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Glow-boosting Cell-protecting Revitalizing
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Step 2: Serum

Vitamin C Serum

Sale price$49.90 USDOut of stock

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Wake up dull skin with a fresh, radiant glow.

Supports skin energy for a smoother, more even look.

Daily brightness without irritation.

Loved by our customers

Trusted by our community as a daily glow essential.

Who is this product ideal for?

Perfect for anyone looking to brighten dull skin and improve uneven tone.

Description

Vitamin C Serum

For brighter, smoother, more even-looking skin

Radiance isn’t just about surface glow - it’s about how energized your skin cells are. Our Vitamin C Serum goes beyond traditional brightening by combining two highly stable forms of Vitamin C with 5-Aminolevulinic Acid (5-ALA) to support skin clarity, smoothness, and visible vitality.

This lightweight, fast-absorbing serum helps revive dull skin, refine texture, and promote a more even, luminous complexion.

Perfect for skin that:

  • Looks dull or tired

  • Has uneven tone or dark spots

  • Shows early signs of aging

  • Needs more glow and clarity

Dual Vitamin C + 5-ALA: A new approach to glow

Unlike many Vitamin C serums that focus only on surface effects, this formula is designed to support both radiance and skin energy.

What makes it different:

  • Two stable forms of Vitamin C
    Deliver brightening and antioxidant benefits while helping improve the appearance of uneven tone and skin texture, without the instability often associated with pure Vitamin C.

  • 5-Aminolevulinic Acid (5-ALA)
    Supports cell's natural energy processes, helping skin look more resilient, refreshed, and balanced over time.

  • Niacinamide
    Helps refine the appearance of pores, support the skin barrier, and enhance overall evenness.

  • Antioxidant protection
    Helps defend skin against environmental stressors that can contribute to dullness and premature aging.

Why skin energy matters

Healthy-looking skin depends on energy. By pairing Vitamin C with 5-ALA, this serum supports the biological processes that allow skin to renew, recover, and maintain its natural glow — not just temporarily, but consistently.

Results you’ll notice

With regular use, skin appears:

  • Brighter and more even

  • Smoother and more refined

  • Fresher, energized, and naturally radiant

Why you’ll love it

  • Lightweight, fast-absorbing texture

  • Gentle enough for daily use

  • Designed to layer seamlessly into any routine

  • Supports glow & skin energy

A next-generation Vitamin C serum for brighter, energized, resilient-looking skin.

Application

Apply the Vitamin C Serum daily as needed, both in the morning and in the evening. After cleansing, apply 2-3 drops evenly to your face, and gently massage it in with your fingertips, starting from the center of your face and moving outward. Allow the serum to fully absorb. Follow with your moisturizer. For daytime use, we recommend applying a sunscreen with SPF 30+ afterward.

Ingredients

Water, Sodium Ascorbyl Phosphate, Pentylene Glycol, Ascorbyl Glucoside, Xanthan Gum, Fructooligosaccharides, Sodium Lactate, Glycerin, Oryzanol, Beta Vulgaris (Beet) Root Extract, Acacia Senegal Gum, Sodium Stearoyl Lactylate, 1,2-Heptanediol, 3-Glyceryl Ascorbate, Sodium Hyaluronate, Lactic Acid, Algin, Tapioca Starch, Aminolevulinic Acid Phosphate, Potassium Lactate, Allantoin, Diammonium Ferric Pentetate, Olea Europaea (Olive) Leaf Extract, Zinc PCA, Ascorbic Acid

Füllmenge: 1 fl.oz. / 30ml

Packaged in Italian Glass

No Parabens or Silicones

Cruelty-free

No Perfume

GMO-free

No Microplastics

Where Science Meets Results

How 5-ALA supports your skin’s natural functions

1. Activate Cellular Energy
5-ALA supports your skin’s natural energy production — forming the foundation for a healthy, radiant complexion.

2. Boost Regeneration
With increased cellular energy, the skin can better support its natural renewal and repair processes.

3. Strengthen Skin Structure
5-ALA helps promote the formation of collagen and elastin — for improved firmness and smoother-looking skin.

4. Maintain Hydration
A healthy cellular metabolism reinforces the skin barrier, helping it retain moisture and stay protected from dryness.

The Results Our Community Loves

Refined Skin Texture

Uneven texture or enlarged pores?

This is often linked to a slowed cellular renewal process.

5-ALA supports the natural renewal cycle and helps rebalance overall skin texture - for visibly refined pores, smoother contours, and a more even-looking complexion.

Deep Hydration

Dry, tight skin even though you’re using rich moisturizers?

Moisture alone isn’t always enough - your skin needs support to hold on to it. Clinical studies show that 5-ALA sustainably improves the skin’s moisture levels.

The result: skin that looks plump, fresh, and deeply hydrated.

Skin in Balance

Does your skin tend to flush easily or look stressed?

