






Suero Facial de Oxígeno Kay's Glow
A vitamin C glow serum made for skin that reacts.
4.83 · 92% five-star · Reviews
“I absolutely love it and it smells so nice! It’s not too overpowering but has a nice citrusy scent, perfect for even my sensitive skin! The glow is amazing too!”
Glow, without the sting
Vitamin C can sting skin that reacts. Kay’s Glow Oxygen Serum was co-created with Kaylee Dudley, who has very reactive skin, and formulated by licensed esthetician Holly Tanella. THD vitamin C stays fresh instead of turning orange, a gentle AHA trio lifts dull surface cells, and oxygen with hyaluronic acid leaves skin dewy. Light citrus scent. Contains AHAs: wear SPF 30 or higher by day.
- 1Stays fresh
THD ascorbate resists oxidizing, so the serum stays pink instead of turning orange once opened.
- 2Made for skin that stings
98% of sensitive-skin users reported zero stinging.* “I never had a reaction to the serum!!!” Crystal M.
- 3Glow that layers
96% reported looking visibly more radiant, and 99% said it layered flawlessly with sunscreen.*
With Infinite Aura
Infinite Aura, $139.99 with Kay’s: the moisturizer Kay’s is mixed on. One pump on the top plate, 3 to 5 drops of Kay’s, swirl. Three ceramides, a firming peptide, lavender. 98% said it absorbed instantly, never heavy.* Ships free.
Why it costs what it does
- What you get
- A full ounce, three to five drops a use.
- How long it lasts
- Three to five drops a night. Most refill every 10 weeks.
- What it replaces
- Four bottles in one: vitamin C serum, exfoliating acids, oxygen serum, hydrating serum.
- Compared with
- The DUO with Infinite Aura, $139.99, against $144.98 bought separately.
*Results derived from the Bohemia Skin Community Perception Study.
Full ingredient list from the label
Agua purificada, extracto de hoja de aloe barbadensis, propanodiol, glicéridos caprílicos/cápricos PEG6, glicerina, oxígeno, ácido hialurónico, butilenglicol, ácido glicólico, dimeticona, etoxidiglicol, ácido láctico, extracto de fruta de Vaccinium Myrtillus, ascorbato de tetrahexildecilo (vitamina C), ácido málico, PCA sódico, betaglucano, extracto de Saccharum Officinarum (caña de azúcar), glicina (y) alanina, extracto de fruta de Citrus Aurantium Dulcis (naranja), extracto de fruta de Citrus Limon (limón), extracto de Acer Saccharum (arce de azúcar), lactato de sodio, arginina, extracto de raíz de Beta Vulgaris (remolacha), serina, valina, prolina, ciclometicona, extracto de fruta de Citrullus lanatus (sandía), extracto de hematita, ácido cítrico.
Made with Kaylee
In 59 seconds: Holly and Kaylee on why this serum exists, and what skin that reacts needs from vitamin C.
Holly Tanella, co-founder · Kaylee Dudley, co-creator of Kay’s Glow Oxygen Serum
Fig. 1 Before and after, skin like yours


Kaylee, on The System, which includes Kay’s. Her own photos. Lighting and conditions vary. Individual results vary.
Becca, on Kay’s Glow Oxygen Serum and Boho Cleansing Balm. Her own photos. Lighting and conditions vary. Individual results vary.


Ashvianey, on Kay’s Glow Oxygen Serum. Her own photos. Lighting and conditions vary. Individual results vary.
Rose, on The System. Her own photos. Lighting and conditions vary. Individual results vary.


Kristen, on Kay’s Glow Oxygen Serum. Her own photos. Lighting and conditions vary. Individual results vary.


Kayla, on The System. Her own photos. Lighting and conditions vary. Individual results vary.
Fig. 2 What participants reported
- 99%
said it layered flawlessly with sunscreen
- 98%
of sensitive skin users reported zero stinging
- 98%
reported it as a highly effective dark spot fader
- 96%
reported looking visibly more radiant
*Results derived from the Bohemia Skin Community Perception Study. Kay’s contains AHAs: wear SPF 30 or higher by day.
Fig. 3 How to use it

Massage onto dry skin, add water, rinse. It turns to milk and takes the day off.

Pump Infinite Aura onto its flat top plate and add 3 to 5 drops of the serum there. Never in your palm.

Mix on the top plate and press the blend into your skin. Lavender and vanilla to end the day.
Pump Infinite Aura onto the top plate, add 3 to 5 drops of Kay’s, swirl, press in. Balm first if you want it. Finish with SPF 30 or higher: Kay’s contains AHAs.

