Vitamin C Serum
Vitamin C Serum
Product Description
A lightweight, fast-absorbing vitamin C serum with double brightening actives that helps even skin tone, fade dark spots, and protect against free radicals. Formulated with stable Sodium Ascorbyl Phosphate (2%) and Niacinamide (2%) for visible results in 14 days.
โจ Texture & Feel
Double Brightening Action
Combines stable Vitamin C (SAP) with Niacinamide to target dullness and uneven skin tone from multiple angles.
Antioxidant Protection
Shields skin from UV damage, blue light, and environmental pollutants that cause premature aging.
Hydration Boost
Glycerin, Betaine, and Urea work together to attract and lock in moisture for plump, supple skin.
Gentle Formula
Sodium Ascorbyl Phosphate is a stable, non-irritating form of Vitamin C suitable for sensitive skin.
๐ก๏ธ Safety & Compatibility
Contains Sodium Ascorbyl Phosphate, a gentle Vitamin C derivative confirmed safe for use during pregnancy and breastfeeding. No retinoids, hydroquinone, or other restricted ingredients.
Contains Glycine Soja Sterols (soybean-derived) which may potentially feed Malassezia yeast. Patch test recommended if you're prone to fungal acne.
Rated 1/5 on comedogenic scale. Water-based formula with no heavy oils or pore-clogging ingredients makes it safe for acne-prone skin.
Light citrus scent from parfum. If you have extremely sensitive or reactive skin, perform a patch test first.
๐ฌ Ingredient Breakdown
๐ Sodium Ascorbyl Phosphate 2% Proven
A stable, water-soluble derivative of Vitamin C that converts to active ascorbic acid in the skin. Gentler than pure L-ascorbic acid while still delivering brightening, antioxidant, and anti-aging benefits.
- Brightening: Inhibits melanin production to fade dark spots and even skin tone
- Anti-Acne: 2005 study showed 1% SAP has antimicrobial activity against P. acnes bacteria
- Collagen Boost: Stimulates collagen synthesis for firmer, more elastic skin
- Stability: Remains effective at neutral pH (~7), unlike L-ascorbic acid which needs low pH
โจ Niacinamide 2% Proven
A multitasking form of Vitamin B3 that strengthens skin barrier, reduces inflammation, and works synergistically with Vitamin C for enhanced brightening effects.
- Barrier Support: Increases ceramide synthesis for stronger, healthier skin
- Oil Control: Regulates sebum production to minimize shine
- Pore Minimizing: Helps reduce appearance of enlarged pores over time
- Anti-Aging: Improves fine lines and wrinkles at concentrations of 4-5%
๐ง Glycerin & Humectants High Proven
A powerhouse hydration trio: Glycerin, Urea, and Betaine work together to attract and retain moisture in the skin.
- Glycerin: 2016 study found it more effective than hyaluronic acid as a humectant
- Urea: Natural moisturizing factor (NMF) component that softens and smooths skin
- Betaine (1%): Sugar beet-derived osmolyte that protects cells from dehydration
๐ Biosaccharide Gum-1 (Fucogel) Present Promising
A patented algae-derived ingredient (marketed as Fucogel) that provides immediate and long-lasting moisturization with anti-aging benefits.
- Soothing: Calms irritated and sensitive skin
- Hydrating: Creates a moisture-locking film on skin surface
- Anti-Aging: Helps improve skin elasticity and firmness
๐ฉน Allantoin Present Proven
A gentle, well-tolerated ingredient known for its soothing and skin-conditioning properties.
- Anti-Inflammatory: Reduces redness and irritation
- Cell Regeneration: Promotes healthy skin cell turnover
- Protective: Forms a protective barrier on skin surface
25 ingredients
Aqua, Glycerin, Butylene Glycol, Sodium Ascorbyl Phosphate (2%), Niacinamide (2%), Urea, Betaine (1%), Biosaccharide Gum-1, Ethoxydiglycol, Phenoxyethanol, Citric Acid, Carbomer, Allantoin, Xanthan Gum, Parfum, Triethylene Glycol, Aminomethyl Propanol, Disodium EDTA, Sodium Metabisulfite, Hydrogenated Lecithin, CI 15985, Glycine Soja Sterols, Sodium Polygamma-Glutamate, 2-Aminobutanol, Chlorphenesin
๐ Where It Fits in Your Routine
Use AM and/or PM. Always follow with SPF 30+ sunscreen during daytime use.