A slowed-down renewal process is often the reason.

Our active ingredient 5-ALA supports natural regeneration and reinforces the skin’s protective functions. As a result, redness fades, irritation calms, and your complexion looks noticeably more even.

Natural Glow Booster

Dull, tired-looking skin - even with a dedicated routine?

In many cases, the skin is simply lacking energy. Our active ingredient 5-ALA supports mitochondrial processes essential for cellular energy production - helping your skin regain its radiance quickly and naturally.

Preventive Skincare

Looking for skincare that works early and supports your skin in the long run?

We believe in preventive skincare powered by 5-ALA.

5-ALA supports cellular activity and keeps your skin’s natural renewal processes moving - for smoother, clearer-looking skin today and the confidence of knowing your complexion will stay radiant tomorrow.

Ingredients

These Ingredients Make the Difference

Sodium Ascorbyl Phosphate

A gentle, stable form of vitamin C suitable for sensitive skin. Brightens dull skin, supports an even complexion, and shields against environmental damage.

Ideal for: radiance, even tone, protection

Allantoin

A calming ingredient traditionally extracted from comfrey root. Supports natural regeneration, reduces irritation, and leaves the skin smooth and cared for.

Ideal for: soothing, regeneration

Zinc PCA

A combination of zinc and the skin-identical amino acid PCA. Helps regulate oil production, inhibits blemish-causing bacteria, and promotes a clearer complexion.

Ideal for: blemish control, skin balance

Step 1 -
Apply

Morning and evening, apply 2–3 drops onto clean skin.

Step 2 -
Work In

Gently smooth it in with your fingertips, moving from the center of the face outward.

Step 3 -
Let It Absorb

Allow it to sink in completely before applying your moisturizer.

Note: During the day, pair with SPF 30+.

FAQs

More questions? We're here to help!

Contact Us

What is 5-ALA in skincare?

5-ALA (5-Aminolevulinic Acid) is a naturally occurring amino acid that supports cellular energy production.

Found in small amounts in foods like spinach and tomatoes, 5-ALA helps energize skin cells, making it a powerful ingredient for improving hydration, firmness, and glow.

How does 5-ALA work on the skin?

5-ALA stimulates the mitochondria, known as the "powerhouses" of cells.

This boosts the production of ATP (cellular energy), which helps the skin to generate collagen and elastin, retain moisture, and regenerate more effectively - resulting in smoother, more radiant skin.

Is 5-ALA safe for daily use?

All our 5-ALA skincare products are dermatologically tested and suitable for daily use as part of your skincare routine.

When can I expect to see visible results with 5-ALA skincare?

In a clinical study, participants saw a measurable increase in skin hydration after just 4 weeks, along with a visible reduction in wrinkle depth and fine lines. Results may vary depending on skin type and consistency of use.

Is 5-ALA a natural skincare ingredient?

Yes. 5-ALA occurs naturally in the human body and in small amounts in foods like spinach, tomatoes, and potatoes.

In skincare, it is biotechnologically derived for purity, safety, and effectiveness.

Can I combine 5-ALA with other skincare ingredients?

Absolutely. 5-ALA pairs well with hydrating agents like hyaluronic acid, barrier-supporting ingredients like ceramides, and even brightening actives like Vitamin C. It’s a versatile and gentle base for many routines.

Is there scientific research supporting the effectiveness of 5-ALA in skincare?

Yes. A Japanese double-blind clinical study confirmed that 5-ALA significantly increased skin moisture and reduced the depth of wrinkles after just four weeks of regular use.

Source: Naraoka et al., Health Journal, 2020.

Is 5-ALA vegan and cruelty-free?

Yes. The 5-ALA used in KIYOMI SKIN products is vegan, biotechnologically produced, and our skincare is never tested on animals.

What are the skincare benefits of 5-ALA?

5-ALA is ideal for anyone looking to:

  • Deep hydration and moisture retention
  • Visible reduction in fine lines and wrinkles
  • Improved skin elasticity and firmness
  • Supports cell renewal and repair
  • Long-term radiance and skin resilience

Is 5-ALA safe for all skin types?

Yes. 5-ALA is dermatologically tested and considered safe for all skin types, including sensitive skin.

At KIYOMI SKIN, we formulate with clean, biocompatible ingredients to ensure high tolerance and daily use.

Who should use 5-ALA skincare products?

5-ALA is perfect for those looking to:

  • Improve skin hydration and glow
  • Prevent or reduce signs of aging
  • Boost collagen production naturally
  • Strengthen and support skin from the inside out
  • Build a science-based, minimalist skincare routine.
Your Feedback

Kiyomi Community

@maribel_k_a

Skin Glow = locked in ✨

@antoninakuss

Just found a new favorite for my skincare routine 🌸

@belky_ferrey

It’s my first time trying something with 5-ALA and now I get why it’s a big deal in Japan.

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