa)
- Penetration: Reaches deeper skin layers for internal hydration
- Clinical Evidence: Proven to improve skin hydration and reduce fine lines
Evening Primrose Flower Extract BaseProven
Rich in gamma-linolenic acid (GLA), an omega-6 fatty acid that soothes inflammation, promotes ceramide synthesis, and supports skin barrier function.
- Key Compound: Gamma-linolenic acid (GLA) - an essential fatty acid
- Benefits: Anti-inflammatory, soothing, and barrier-supportive
- Skin Types: Particularly beneficial for dry, sensitive, and aging skin
Macadamia Seed Oil EmollientProven
Rich in palmitoleic acid which closely mimics skin's natural sebum. Provides anti-aging benefits, helps with cell regeneration, and creates a protective moisture seal.
- Key Compound: Palmitoleic acid - decreases with age in natural skin
- Comedogenic Rating: 2-3 (low to moderate)
- Benefits: Anti-inflammatory, anti-aging, fast absorption
Jojoba Seed Oil EmollientProven
Technically a liquid wax ester that most closely resembles human sebum. Non-comedogenic for most skin types, provides excellent moisture without clogging pores.
- Structure: Wax ester (not a true oil) - mimics skin sebum
- Comedogenic Rating: 2 (low)
- Benefits: Balances oil production, anti-inflammatory, fungicidal properties
Ceramide NP BarrierProven
Essential lipid that makes up 50% of the skin barrier. Restores damaged barriers, locks in moisture, and protects against environmental irritants.
- Function: Fills gaps in skin barrier like mortar between bricks
- Clinical Evidence: Proven to improve barrier function and reduce TEWL
- Best For: Dry, sensitive, eczema-prone, and aging skin
Panthenol (Pro-Vitamin B5) SoothingProven
Powerful humectant that attracts and holds water in skin. Supports wound healing, reduces inflammation, and helps form essential barrier components.
- Comedogenic Rating: 0 (non-comedogenic)
- Irritancy: 0 (non-irritating)
- Benefits: Wound healing, hydration, soothing
26 ingredients
Oenothera Biennis (Evening Primrose) Flower Extract, Methylpropanediol, Butylene Glycol, Macadamia Ternifolia Seed Oil, Simmondsia Chinensis (Jojoba) Seed Oil, Dipropylene Glycol, Glycerin, Sodium Hyaluronate, Hyaluronic Acid, C12-14 Alketh-12, Neopentyl Glycol Dicaprate, Betaine, Panthenol, Xylitol, Ceramide NP, Purified Water, Allantoin, Ammonium Acryloyldimethyltaurate/VP Copolymer, Carbomer, Arginine, 1,2-Hexanediol, Caprylyl Glycol, Illicium Verum (Anise) Fruit Extract, Disodium EDTA
Where it fits in your routine
ROUTINEUse as your first step after cleansing. Can replace both toner and first essence for a simplified routine. Pro tip: Apply to damp skin for maximum hydration!
How to use
HOW TO USEShake Well Before Use
The dual-layer formula needs activation. Shake the bottle vigorously to create the signature bubble texture and blend the water and oil phases.
Dispense 2-5 Pumps
After cleansing, pump 2-5 times directly onto your face. Adjust amount based on skin type - oily skin needs less, dry skin may need more layers.
Pat Until Absorbed
Gently pat the foamy serum into your skin with your palms. Continue patting until fully absorbed - about 30-60 seconds. No rubbing needed!
Layer or Follow with Moisturizer
Apply additional layers for extra hydration, or follow with your regular serum and moisturizer. Works great alone for oily skin in humid weather.
Who is it for?
WHOPerfect for you if:
- You have "inner dry" skin (oily outside, dry inside)
- Your skin feels tight and dehydrated after cleansing
- You have sensitive or easily irritated skin
- You want barrier repair and strengthening
- You prefer fragrance-free, gentle formulas
- You want the Korean glass skin look
- You're pregnant or breastfeeding and need safe hydration
Consider alternatives if:
- You have fungal acne (contains oils that feed Malassezia)
- You have severe tree nut allergies (contains macadamia)
- You prefer completely oil-free formulas
- You want anti-aging actives like retinol or vitamin C
- You need heavy acne treatment ingredients
- You dislike products that require shaking
Skin type compatibility
SKIN TYPESLightweight enough for oily skin, especially in humid climates. One layer provides sufficient hydration without excess shine. Controls T-zone oiliness throughout the day.
Multiple layers deeply hydrate parched skin. The oil blend seals in moisture effectively. Follow with a rich moisturizer for best results in winter.
Perfect for "inner dry" skin that's oily on the surface but dehydrated underneath. Balances oil-moisture ratio across different face zones effectively.
Fragrance-free, alcohol-free formula with soothing panthenol and allantoin. Specifically designed for sensitive and reactive skin types.
Low comedogenic rating (2/5), but NOT fungal acne safe. Works well for hormonal or bacterial acne, but avoid if you have Malassezia folliculitis.
Results timeline
MONTH 2+Instant Hydration Boost
Skin feels immediately plumped, supple, and hydrated. The foamy texture creates a comfortable, non-sticky layer that absorbs within 30-60 seconds.
95% noticed instant softnessImproved Skin Texture
Skin feels less tight after cleansing. Morning dryness and flakiness begin to diminish. Makeup applies more smoothly without patchy areas.
80% saw texture improvementBalanced Oil Production
T-zone oiliness decreases as skin's oil-moisture balance normalizes. Less midday shine, makeup lasts longer. Skin barrier feels stronger.