Reviews from skin like yours
every review of this product
Showing: a few favorites. Tap a chip to see reviews from skin like yours.
“It’s not too overpowering but has a nice citrusy scent, perfect for even my sensitive skin! The glow is amazing too!”
Ashvianey, verified buyer
“On my fourth bottle! I wasn’t sure about this at first but I never had a reaction to the serum!!!”
Crystal M., verified buyer
“I’m an average person, at 28 years old… I also have ridiculously sensitive skin that TRULY reacts to everything”
Brittany B., verified buyer
“So glowy and hydrating. I’m obsessed!”
Kalista, verified buyer
“This is definitely a new staple in my daily skincare! I use it twice a day in some moisturizer and that’s it’s for my skincare”
Anissa, verified buyer
“The glow serum is a great base for my makeup. I use this everyday I wear makeup and am on my second bottle now!”
Julie, verified buyer
“Also say that sunscreen is a MUST after using this serum”
Maryam H., verified buyer
“It smells great, but unfortunately made me break out. However, I had to give some stars because the customer service was amazing.”
Cinderella, verified buyer
“I’ve been waking up with swollen eyes and now have spots of dry irritation/itchy skin around my eyes.”
Tina, verified buyer
Nothing here yet. Every review is shown as written.
Every review, as written
Why it’s made this way
- Made in small batches. Holly formulates it, and every batch is checked against its spec before it ships, with a Certificate of Analysis on file.
- Made by Holly Tanella, licensed esthetician and owner of Boho Med Spa. Co-created with Kaylee Dudley, who has very reactive skin.
- Formulated without any ingredient listed by California’s Proposition 65 as a reproductive toxicant.
Before you buy: sensitive skin, how to use it, returns
98% of sensitive skin users reported zero stinging. Kay's was co-created with Kaylee Dudley, who has very reactive skin. Patch test first and keep it away from the eye area. Not right for your skin? Send it back within 30 days of delivery, even opened.
Either. It contains AHAs (glycolic, lactic and malic), so wear SPF 30 or higher every morning you use it.
Pump Infinite Aura onto its top plate, add 3 to 5 drops of Kay's there, swirl, and press it in. Never mix in your palm.
Pink means fresh. Its vitamin C is THD ascorbate, an oil-soluble form that resists oxidizing, so the serum stays pink instead of turning orange the way many vitamin C serums do.
1 oz is the everyday bottle. Travel 0.5 oz is a smaller first try. Kay's + Infinite Aura is the pair you mix together on Aura’s top plate.
It contains AHAs and no retinoids. Check with your healthcare provider before starting any skincare while pregnant or breastfeeding.
Ships in 1 to 2 business days. The 1 oz and the pair ship free in the US; the travel size ships free on orders over $79, and Auto Refill always ships free. 30-day money back from delivery, even opened: you pay return shipping and the refund goes to your original payment.
Learn: from Skin Intelligence, our journal
Keep it a year on Auto Refill
$120.00 less than buying once
20% off. 25% from box 3, 30% from box 5. Ships free. Skip or cancel anytime.
Make it the whole routine
Boho Cleansing Balm, Kay’s Glow Oxygen Serum and Infinite Aura, all full size: $184.97 separately, $167.99 together, shipped free.
On Auto Refill, $134.39, less than Kay’s and Aura bought once. 20% off. 25% from box 3, 30% from box 5. Ships free. Skip or cancel anytime.
Infinite Aura, $64.99: more than a moisturizer. Three ceramides, beta glucan, aloe and hyaluronic acid for soft, comfortable skin; a signature peptide for a firmer look; lavender. 99% of sensitive-skin users reported zero stinging.*
Renews every 10 weeks until you cancel.
*Results derived from the Bohemia Skin Community Perception Study.
Kay’s, on your schedule.
Auto Refill renews every 10 weeks. 20% off. 25% from box 3, 30% from box 5. Ships free. Skip or cancel anytime.
Ships free over $79. Always ships free on Auto Refill. Kay’s travel size offer: TRYKAY can cover eligible U.S. shipping rates up to $10 on one-time orders of $40 USD or more after discounts through Oct 31. Once per customer. Subscriptions excluded. May combine with product discounts, but not order or shipping discounts. Checkout confirms eligibility and the final total. 30-day money back, even opened.
Renews every 10 weeks. 20% off. 25% from box 3, 30% from box 5. Ships free. Skip or cancel anytime.
