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XO AndBloom Serum
Boost
$85.00
XO AndBloom Serum
XO Collection

XOSerum

A concentrated plant-exosome serum used after XO Essence to support hydration, visible radiance, comfort, and a more receptive-looking surface before targeted treatment, renewal, seal, finish, or SPF.

All Skin TypesBoostAM / PMPlant Exosome Complex
$85.00 30 ml / 1 fl oz
100% PLASTIC-FREE
Formulated & shipped from Resonance Marin, Marin County, CA
Returns accepted within 30 days — half-full minimum
Boost
Concentrated support after XO Essence for hydration, visible radiance, and comfort.
3
Botanical exosome sources: Damask rose, calendula, and Haberlea.
4x
Hyaluronic acid system for layered hydration support.
100%
Plastic-free aluminum packaging, fully recyclable.
The Brief

The concentrated
boost step.

XO Serum is the concentrated Boost step in the INBAR+co sequence. Apply it after XO Essence, when the skin is hydrated and ready for a more supportive serum layer.

Read more

The formula combines Damask rose, calendula, and Haberlea extracts with four-weight hyaluronic acid, beta-glucan, amino acids, niacinamide, panthenol, allantoin, Artemisia, aloe, and arnica to support comfort, hydration, resilience, and visible luminosity.

Use morning or evening before targeted treatment, renewal, seal, finish, or SPF. The goal is not to overload the routine, but to make the next steps feel better supported.

The Brief
Where it fits
The
sequence.
Morning
or evening.

XO Serum is the Boost step. Apply after XO Essence and before targeted treatment, renewal, seal, finish, or SPF.

01
Cleanse
Gentle Cleanser
Removes buildup without stripping.

Cleanse first so the routine lands on balanced skin. A non-stripping cleanse keeps the surface comfortable before activation and boost steps.

02
Activate
XO Essence
First hydrating layer.

Apply after cleansing to hydrate and prepare the surface. XO Essence is the Activate step before XO Serum.

03
Boost
XO Serum
Concentrated plant-exosome serum.
You are here

Apply after XO Essence while skin is still hydrated. Use morning or evening before targeted treatment, renewal, seal, finish, or SPF.

04
Treat
C Serum
Morning radiance support.

Use after XO Serum in the morning when radiance and tone are the focus. Follow with Shield SPF 35+.

05
Renew
Renew PM
Evening renewal support.

Use after XO Serum in the evening when the routine calls for renewal. Start slowly, and keep the rest of the routine simple if skin feels reactive.

06
Seal
Recovery Cream
Comfort seal when skin needs support.

Apply after serum or renewal steps when skin needs a richer comfort layer. Recovery Cream is the Seal step.

Build Around This Step
Choose the next level of commitment: one product, a pair, a starter trio, or the full system.
Gentle Cleanser Foundation
Cleanse
Gentle Cleanser

The barrier-safe cleanse before XO Essence and XO Serum.

$30.00Discover
XO Kit System
XO Kit
XO Kit

The complete XO sequence built around XO Essence and XO Serum.

$245.00View Kit
2015
Built with Denise Boomkens of AndBloom, who has been photographing real women at every age for over a decade and refuses to call any of it a problem. This is the serum that supports that work. Correctly dosed actives, real results, no agenda to make skin look like a different decade.
— Daniella Inbar, Founder
The Science

A boost step should support comfort, hydration, and visible luminosity without crowding the routine.

01
Plant Exosome Complex / Boost
Damask rose, calendula, and Haberlea extracts support the formula's Boost role: hydrated-looking, comfortable, more luminous skin after XO Essence.
02
Damask Rose + Calendula / Botanical Support
Rose and calendula-derived extracts support a calmer, softer-looking surface and help keep the formula elegant, lightweight, and easy to layer.
03
Haberlea / Resilience Support
Haberlea Rhodopensis Leaf Extract is selected for resilience-focused botanical support and the look of hydrated, more responsive skin.
04
Beta-Glucan + Amino Acids / Comfort Support
Beta-glucan, glycine, proline, hydrolyzed rice protein, and hydrolyzed pea protein help skin feel more comfortable, supported, and smooth through active routines.
05
4-Weight Hyaluronic Acid / Layered Hydration
Multiple forms of hyaluronic acid support a hydrated, plumper-feeling surface and help XO Serum sit comfortably between XO Essence and targeted treatment steps.
From the Treatment Room

Tips
from the spa.