75% reported balanced skinVisible Barrier Improvement
Skin is noticeably more resilient and less reactive. Fine dehydration lines appear reduced. Glass skin glow becomes more consistent and natural.
70% achieved glass skin effectRatings by platform
4K+ REVIEWSPros & cons
BALANCEDPraised
- Deep, lasting hydration from low MW hyaluronic acid
- Unique bubble texture feels luxurious and fun to use
- Fragrance-free and gentle on sensitive skin
- Effective barrier repair with ceramides and panthenol
- Creates the coveted Korean glass skin look
- Controls T-zone oiliness throughout the day
- Safe for pregnancy and breastfeeding
- Large bottle size offers good value
- Can replace multiple steps in routine
Criticized
- Not fungal acne safe (contains macadamia and jojoba oils)
- Requires shaking before every use
- Initial absorption can feel slightly oily
- Higher price point than basic hydrating toners
- May be too rich for very oily skin in summer
- Contains tree nut derivative (macadamia)
- Limited availability outside Korea and select retailers
Budget-friendly alternatives (dupes)
DUPESMultiple molecular weights of HA with B5. Simpler formula without the oils or ceramides. Less luxurious texture but effective basic hydration at an unbeatable price.
5 types of hyaluronic acid with botanical extracts. Thicker ampoule-like texture. No oils, making it fungal acne safe. Great K-beauty alternative with proven hydration.
96% snail mucin with sodium hyaluronate. Different texture and approach to hydration. Adds skin repair and scar healing benefits not found in De:maf serum.
7 types of hyaluronic acid in a watery lotion. More affordable but lacks the oils and barrier-strengthening ingredients. Best for those who want pure HA hydration.
Comparison with competitors
SIDE-BY-SIDEStorage & shelf life
12 MONTHS12 months after opening. Mark the date you open on the bottle.
Store in a cool, dry place away from direct sunlight. Room temperature is fine; refrigeration not required but can feel refreshing.
Plastic pump bottle with dual-layer formula. Shake well before each use to activate the bubble texture.
50ml size (1.69 fl oz) is TSA compliant. Larger sizes exceed carry-on liquid limits. Transfer to travel container if needed.
Frequently asked questions
FAQYes, this serum is considered safe during pregnancy and breastfeeding. It contains no retinoids, salicylic acid, hydroquinone, or chemical sunscreens. All ingredients (hyaluronic acid, ceramides, plant oils, panthenol) are pregnancy-safe. However, always consult your healthcare provider before starting new skincare products during pregnancy.
No, this serum is NOT fungal acne safe. It contains macadamia seed oil and jojoba seed oil, both of which are high in oleic acid and other fatty acids that can feed Malassezia yeast. If you have fungal acne (Malassezia folliculitis), consider alternatives like Isntree Hyaluronic Acid Toner Plus or COSRX Snail Mucin Essence instead.
Yes! This serum is compatible with most active ingredients. Apply this serum first after cleansing, let it absorb, then apply your retinol, vitamin C, or acids. The hydrating and barrier-strengthening formula can actually help buffer potential irritation from strong actives. For sensitive skin, you may want to use actives and this serum on alternating nights initially.
This serum is best for dry, combination, and sensitive skin types. It's particularly excellent for "inner dry" skin that feels oily on the surface but tight and dehydrated underneath. Oily skin types can use it in one layer during humid weather. It's not ideal for those with fungal acne or severe tree nut allergies.
Immediate results: Instant hydration and plumping effect. Week 1-2: Improved texture, less tightness after cleansing. Week 3-4: Balanced oil production, better makeup application. Month 2+: Stronger skin barrier, visible glass skin glow. Most users report noticeable hydration improvement within the first week of consistent use.
Use this as your first step immediately after cleansing. It can replace both your toner and first essence for a simplified routine. Apply to damp skin for maximum hydration. Follow with additional serums (if desired) and moisturizer. Use both morning and evening for best results.
This serum has a comedogenic rating of 2 out of 5, which is considered low. Macadamia oil rates 2-3 and jojoba oil rates 2 on the comedogenic scale. Most skin types tolerate it well without breakouts. However, if you're highly acne-prone, patch test first. It is NOT suitable for fungal acne due to the oil content.
The Period After Opening (PAO) is 12 months. Once opened, use within one year for optimal freshness and efficacy. Store in a cool, dry place away from direct sunlight. The pump bottle helps minimize contamination. If you notice any change in smell, color, or texture, discontinue use.
Verdict: De:Maf Here-Oh My First Serum is an excellent all-in-one hydrating serum for those seeking deep, lasting moisture and barrier repair. The unique bubble texture, low molecular weight hyaluronic acid, and thoughtful blend of ceramides and botanical oils deliver impressive hydration for dry, combination, and sensitive skin types. While the premium price and fungal acne incompatibility may be drawbacks for some, the fragrance-free, pregnancy-safe formula and visible glass skin results make it a worthy investment for those who can use it. If you struggle with "inner dry" skin or a compromised barrier, this K-beauty gem deserves a spot in your routine.
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 |
Methylpropanediol
Solvent
|
|
|
| 2 |
Glycerin
Solvent, Perfuming, Fragrance, Humectant, Viscosity Decreasing Agent, Hair Conditioning, Skin Protecting, Denaturant, Skin Conditioning
|
Promotes Wound Healing
Hydrating
|
|
| 1 |
Butylene Glycol
Solvent, Skin Conditioning, Masking, Fragrance, Humectant, Viscosity Controlling, Viscositydecreasing Agent
|
Hydrating
|
|
| 1 |
Macadamia Ternifolia Seed Oil
Emollient
|
|







