Simply Brilliant 24/7 Brightening Serum

$74.00

Now with 18 key ingredients. Our new and improved brightening serum combines three targeted pathways — brighten, exfoliate, and support — for a more comprehensive approach to helping improve the look of dark spots and uneven skin tone.
1 fl oz. / 30 mL

Build Your Routine
  • Helps visibly reduce the appearance of dark spots and discoloration
  • Helps improve the look of uneven skin tone
  • Gently exfoliates for smoother, brighter-looking skin
  • Helps protect from the visible effects of environmental stress
  • New & improved formula with 18 key ingredients (up from 10)
  • Suitable for AM and PM daily use

Simply Brilliant 24/7 Brightening Serum is a new and improved high-potency brightening serum featuring 18 key ingredients organized into three targeted pathways to help improve the look of dark spots, uneven skin tone, and visible discoloration. Unlike single-ingredient brightening serums, Simply Brilliant works through a comprehensive Triple-Action Brightening System designed to address the visible signs of discoloration from multiple angles.
 
What's new: We nearly doubled the active ingredient count from 10 to 18, adding clinically trending brightening actives including Tranexamic Acid and Kojic Acid, a full AHA + PHA exfoliating complex, and an expanded botanical brightening blend. Everything you loved about the original — the lightweight texture, the AM/PM versatility, the core actives — is still here. It's the same serum, upgraded.
 
The Brightening Complex features Tranexamic Acid, Kojic Acid, Niacinamide, Phenylethyl Resorcinol, and a White Flower Botanical Blend including Daisy, Waltheria, Papaya, Guava, and Saxifraga. Together, these advanced brightening ingredients help visibly reduce the appearance of dark spots and uneven tone for a more luminous-looking complexion.
 
The Exfoliating Complex now includes Mandelic Acid and Tartaric Acid alongside the original Lactic Acid, plus Gluconolactone (a PHA) for enhanced surface renewal. This balanced blend gently exfoliates to help improve the appearance of texture, clarity, and radiance — without the harshness of aggressive exfoliation.
 
The Antioxidant Defense Complex delivers Ethyl Ascorbic Acid (a stable Vitamin C derivative), Ferulic Acid, and Green Tea to help protect skin's appearance from the visible effects of environmental stressors while supporting a brighter, healthier-looking complexion.
 
Simply Brilliant has a lightweight texture that absorbs quickly and layers well with other products. It's designed for daily use, morning and night, and can be worked into both at-home skincare routines and professional treatment plans. In clinical and spa settings, aestheticians often recommend it to help maintain results between advanced brightening treatments.
 
Formulated without hydroquinone or arbutin. A comprehensive approach to helping improve the look of hyperpigmentation and visible discoloration, with a focus on consistency, tolerance, and visible improvement over time.

AM — Apply 1–2 pumps of this daily brightening serum to freshly cleansed skin. Follow with moisturizer and broad-spectrum sunscreen. Required: wear SPF daily when using this product, as it contains AHAs that may increase sun sensitivity.
 
PM — Apply 1–2 pumps to freshly cleansed skin. Follow with moisturizer.

1. What's new about the Simply Brilliant formula?

A. The new and improved formula nearly doubles the active ingredient count from 10 to 18. We added Tranexamic Acid, Kojic Acid, Mandelic Acid, Tartaric Acid, and an expanded White Flower Botanical Blend. Plus, we organized everything into a Triple-Action Brightening System with three distinct pathways — Brighten, Exfoliate, and Support — for a more comprehensive approach to visible discoloration.

2. I loved the original. Why should I switch to the new formula?

A. Everything you loved is still there — same lightweight texture, same AM/PM versatility, same core actives like Niacinamide and Vitamin C. What's new: 8 additional targeted ingredients (including trending actives like Tranexamic Acid and Kojic Acid), a full exfoliating complex instead of just Lactic Acid alone, and a structured three-pathway system that works more comprehensively. Same serum, significantly upgraded.

3. What does this brightening serum do?

A. Simply Brilliant helps improve the look of dark spots, uneven skin tone, and visible discoloration. It works through three targeted pathways: brightening actives to help reduce the appearance of dark spots, gentle AHAs and a PHA to exfoliate and reveal smoother-looking skin, and antioxidants to help protect from environmental stress.

4. Who is this serum best for?

A. Anyone concerned with dark spots, uneven skin tone, post-breakout marks, dullness, or loss of radiance. It's also excellent for maintaining results after professional brightening treatments. Suitable for all skin types and gentle enough for twice-daily use.