XO Serum belongs after XO Essence when skin needs a more concentrated support layer. Keep it between activation and targeted steps so the routine feels supported, not crowded.

XO Layering
Apply XO Essence first, then XO Serum while skin is still hydrated. This keeps the Boost step light, comfortable, and easy to layer.
Morning Radiance
Use XO Serum before C Serum when the morning routine is focused on radiance and tone. Finish with Shield SPF 35+.
Evening Renewal
Use XO Serum before Renew PM when skin is stable and ready for a more active evening routine. If skin feels reactive, simplify and seal with Recovery Cream.
Keep the Routine Clean
XO Serum is concentrated, so avoid stacking too many strong active steps at once. Let it be the Boost layer, then choose one targeted direction for the rest of the routine.
The Details

Every question,
answered.

Formulated at Resonance Marin. Tested on real skin. These are the questions that matter most.

Where does XO Serum fit in the sequence?
XO Serum is the Boost step. Use it after Gentle Cleanser and XO Essence, then follow with targeted treatment, renewal, seal, finish, or SPF.
Is XO Serum the same as XO Essence?
No. XO Essence is the Activate step and first hydrating layer after cleansing. XO Serum is the concentrated Boost step used after XO Essence.
What are plant exosomes in this formula?
In this formula, plant exosome extracts are used as cosmetic botanical support for hydration, comfort, and visible luminosity. They should be understood as skincare support, not medical regeneration.
Can I use XO Serum with Renew PM?
Yes, when skin is stable. Use XO Serum before Renew PM in the evening, then seal with Recovery Cream if skin needs comfort. Start slowly if your routine already includes active steps.
Can I use XO Serum with C Serum?
Yes. Use XO Serum before C Serum in the morning when the routine is focused on radiance and tone, then finish with Shield SPF 35+.
How often should I use XO Serum?
Start once daily, morning or evening. Increase only if skin stays comfortable and your routine is not overloaded with other active steps.
Is XO Serum suitable for sensitive-feeling skin?
It is designed to support comfort and hydration, but concentrated routines should be introduced gradually. If skin feels reactive, simplify the routine and use Recovery Cream.
Formula Feel
Lightweight serum, soft floral finish.

A lightweight serum texture that absorbs quickly and layers easily after XO Essence. The natural aromatic profile is soft and floral, with rose de mai, mandarin, apricot, and jasmine.

Rose de MaiTop
Mandarin + ApricotHeart
JasmineHeart
Lightweight SerumTexture
Full Ingredient List
Every ingredient, listed.
Aqua, Xylitylglucoside, Anhydroxylitol, Xylitol, Propanediol, Trehalose, Sodium PCA, Sorbitol, Sodium Hyaluronate, Saccharide Isomerate, Citric Acid, Sodium Citrate, Rosa Damascena Callus Culture Extract, Calendula Officinalis Meristem Cell Extract, Haberlea Rhodopensis Leaf Extract, Artemisia Vulgaris Extract, Glycerin, Beta-Glucan, Hydrolyzed Rice Protein, Hydrolyzed Pea Protein, Glycine, Proline, Allantoin, Sodium Phytate, DL-Panthenol, Aloe Barbadensis Leaf Juice Powder, Sodium Hyaluronate Crosspolymer, Niacinamide, C13-14 Isoparaffin, Sodium Acetylated Hyaluronate, Arnica Montana Flower Extract, Hydrolyzed Sodium Hyaluronate, Polyacrylate Crosspolymer-6, Polyacrylamide, Propylene Glycol, Laureth-7, Limonene, Linalool, Benzyl Alcohol, Citral, Citronellol, Eugenol, Farnesol, Geraniol, Benzyl Salicylate, Benzyl Benzoate

Add the concentrated boost step.

XO Serum supports hydration, visible radiance, comfort, and a more receptive-looking surface after XO Essence, giving active routines a better-supported layer to build on.

$85.00XO Serum
View XO Kit →