MINI

An orange bottle of STSAJ Radiant Super C serum with a white pump dispenser, centered on a light gray background with a soft shadow.

Model applying ST.SAJ Radiant Super C serum to face

Close-up of serum texture, key ingredients labelled: Vitamin C, Salicylic Acid, Illumiscin™-Glow, Squalane, Glycerin.

ST.SAJ founder Emmylou quote about Radiant Super C Vitamin C serum

ST.SAJ Radiant Super C benefits - refine texture, deep hydration, reduce redness, even skin tone

IMAGE5ST.SAJ Radiant Super C how to use steps - massage and layer with serums

RADIANT SUPER C MINI 15ml

Name: RADIANT SUPER C MINI 15ml
Brand: ST.SAJ
Price: 24.95 AUD
Availability: InStock

$24.95 Save Liquid error (snippets/product line 619): Computation results in '-Infinity'%

4.9

Rated 4.9 out of 5 stars

Hydrating

Brightening

Smoothing

Revitalising

Free AU Shipping On Orders Over $150

Stabilised, oil-soluble Vitamin C penetrates deeper without irritation
Illumiscin™-Glow targets uneven tone, calms redness and boosts luminosity
Salicylic acid gently exfoliates to refine texture and smooth skin
Glycerin and squalene lock in moisture for a dewy, hydrated finish
Designed for all skin tones - brightens without altering natural pigment
Use AM and PM - always follow with SPF during the day

A high-performance brightening serum formulated for all skin tones. Stabilised, oil-soluble Vitamin C works beneath the surface to target dark spots, dullness and uneven tone without irritation. Illumiscin™-Glow boosts luminosity and calms redness. Salicylic acid refines texture for a smoother, clearer complexion. Glycerin locks in moisture and supports the skin barrier. Squalene adds a natural dewy finish.

Apply after cleansing and essence, AM and PM. Layer over PEPTIDE POWER ESSENCE and seal with SUPREME SKIN 7. Always use SPF during the day.

15ml / 0.51 fl oz

Massage 2–3 drops into face, neck and décolletage after cleansing and essence.
Seal with SUPREME SKIN 7. Always use SPF during the day.

Aqua, Pentylene Glycol, Glycerin, Ascorbyl Tetraisopalmitate, C13-15 Alkane, Ethoxydiglycol, Olive Oil Decyl Esters, Coco-Caprylate/Caprate, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Squalene, Hordeum Vulgare Extract, Salicylic Acid, Tocopherol, Xanthan Gum, Sodium Hydroxide, Dehydroacetic Acid, Benzyl Alcohol, Citric Acid.

No artificial colours, parabens, silicones, phthalates, chemical UV filters.

Complete the Routine

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ST.SAJ Glow Kit - Glow Cleanse, Clear Cleanse, Peptide Power Essence, Radiant Super C and Supreme Skin 7 product flat lay

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4.9

Rated 4.9 out of 5 stars

Based on 9 reviews

100%would recommend this product

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9 reviews

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SM
Sarah M.
Verified Buyer
I recommend this product
Rated 5 out of 5 stars
10 hours ago
Love
Love the radiant C serum so glowy
Was this helpful?
SC
Sarah C.
Verified Buyer
I recommend this product
Rated 5 out of 5 stars
4 days ago
Mini Super C
I purchased the Mini Super C alongside the Mini Supreme Skin Kit.
I have very sensitive skin, dermatitis & rosacea, I’m also going through menopause.
I have seen a vast improvement in my skin from using all of the products, the Super C has given my skin a much needed glow. I will be purchasing Supreme Skin Kit in full size & also the Super C full size.
Thanks for creating these wonderful products, I’m so very happy 😊
Was this helpful?
RM
Ren M.
Verified Buyer
I recommend this product
Rated 5 out of 5 stars
1 week ago
Radiant....
For someone always reacting to face creams, this has been fantastic
Was this helpful?
JR
joanna r.
Verified Buyer
I recommend this product
Rated 4 out of 5 stars
1 week ago
So far So bright!
My interim take on the Super C is Super positive! Plays nicely with other product and seems to be suiting my skin - more of that to come as I progress. Like the consistency in particular. I have ditched a couple of other things while integrating and feeling good about it.
Was this helpful?
BR
Brenda R.
Verified Buyer
I recommend this product
Rated 5 out of 5 stars
2 weeks ago
Mini
Finally. My travel set is complete. The full St Saj routine available in minis so my skin care is to take away also 🙌
Was this helpful?

Australian Made

VEGAN & CRUELTY FREE

We recommend using Radiant Super C in the morning, though it can be used at a time that suits your routine. So if you want to use it in the evening, go for it!

Vitamin C is particularly beneficial during the day as it helps brighten the complexion and provides antioxidant support against environmental stressors.