๐ How to Use
Cleanse & Tone
Start with clean, slightly damp skin. Apply your favorite toner if using one.
Dispense 2-3 Drops
Using the dropper, place 2-3 drops onto your fingertips or directly onto face. Keep dropper 1cm from skin to avoid contamination.
Pat & Press
Gently pat and press the serum into skin, covering face and neck. Avoid rubbing to maximize absorption.
Follow Up
Wait 30 seconds for absorption, then apply moisturizer. In the morning, always finish with SPF 30+ sunscreen.
๐ค Who Is It For?
โ Perfect for you if:
- You want to brighten dull, tired-looking skin
- You're new to Vitamin C serums and need a gentle formula
- You have post-acne marks or uneven skin tone
- You're pregnant/breastfeeding and need safe brightening options
- You're on a budget but want effective skincare
- You have oily or combination skin
โ Consider alternatives if:
- You need high-potency Vitamin C (10%+ L-ascorbic acid)
- You have severe hyperpigmentation requiring stronger actives
- You're prone to fungal acne (contains soy sterols)
- You're extremely sensitive to any fragrance
- You want anti-aging as primary concern (try retinol instead)
๐ฏ Skin Type Compatibility
Lightweight, watery texture absorbs quickly without adding shine. Niacinamide helps regulate oil production.
Provides hydration via glycerin and betaine, but may need a richer moisturizer on top for very dry skin.
Balances well across different face zones. Light enough for T-zone, hydrating enough for cheeks.
Gentle SAP formula is well-tolerated. Contains fragrance, so patch test if extremely reactive.
Low comedogenic rating (1/5). SAP has antibacterial properties against acne bacteria. Watch for fungal acne concerns.
๐ Results Timeline
Immediate Hydration & Glow
Skin feels more hydrated, supple, and has a healthy dewy glow. Some users notice improved skin texture.
85% noticed hydration improvementBrighter, More Even Tone
Overall complexion appears brighter and more radiant. Light post-acne marks begin to fade. Brand claims visible brightening in 14 days.
70% noticed brightening effectsVisible Dark Spot Reduction
Noticeable fading of hyperpigmentation, sun spots, and acne scars. Skin tone appears more uniform.
60% noticed dark spot improvementLong-Term Skin Health
Continued improvement in skin texture, clarity, and resilience. Best results with consistent daily use combined with sunscreen.
75% reported overall skin improvementโญ Ratings by Platform
โ๏ธ Pros & Cons
โ Praised
- Extremely affordable price point
- Lightweight, fast-absorbing texture
- Gentle formula suitable for beginners
- Visible brightening results in 2 weeks
- Pregnancy and breastfeeding safe
- No irritation or stinging sensation
- Halal certified and BPOM approved
- Leaves skin feeling fresh and hydrated
โ Criticized
- Low Vitamin C concentration (2%)
- Small bottle size (20ml)
- Slight sticky feeling for some users
- Contains fragrance (parfum)
- May not be fungal acne safe
- Results slower than high-potency serums
- Limited international availability
๐ฐ Budget-Friendly Alternatives (Dupes)
Higher concentration (12%) stable Vitamin C derivative. Similar gentle approach but without niacinamide. Water-based, fragrance-free formula.
Also uses Sodium Ascorbyl Phosphate. Fungal acne safe, adds Ferulic Acid and Vitamin E for enhanced antioxidant protection. Fragrance-free.
Japanese formula using pure Ascorbic Acid. More potent for spot treatment, tube packaging prevents oxidation. Oil-based texture.
Much higher potency (20% L-ascorbic acid). SkinCeuticals CE Ferulic dupe. More effective but also more irritating potential.
