Skip to content

Pure Vitamin C24 Serum

Pure Vitamin C24 Serum

Product Description

Product overview

Made in Various INTERNATIONAL

A high-potency brightening serum with 24% pure L-Ascorbic Acid (246,750ppm), Triple Collagen, and CICA-7 Complex. Targets hyperpigmentation, fine lines, and uneven skin tone while soothing sensitive skin for a radiant, youthful complexion.

24% Pure Vitamin C Triple Collagen CICA-7 Complex Dermatologist Tested Fungal Acne Safe Fragrance-Free Cruelty-Free Eco-Friendly Glass
Pregnancy
Yes
Fungal Acne
Yes
Comedogenic
0/5
Size
30ml / 1.01 fl oz
Key Active
24% Vitamin C
Form
L-Ascorbic Acid
Packaging
Glass Dropper
Vegan
Yes
Real reviews · YouTube Shorts
Why it's different

24% High-Potency Brightening

Pure L-Ascorbic Acid at 246,750ppm concentration targets dark spots, melasma, and uneven skin tone for visible radiance in 2 weeks.

01

Texture & feel

SENSORY
Consistency
Oily-Serum
Scent
Subtle Vitamin C
Absorption
30-60 seconds
Finish
Dewy-Radiant

24% High-Potency Brightening

Pure L-Ascorbic Acid at 246,750ppm concentration targets dark spots, melasma, and uneven skin tone for visible radiance in 2 weeks.

Triple Collagen Complex

Hydrolyzed, Soluble, and Atelocollagen work together to boost skin elasticity, plump fine lines, and restore firmness.

CICA-7 Soothing Complex

Seven Centella Asiatica extracts calm irritation, reduce redness, and protect sensitive skin from environmental stressors.

Argireline Peptide (Botox-Alternative)

Acetyl Hexapeptide-8 relaxes expression lines and provides anti-wrinkle benefits without injections.

02

Safety & compatibility

SAFE
Pregnancy & Breastfeeding Safe

Vitamin C (L-Ascorbic Acid) is safe for topical use during pregnancy. Contains no retinoids, salicylic acid, or other pregnancy-unsafe ingredients.

Fungal Acne (Malassezia) Safe

Free from ferments, fatty acids, esters, and polysorbates that feed malassezia yeast. Verified safe by SkinSort.

Non-Comedogenic (0/5)

Oil-free, silicone-free formula with no pore-clogging ingredients. Safe for acne-prone skin.

Sensitive Skin Caution

24% concentration is potent. Start slowly (every 3-4 days) and patch test first. May cause slight tingling initially.

Sun Sensitivity

Always apply SPF 30+ when using during the day. Vitamin C increases photosensitivity.

Dermatologist Tested

Clinically tested for non-irritation. Suitable for sensitive skin when used as directed.

03

Ingredient breakdown

INGREDIENTS

Ascorbic Acid (Vitamin C) 24%Gold Standard

Pure L-Ascorbic Acid is the most researched and potent form of Vitamin C. At 24%, this is a high-strength concentration that delivers maximum brightening, antioxidant, and collagen-boosting benefits.

  • Brightening: Inhibits tyrosinase enzyme to reduce melanin production and fade dark spots
  • Collagen Synthesis: Essential co-factor for collagen production, improving skin firmness
  • Antioxidant: Neutralizes free radicals from UV and pollution damage
  • Studies: Efficacy maxes out at 20% concentration; higher percentages may increase irritation without added benefit
High concentration may cause mild tingling on sensitive skin. Start with 2-3x weekly application and build tolerance.

Alpha-Bisabolol 0.5%Proven

A chamomile-derived compound with powerful anti-inflammatory and skin-soothing properties. Helps counterbalance potential irritation from high-strength Vitamin C.

  • Anti-inflammatory: Reduces redness and calms irritated skin
  • Brightening: Works synergistically with Vitamin C to even skin tone
  • Wound healing: Promotes skin repair and regeneration

Triple Collagen Complex -Firming

A combination of Hydrolyzed Collagen, Soluble Collagen, and Atelocollagen provides multiple molecular weights for better penetration and hydration at different skin layers.

  • Hydrolyzed Collagen: Small peptides penetrate deeply to signal collagen production
  • Soluble Collagen: Forms a film on skin for moisture retention
  • Atelocollagen: Low-immunogenic collagen for sensitive skin compatibility

CICA-7 Complex (Centella Asiatica) -Soothing

Seven different Centella Asiatica extracts including root, leaf, and whole plant extracts, plus isolated actives: Asiatic Acid, Asiaticoside, Madecassic Acid, and Madecassoside.