5. How is this different from a Vitamin C serum?

A. Most brightening serums rely on one hero ingredient like Vitamin C alone. Simply Brilliant combines 18 key ingredients across three targeted pathways — including a stable Vitamin C derivative plus Tranexamic Acid, Kojic Acid, AHAs, and botanicals — providing a more comprehensive approach to visible discoloration than any single ingredient can.

6. Will it irritate my skin?

A. The formula is designed for daily AM and PM use. The exfoliating blend uses gentler acids like Mandelic Acid and Gluconolactone (a PHA) that are well-tolerated even on sensitized skin. No build-up period needed — start full-strength from day one.

7. Do I need to wear sunscreen with this?

A. Yes. The formula contains alpha hydroxy acids that may increase sun sensitivity. A broad-spectrum SPF is required every morning while using this product and for one week after discontinuing. We recommend pairing with Peptide Rich Defense.

8. Can I use this brightening serum every day?

A. Yes. Simply Brilliant is designed for twice-daily use, morning and evening. Apply 1–2 pumps to clean skin, then follow with moisturizer and SPF in the morning. The formula is calibrated for daily tolerance from day one.

9. Does it contain hydroquinone?

A. No. Simply Brilliant is formulated without hydroquinone or arbutin. It uses a blend of advanced brightening actives and botanicals to help fade the look of dark spots without harsh or controversial ingredients.

10. When will I see results?

A. With consistent twice-daily use, most users notice improved clarity and brighter-looking skin within 4–6 weeks. Visible improvement in the look of dark spots and uneven tone typically follows with continued use. Clinical results pending final testing.

11. Is this a professional skincare product?

A. Yes. COSMEDIX products are developed for clinical and spa environments. Aestheticians recommend Simply Brilliant as part of home care regimens and to maintain results between professional brightening treatments like peels and facials.

AM/PM Use
Serum
All skin types

THE COSMEDIX DIFFERENCE

Powerful Results, Visible Transformation.

Simply Brilliant 24/7 Brightening Serum
Simply Brilliant 24/7 Brightening Serum

83% saw more radiant skin immediately after application*

20% improvement in skin radiance after 8 weeks*

16% improvement in the appearance of uneven skin tone after 8 weeks*

*Results based on an 8-week 3rd party clinical study.

Benefits & Usage

Transformative Ingredients

Clean. Clinical. Luxurious

Clinically Proven Efficacy

  • Help visibly reduce the appearance of dark spots and promote a more even-looking complexion

  • Gently exfoliates for smoother, brighter-looking texture and improved clarity

  • Antioxidants that help protect from the visible effects of environmental stress

Simply Brilliant 24/7 Brightening Serum

NEW & IMPROVED: FROM 10 TO 18 KEY INGREDIENTS

Our bestselling brightening serum, redesigned. We added Tranexamic Acid, Kojic Acid, an expanded AHA + PHA exfoliating complex, and a White Flower Botanical Blend — then organized all 18 ingredients into three targeted pathways. Same texture. Same routine. More comprehensive results for the look of dark spots and uneven skin tone.

Simply Brilliant 24/7 Brightening Serum

THE TRIPLE-ACTION BRIGHTENING SYSTEM

One ingredient targets one pathway. Simply Brilliant works through three. Brighten: helps reduce the look of dark spots. Exfoliate: gently renews for smoother-looking skin. Support: helps protect from environmental stress. Three pathways, working together daily for a more radiant-looking complexion.

  • 5 stars: 48 (91%)
  • 4 stars: 2 (4%)
  • 3 stars: 1 (2%)
  • 2 stars: 1 (2%)
  • 1 star: 1 (2%)
This product has no reviews of its own. The merchant grouped it with related products, so the reviews shown are from across that group.
A
Anonymous
Professional treatments: Occasionally
Age: Above 60 years old
Gender: Female
Recommends this product: Yes
Revived skin

Revived skin. Brighter, smoother.

K
KENSIE C.
Quality:
Needs improvement
Excellent quality
Value:
Not a good value
Excellent value
Professional treatments: Occasionally
Age: 25 to 39 years old
Gender: Female
Recommends this product: Yes
I love the way it feels and how it applies! Excited to keep using it and see the brightening results

I love the way it feels and how it applies! Excited to keep using it and see the brightening results.

T
Tina
Professional treatments: Yes
Age: 40 to 60 years old
Gender: Female
Recommends this product: Yes
I’m an aesthetician and have been using this product for over 13 years

I’m an aesthetician and have been using this product for over 13 years. It’s must in my regimen! LOVE the results it produces!!