For optimal layering:

Cleanse → Peptide Power Essence → Hyaluronic Smoothing Complex → Radiant Super C → Supreme Skin 7 → SPF

Always finish with SPF in the morning to protect your skin and preserve your results.
Yes, Radiant Super C is housed in a precision dropper bottle for controlled, hygienic application.

The formula uses a stabilised, oil-soluble form of Vitamin C, which is significantly more resistant to oxidation than traditional water-based L-ascorbic acid formulas. This allows it to maintain stability while being dispensed via dropper.

The dropper format also allows you to customise the amount used, ensuring minimal waste and precise layering within your routine.
“2% Stabilised Vitamin C” refers to both the concentration and the formulation stability of the Vitamin C used in Radiant Super C.

The formula contains 2% of a stable, oil-soluble form of Vitamin C (Ascorbyl Tetraisopalmitate). Unlike traditional Vitamin C (L-ascorbic acid), which can oxidise quickly and lose potency, this stabilised form is designed to remain effective for longer while being gentler on the skin.

This means:

The ingredient maintains its strength and performance over time

It is less prone to rapid oxidation

It supports visible brightness and collagen production

It delivers results without the high irritation often associated with acidic Vitamin C formulas

Rather than relying on high percentages for marketing appeal, Radiant Super C prioritises stability, compatibility, and consistent performance for long-term skin health.
Illumiscin™-Glow is described as a world-first innovation because it was developed as a next-generation brightening complex designed to deliver visible radiance while respecting the skin barrier.

Unlike traditional brightening systems that rely heavily on aggressive exfoliation or high-acid concentrations, Illumiscin™-Glow works through a multi-pathway approach, supporting clarity, tone balance, and luminosity without triggering unnecessary irritation.

What makes it special is its ability to:

Enhance visible glow across all skin tones

Support a more even-looking complexion

Work synergistically with stabilised Vitamin C to amplify brightness

Deliver results without compromising barrier integrity

It allows Radiant Super C to achieve refined, balanced luminosity, not just surface-level brightness.
Illumiscin™-Glow is a next-generation brightening complex developed to deliver visible radiance while respecting the skin barrier.

Unlike traditional brightening systems that rely heavily on aggressive exfoliation or high-acid concentrations, Illumiscin™-Glow works through a multi-pathway approach, supporting clarity, tone balance, and luminosity without triggering unnecessary irritation.

What makes it special is its ability to:

Enhance visible glow across all skin tones

Support a more even-looking complexion

Work synergistically with stabilised Vitamin C to amplify brightness

Deliver results without compromising barrier integrity

It allows Radiant Super C to achieve refined, balanced luminosity, not just surface-level brightness.
Radiant Super C is designed to visibly brighten, refine, and support overall skin clarity. It helps to:

Improve the appearance of uneven skin tone

Enhance radiance and luminosity

Support collagen for firmer-looking, more resilient skin

Refine the look of pores

Promote smoother, more even texture

Provide antioxidant protection against daily environmental stressors

With consistent use, skin appears brighter, clearer, and more luminous while maintaining barrier balance.

Yes. All ST.SAJ products are 100% vegan and cruelty-free. We use plant-based ingredients throughout our formulations. We're not tested on animals and don't sell in markets that require animal testing.
If you follow a vegan lifestyle, you can use our entire range with confidence.
Our salicylic acid products are formulated to exfoliate gently while supporting your skin barrier, not strip it.
Here's the difference: Most salicylic acid treatments are acid-heavy formulas designed for aggressive exfoliation. ST.SAJ products prioritise hydration and barrier health alongside exfoliation. Your skin stays nourished, not compromised.

High levels of glycerin and humectants to draw moisture into the skin
Soothing botanicals (like barley extract and madecassoside) to calm
Our salicylic acid concentration is enough to exfoliate, not enough to irritate

Who can use these?

Normal to oily skin: Daily use
Sensitive or dry skin: Start 2-3 times per week, gradually increase as skin adjusts
Very reactive skin: Alternate nights with a gentle moisturiser, or use only 2x weekly

If you experience irritation:
Stop using and let your skin recover. When you resume, use it less frequently. If irritation persists, discontinue.
The goal is healthy, glowing skin, not red, stripped skin. If a product is making you uncomfortable, it's not the right fit.
We proudly offer Free Shipping on all Australian orders over $150.
Shipping on Australian orders under $150 is a flat rate of $10.00. We also offer express shipping for those that need their skincare in a hurry!
Yes, we do. See our shipping rates at checkout if you are one of our amazing friends abroad.
Please check our Returns Policy for information on returns.
If you believe you’ve had an allergic reaction to a ST.SAJ product, please email glow@stsaj.com straight away. Stop using the product for now, but don’t throw it away. If you’ve used less than 20% off the product we can discuss a refund after our team assesses the images of your reaction.
Selected Ultra Beauty stores. Use our store locator and pop in your postcode to find your nearest store.

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