  • Madecassoside: Inhibits UV-induced melanin synthesis and promotes collagen expression
  • Asiaticoside: Stimulates collagen I synthesis and wound healing
  • Combined effect: Anti-inflammatory, barrier repair, and anti-aging benefits
La Roche-Posay study: 5% Vitamin C + 0.1% Madecassoside showed significant improvement in wrinkles, firmness, and hydration over 6 months.

Acetyl Hexapeptide-8 (Argireline) -Anti-Wrinkle

Known as "Botox in a bottle," this peptide temporarily relaxes facial muscles to reduce the appearance of expression lines.

  • Mechanism: Inhibits neurotransmitter release to relax facial muscles
  • Studies: 10% solution reduced wrinkle depth by 17% in 15 days (in-vivo)
  • Note: Less dramatic than Botox but provides cumulative benefits with regular use

18 ingredients

Propanediol, Ascorbic Acid, Betaine, (-)-Alpha-Bisabolol, Water, Butylene Glycol, 1,2-Hexanediol, Centella Asiatica Root Extract, Centella Asiatica Extract, Centella Asiatica Leaf Extract, Soluble Collagen, Hydrolyzed Collagen, Atelocollagen, Asiatic Acid, Madecassoside, Madecassic Acid, Asiaticoside, Acetyl Hexapeptide-8

FREE FROM: Parabens, Fragrances, Silicones, Sulfates, Oils, Alcohol, Colorants, Allergens, PEGs, Mineral Oil, Essential Oils
04

Where it fits in your routine

ROUTINE
1
Cleanser
2
Toner
3
Vitamin C Serum
4
Essence/Serum
5
Moisturizer
6
Sunscreen (AM)

Apply to clean, dry skin before heavier serums and moisturizers. Best used in the evening; if using in AM, always follow with SPF 30+.

05

How to use

HOW TO USE
1

Cleanse & Prep

Start with clean, dry skin. Apply after toner/essence if using, or directly on bare skin after cleansing.

2

Dispense 2-3 Drops

Take 2-3 drops onto fingertips or palm. A little goes a long way with this concentrated formula.

3

Pat Gently

Gently pat and press into skin (don't rub). Focus on areas with dark spots or uneven tone. Avoid eye area.

4

Wait & Layer

Wait 30-60 seconds for absorption, then follow with moisturizer. Apply SPF 30+ if using during the day.

5

Build Tolerance

Start with every 3-4 days, gradually increasing to daily use as skin adapts to the high concentration.

06

Who is it for?

WHO

Perfect for you if:

  • You have dark spots, hyperpigmentation, or melasma
  • You want to brighten dull, tired-looking skin
  • You're addressing early signs of aging (fine lines, loss of firmness)
  • You want antioxidant protection from environmental damage
  • You've used Vitamin C before and want a higher concentration
  • You prefer fragrance-free, minimal ingredient formulas
  • You have fungal acne and need a safe brightening serum

Consider alternatives if:

  • You're new to Vitamin C (start with 10-15% first)
  • You have very sensitive or reactive skin
  • You prefer a stabilized Vitamin C derivative for longer shelf life
  • You dislike oily-textured serums
  • You want a serum with Vitamin E and Ferulic Acid for enhanced stability
  • You're looking for a budget option under $15
07

Skin type compatibility

SKIN TYPES
Oily Skin
Good

The oily-serum texture may feel slightly heavy. Use only 2 drops and follow with a lightweight moisturizer.

Dry Skin
Excellent

The propanediol base provides hydration. Triple Collagen adds moisture retention. Layer with a rich cream.

Combination
Excellent

Works well on combination skin. Use less on T-zone if concerned about oiliness.

Sensitive
Moderate

The CICA-7 Complex soothes, but 24% is potent. Patch test and start slowly. Consider a lower concentration if irritation persists.

Acne-Prone
Excellent

Non-comedogenic, fungal acne safe, oil-free. Helps fade post-acne marks and hyperpigmentation.

08

Results timeline

WEEK 8-12
Week 1

Initial Glow & Hydration

Skin appears more hydrated and has a subtle immediate glow from the serum's antioxidant protection. Some may experience mild tingling as skin adjusts.

85% noticed improved hydration
Week 2-3

Brighter, More Even Tone

Visible improvement in skin radiance and overall brightness. Dark spots begin to fade. Texture feels smoother and more refined.

78% reported brighter complexion
Week 4-6

Reduced Hyperpigmentation

Noticeable fading of dark spots, sun damage, and post-acne marks. Skin tone appears more uniform. Fine lines look less prominent.

72% saw faded dark spots
Week 8-12

Firmer, Youthful Skin

Collagen-boosting effects become visible. Skin feels firmer, more elastic. Continued improvement in overall skin health and resilience.