๐ Comparison with Competitors
Hanasui Vitamin C Serum
~$2-3The Ordinary Vitamin C 23% + HA
$5.80Melano CC Vitamin C Essence
$12.00Timeless 20% Vitamin C + E Ferulic
$26.00๐ฆ Storage & Shelf Life
12 months after opening. SAP is more stable than L-ascorbic acid, but use within 1 year for best results.
Store in a cool, dry place away from direct sunlight. Refrigeration recommended for extended freshness.
Glass dropper bottle. Keep cap tightly closed after each use to prevent oxidation.
Yes, 20ml is under the 100ml TSA liquid limit. Use a protective case for glass bottle.
โ Frequently Asked Questions
Yes, Hanasui Vitamin C Serum is safe during pregnancy and breastfeeding. It contains Sodium Ascorbyl Phosphate (SAP), a gentle and stable form of Vitamin C that is widely considered safe for use during pregnancy. The formula does not contain retinoids, hydroquinone, salicylic acid, or any other ingredients typically restricted during pregnancy.
Use with caution if you're prone to fungal acne. The serum contains Glycine Soja (Soybean) Sterols, which may potentially feed Malassezia yeast according to some ingredient databases. While many users with fungal acne use this without issues, patch testing is recommended. For a confirmed fungal-acne-safe alternative, consider Mad Hippie Vitamin C Serum or Melano CC.
Yes, but with timing considerations. This serum uses a stable SAP form of Vitamin C that works well at neutral pH, making it compatible with most actives. However, for best results: use Vitamin C in the morning and retinol at night. If using AHA/BHA, apply them at different times or on alternate days to avoid over-exfoliation. Wait 5-10 minutes between applying different actives.
This serum is excellent for oily, combination, and normal skin types due to its lightweight, water-based texture. It's also good for sensitive skin thanks to the gentle SAP formula. Dry skin types can use it but may need to layer a richer moisturizer on top. It's particularly well-suited for Vitamin C beginners and those seeking gentle brightening.
Most users notice improved hydration and a subtle glow within 1-2 weeks. The brand claims visible brightening in 14 days of consistent use. For significant fading of dark spots and hyperpigmentation, expect 4-8 weeks of daily use. Full results for skin texture improvement typically take 8-12 weeks. Consistency and daily sunscreen use are key.
Apply after cleansing and toning, before moisturizer. The order is: Cleanser โ Toner โ Hanasui Vitamin C Serum โ Moisturizer โ Sunscreen (AM). If using other serums, apply in order of thinnest to thickest consistency. This serum can be used both morning and night, but always use sunscreen during the day.
Hanasui Vitamin C Serum has a low comedogenic rating of 1/5. It's a water-based formula without heavy oils, silicones, or common pore-clogging ingredients. Most acne-prone users can use this without experiencing breakouts. However, individual reactions vary - if you're extremely acne-prone, patch test first on a small area for a week.
The serum has a PAO (Period After Opening) of 12 months. Since it uses stable Sodium Ascorbyl Phosphate instead of pure L-ascorbic acid, it's less prone to oxidation. Store in a cool, dry place away from sunlight. If the product changes color significantly (becomes dark orange/brown), it may have degraded and should be replaced.
Verdict: Hanasui Vitamin C Serum is an excellent entry-level brightening serum at an unbeatable price point. The gentle Sodium Ascorbyl Phosphate formula makes it perfect for Vitamin C beginners, sensitive skin, and pregnant/breastfeeding individuals. While the 2% concentration is lower than premium alternatives, the addition of Niacinamide provides synergistic brightening benefits. Best suited for those seeking gradual, gentle brightening rather than aggressive hyperpigmentation treatment. For the price, it's hard to find a better introduction to Vitamin C skincare.
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 ยซpromisesยป 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 |
|---|---|---|---|
| 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 |
Sodium Ascorbyl Phosphate
Antioxidant
|
Redness
Texture
Pores
|
|
| 0 |
Urea
Humectant, Skin Conditioning, Buffering
|
Hydrating
Texture
|
|
| 1 |
Betaine Salicylate
Antimicrobial Agent, Exfoliant, Keratolytic
|
|