O
Oluwaremi L.
Professional treatments: Yes
Age: 25 to 39 years old
Gender: Female
Recommends this product: Yes
the best of them all

the best of them all. great serum especially when mixed with the vitamin C crystals

A
Anonymous
Quality:
Needs improvement
Excellent quality
Value:
Not a good value
Excellent value
Professional treatments: Occasionally
Age: 25 to 39 years old
Gender: Female
Recommends this product: Yes
My favorite serum especially since I struggle with hyperpigmentation

My favorite serum especially since I struggle with hyperpigmentation.

R
Renee

I love these products. My skin glows.

E
Ella
Recommend To a Friend: Yes
Value 1 = Poor Value, 5 = Excellent Value: 5
Must Have

Must have item for my morning routine. I've been using it for a few years now and can't start my day without it!

c
christ
Amazing

Great product.

A
Anna
age: 25 to 39 years old
Value 1 = Poor Value, 5 = Excellent Value: 2
Quality 1 = low, 5 = high: 4
Great but too pricey

Love this product however I don't know if I can keep justifing the price.$70 for 1oz! It was $45 when I started using it. Then it was out of stock for the longest time.

L
Lula
Recommend To a Friend: No
age: 40 to 60 years old
Value 1 = Poor Value, 5 = Excellent Value: 1
Quality 1 = low, 5 = high: 1
Simple Brilliant - Face: Burn and redness

I thought it was just me but I see other reviews not. I am a very busy person so I don't have much time for reviews - since I am off from work today - I decided to get more details on simple brilliant - I found exactly what happens to me on the reviews below so this is happening to other customers - I do expect a reply from Cosmedix on this - After applying a small amount to a freshly cleansed face, my skin starts to burn and turns bright red which lasts for about 10 minutes. I thought maybe it would take a couple tries for my skin to get used to it, but it happens every time. I can provide pics too -

T
Tmsteik
Recommend To a Friend: Yes
Value 1 = Poor Value, 5 = Excellent Value: 5
Quality 1 = low, 5 = high: 5
Amazing

I've used this for years and have never found a better staple product. It keeps my skin smooth and bright�.LOVE!

S
Susan M.
Very pleased with my purchase.

Very pleased with my purchase. Would recommend

M
Maritza B.
best serum

this serum is great. i love that it is not greasy, so I can wear makeup after I apply it and still look flawless. it keeps my skin clear and smooth.

L
Laura G.
Great Product!

Since using this product, I've noticed a definite difference in my dark spots and any hyperpigmentation! Highly recommend.

D
Desiree B.
Brighter skin

One of my first ever Cosmedix purchase. I used this with the mixing crystals added a extra punch in my regimen. I highly recommend using it only at night if you live somewhere sunny. I use mine during the winter in the kit and get a whole seasons worth of use.

G
Gloria J.
My skin has never looked

My skin has never looked this good, bright and glowing

A
Anonymous
Works Great!

My client says it works wonderful, and she will continue to use it!

A
Anonymous
Works Great!

My client says it works wonderful, and she will continue to use it!

A
Anonymous
Must have

Must have Simply Brilliant in ur skincare range. It works really fast. Within 1 month my skin tone have a huge improvement. My freckles almost gone, my skin look brighter. It doesn't look yellow anymore. I love it.

A
Anonymous
Must have

Must have Simply Brilliant in ur skincare range. It works really fast. Within 1 month my skin tone have a huge improvement. My freckles almost gone, my skin look brighter. It doesn't look yellow anymore. I love it.

C
Candice B.
love this!

love this!

M
Marisela V.
Love this cleanser. I use

Love this cleanser. I use this in the morning and use the Purity at night

C
Christina M.
Love the product. Evens out

Love the product. Evens out spots on my face and makes it feel nice.

H
Haley F.
Love Love my serum!

Love Love my serum!

S
Sydney J.
Great

Love how it feels on my skin. I have noticed a little difference in my spots.

K
Kathleen P.
It Works

It works! I have age spots, sun damage and acne scars and after 2 weeks these have decreased in appearance. It's going to take time but in general the formula is good compared to others used.

J
Janice C.
Esthetician recommended this to me - so far I love it!

I've only been using for a couple weeks, but I've noticed that my pigmentation is improving and helping with fading acne scars.

M
Meghan K.
Love This Product!!!

I've been using Simply Brilliant for a few weeks now and I already see a dramatic difference in my skin. I have hyperpigmentation and this has definitely helped with fading it while brightening my skin!

F
Fatmata K.
I'm glad there is a

I'm glad there is a restock. This serum is amazing.

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