65% noticed improved firmness
09

Ratings by platform

950+ REVIEWS
Amazon
4.3
Rating
500+
Reviews
Main complaint: Small bottle size (30ml) for the price point
iHerb
★★★★½ 4.5
Rating
200+
Reviews
Main complaint: Thick, sticky texture compared to watery Vitamin C serums
YesStyle
★★★★½ 4.6
Rating
150+
Reviews
Main complaint: Quick oxidation if not stored properly
Ulta Beauty
4.4
Rating
100+
Reviews
Main complaint: Initial tingling sensation for sensitive skin users
10

Pros & cons

BALANCED

Praised

  • High 24% concentration delivers visible results quickly
  • Noticeable brightening and dark spot fading within weeks
  • CICA-7 Complex makes it gentler than expected for sensitive skin
  • Clean formula: fragrance-free, paraben-free, silicone-free
  • Fungal acne and pregnancy safe
  • Eco-friendly glass packaging with recyclable label
  • Doesn't oxidize as quickly as some competitors
  • Triple collagen adds firming and hydrating benefits

Criticized

  • Oily, thick texture not suitable for everyone
  • Small 30ml bottle depletes quickly at $20+ price point
  • Must use within 2 months of opening
  • No Vitamin E or Ferulic Acid for enhanced stability
  • 24% may be too strong for Vitamin C beginners
  • Dropper packaging exposes product to air and light
  • Slight Vitamin C scent (metallic/hot dog)
11

Budget-friendly alternatives (dupes)

DUPES
85% Match
The Vitamin C 23 Serum
$17.00
K-Beauty

Similar high concentration (23% vs 24%). Uses Vitamin E and Super Vitamin E for stability. More watery texture. May oxidize faster.

80% Match
20% Vitamin C + E Ferulic Acid Serum
$26.00
Western

Classic L-AA formula with Vitamin E and Ferulic Acid for stability. Watery texture. Lower concentration (20%) but enhanced stability. Proven SkinCeuticals dupe.

70% Match
Alpha Arbutin 2% + HA
$10.80
Budget Pick

Much lower concentration (8%) in anhydrous propanediol base. More stable formula. Better for beginners. Adds Alpha Arbutin for extra brightening.

65% Match
Freshly Juiced Vitamin Drop
$23.00
K-Beauty

Only 5% Vitamin C with higher pH (6) - much gentler but less potent. Great for sensitive skin beginners. Not as effective for stubborn pigmentation.

12

Comparison with competitors

SIDE-BY-SIDE

SkinCeuticals C E Ferulic

Vitamin C Concentration 15% L-Ascorbic Acid
Stabilizers Vitamin E + Ferulic Acid
Additional Actives None
Size 30ml
Texture Watery
Shelf Life After Opening 3-6 months
20% Vitamin C + E Ferulic Acid Serum
Vitamin C Concentration 20% L-Ascorbic Acid
Stabilizers Vitamin E + Ferulic Acid
Additional Actives Hyaluronic Acid
Size 30ml
Texture Watery
Shelf Life After Opening 3 months (refrigerated)
The Vitamin C 23 Serum
Vitamin C Concentration 23% L-Ascorbic Acid
Stabilizers Vitamin E
Additional Actives Hyaluronic Acid
Size 20ml
Texture Watery
Shelf Life After Opening Use quickly
13

Storage & shelf life

2 MONTHS
Period After Opening (PAO)

2 months after opening. L-Ascorbic Acid oxidizes quickly once exposed to air. Use promptly for best results.

Storage

Store in a cool, dark place away from direct sunlight. Refrigeration recommended to extend potency. Product may darken (yellow/orange) when oxidized.

Packaging

Eco-friendly dark glass dropper bottle with removable label for recycling. Dropper exposes product to air with each use.

Travel Friendly

Yes, 30ml is under 100ml/3.4oz TSA limit. Keep sealed and cool during travel to prevent oxidation.

13

Frequently asked questions

FAQ

Yes! Topical Vitamin C (L-Ascorbic Acid) is considered safe during pregnancy and breastfeeding. This serum contains no retinoids, salicylic acid, hydroquinone, or other pregnancy-unsafe ingredients. However, always consult your healthcare provider before adding new products during pregnancy.

Yes! This serum is verified fungal acne safe by SkinSort. It's free from ferments, fatty acids, esters, polysorbates, and oils that can feed malassezia yeast. The clean, minimal formula makes it an excellent brightening option for those prone to fungal acne.

Use caution when combining with other actives. You can use Vitamin C in the morning and retinol at night. Avoid using with AHAs/BHAs in the same routine as the combination may cause irritation. Allow 15-20 minutes between application of different actives, or alternate days for sensitive skin.

Best suited for dry, combination, and acne-prone skin types. The oily-serum texture provides hydration while brightening. Sensitive skin users should proceed with caution due to the 24% concentration - start with application every 3-4 days. Those with very oily skin may prefer a watery-textured Vitamin C.

Most users notice improved radiance and hydration within the first week. Visible brightening and fading of dark spots typically appears at 2-3 weeks. Significant improvement in hyperpigmentation, fine lines, and overall skin tone develops over 4-8 weeks of consistent use. Full collagen-building benefits emerge at 8-12 weeks.

Apply after cleansing and toning, before heavier serums and moisturizers. The rule is thinnest to thickest consistency. Wait 30-60 seconds for absorption before the next step. If using in the morning, always follow with SPF 30+. For evening use, apply before your night cream or sleeping mask.

No, this serum has a comedogenic rating of 0/5. It's free from pore-clogging oils, silicones, and heavy emollients. The propanediol base and minimal ingredient list make it safe for acne-prone and congestion-prone skin. It won't contribute to blackheads, whiteheads, or breakouts.

Use within 2 months of opening for optimal efficacy. L-Ascorbic Acid is unstable and oxidizes when exposed to air and light. Signs of oxidation include color change from clear to yellow/orange and a stronger metallic scent. Store in a cool, dark place or refrigerate to extend potency. Discard if the serum turns dark orange or brown.

— Skincarisma verdict
4.3 / 5 ★★★★☆

Verdict: TIRTIR Pure Vitamin C24 Serum is a potent, well-formulated K-beauty option for those seeking aggressive brightening and anti-aging benefits. The 24% L-Ascorbic Acid concentration combined with Triple Collagen, CICA-7 Complex, and Argireline peptide delivers impressive results for hyperpigmentation, dullness, and early signs of aging. The clean, fragrance-free formula is fungal acne and pregnancy safe - a rarity at this concentration. However, the lack of stabilizing Vitamin E and Ferulic Acid means shorter shelf life, and the oily texture isn't for everyone. Best for experienced Vitamin C users with dry to combination skin who want maximum potency without breaking the bank compared to luxury options like SkinCeuticals.

Product Overview

question
lightbulb What are Quick Product Notes?

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.

muscle Pro Tip Alert!

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.

Awesome, I Understand!

Quick Product Notes

Click on icons for more information
question
lightbulb What are Notable Effects & Ingredients?

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.

muscle Pro Tip Alert!

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

Awesome, I Understand!

Notable Effects & Ingredients

anti-aging Anti-Aging from 9 ingredient(s):
Ascorbic Acid Centella Asiatica Extract Centella Asiatica Leaf Extract Soluble Collagen Hydrolyzed Collagen Atelocollagen Madecassoside Madecassic Acid Acetyl Hexapeptide-8
brightening Brightening from 1 ingredient(s):
Ascorbic Acid
wound Promotes Wound Healing from 5 ingredient(s):
Ascorbic Acid Centella Asiatica Extract Centella Asiatica Leaf Extract Madecassoside Asiaticoside
question
lightbulb What are Ingredients Related to Skin Type?

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.

muscle Pro Tip Alert!

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!

Awesome, I Understand!

Ingredients Related to Skin Types

Click on icons for more information
dry-skin Dry Skin
2
oily-skin Oily/Acne-Prone Skin
sensitive-skin Sensitive Skin
question
lightbulb What is the Ingredient Safety Breakdown?

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.

muscle Pro Tip Alert!

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.

Awesome, I Understand!

Ingredient Safety Breakdown

EWG Health Ratings
Low risk
Medium risk
High risk
Unknown risk
77% 22%

Product ingredient list

Showing first 5 of 18 ingredients
EWG CIR Ingredient Name & Cosmetic Functions Notes
1 Unknown
Propanediol
Solvent, Viscosity Controlling, Viscosity Decreasing Agent
1 A
Ascorbic Acid
Skin Conditioning, Masking, Fragrance, Antioxidant, Ph Adjuster, Buffering Agent, Buffering
brightening Brightening
anti-aging Anti-Aging
Promotes Wound Healing
Redness
Dark Spots
Texture
Pores
1 B
Betaine
Skin Conditioning, Humectant, Viscosity Controlling, Antistatic Agent, Hair Conditioning
Hydrating
Irritation
Dark Spots
0 Unknown
Bisabolol
Masking, Skin Conditioning, Soothing
Redness
Irritation
Dark Spots
1 Unknown
Water
Solvent, Skin Conditioning
VIEW ALL INGREDIENTS