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4.7
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Expert Recommended Zero-irritation formula · Dermatologist tested

Ultra Clarifying Bio Exfoliating Serum 4% Glycolic Acid

67,00  63,65 

FREE SHIPPING IN EUROPE AND UK

REFINES TEXTURE · EVENS & BRIGHTENS TONE · SUPPORTS SKIN RENEWAL

A multifunctional overnight serum designed to resurface, clarify and strengthen in one controlled step.

With a precise 4% glycolic acid concentration, it helps lift dull surface cells, refine the look of pores and support natural skin renewal. A targeted peptide complex contributes to visible firmness and structural resilience, while lipid-rich botanical oils reinforce barrier integrity to prevent post-exfoliation dryness.

Humectants maintain hydration as fresh cells emerge, and calming botanicals help minimise visible redness. With continued use, tone appears more even, texture smoother, and the look of post-blemish marks visibly softened.

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5% 1 Product Starter
10% 2 Products Duo Ritual
15% 3 Products Full Ritual
Serum
Step 1 · AM / PM Elixir Intense Bio Regenerating Serum 30ml · 11 Botanical Oils
56,00 € 56,00 €
Day Cream
Step 2 · AM Elixir Intense Bio Regenerative Day Cream 50ml · SPF Protection · CoQ10
67,00 € 67,00 €
Night Cream
Step 3 · PM Elixir Ultra Rich Bio Regenerating Night Cream 50ml · Peptides · Deep Repair
67,00 € 67,00 €
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Product details

A biotech-driven exfoliating serum formulated to resurface gently while preserving barrier integrity.

Powered by 4% glycolic acid, renewal-supporting peptides and antioxidant protection, it helps refine texture, improve tone clarity and maintain skin comfort during active exfoliation. Nutrient-rich oils and humectants replenish hydration to prevent dryness commonly associated with acids.

SKIN TYPE

Ideal for dull or uneven skin tone, visible pores, rough or textured skin, early fine lines and post-blemish marks. Suitable for combination, breakout-prone or mildly sensitive skin that tolerates low-percentage AHAs. Not recommended for compromised, highly reactive or freshly treated skin until the barrier has stabilised.

50 ml


Dermatologically tested · Non-iritant · Alcohol-free · Fragrance-free · Silicone-free · Paraben-free · Vegan

Benefits

Controlled Exfoliation
4% glycolic acid helps dissolve surface cell build-up to smooth and clarify.

Visible Brightness
Promotes a fresher, more even-looking complexion.

Renewal Support
Biomimetic peptides help maintain firmness and structural integrity during resurfacing.

Barrier Comfort
Prickly pear and argan oils replenish essential lipids to reduce dryness and tightness.

Hydration Balance
Glycerin and propanediol attract moisture to support suppleness post-exfoliation.

Antioxidant Protection
Vitamin E and botanical extracts help defend against oxidative stress associated with renewal.

List of ingredients

4% Glycolic Acid – the smallest AHA molecule, gently loosens the bonds between dull surface cells to smooth texture, refine the look of pores and brighten uneven tone.

Myristoyl Tripeptide-31 – supports surface renewal and helps improve the appearance of early fine lines without irritation commonly associated with retinoids.

Myristoyl Tetrapeptide-6 – contributes to improved firmness and elasticity by supporting the skin’s natural repair mechanisms.

Myristoyl Tetrapeptide-34 – helps calm visible redness and supports protection against environmental stress that can weaken skin structure.

Palmitoyl Pentapeptide-4 – a signal peptide that supports collagen pathways, helping improve smoothness and visible firmness.

Methyl Undecenoyl Leucinate – helps even out tone and enhance overall radiance.

Prickly Pear Seed Oil – a lightweight, antioxidant-rich oil that replenishes lipids and reduces tightness during exfoliation.

Argan Oil – rich in essential fatty acids, helps reinforce the barrier and maintain suppleness.

Glycerin – a humectant that draws moisture into the skin to maintain hydration after resurfacing.

Propanediol – supports moisture retention and enhances ingredient penetration for improved hydration efficiency.

Clary Sage Extract (Salvia Sclarea) – a soothing botanical that helps reduce visible redness and rebalance stressed skin.

Vitamin E Acetate (Tocopheryl Acetate) – an antioxidant that helps neutralise oxidative stress associated with exfoliation.

 

ALL INGREDIENTS: Water (Aqua), Prickly Pear Seed Oil (Opuntia Ficus-Indica Seed Oil), Glycerin, Argan Oil (Argania Spinosa Kernel Oil), Glycolic Acid, Propanediol, Clary Sage Extract (Salvia Sclarea Extract), Phenoxyethanol, Ethylhexylglycerin, Sodium Benzoate, Potassium Sorbate, Ammonium Acryloyldimethyltaurate/VP Copolymer, Vitamin E Acetate (Tocopheryl Acetate), Myristoyl Tetrapeptide-34, Myristoyl Tetrapeptide-6, Myristoyl Tripeptide-31, Palmitoyl Pentapeptide-4, Methyl Undecenoyl Leucinate, Butylene Glycol, Xanthan Gum, Sodium Hydroxide.

How it works

Surface dullness and congestion occur when dead cells accumulate and renewal slows.

This formula accelerates desquamation using a calibrated 4% glycolic acid concentration, helping loosen surface cell bonds and promote fresher skin turnover.

Peptides support structural proteins involved in firmness, helping maintain resilience during exfoliation.

Humectants restore hydration to newly revealed cells, while omega-rich botanical oils reinforce the lipid barrier to minimise irritation.

Antioxidants help counteract oxidative stress triggered during active resurfacing.

The result is renewed skin clarity without compromising comfort.

 

APPLICATION AND INSTRUMENTAL TESTS RESULTS

Key strengths: Outstanding clarifying + exfoliating performance, visible texture/pore refinement, while still being hydrating and gentle.

Application properties 

  • Consistency, application, efficiency, spreading: 100% positive.
  • Color pleasant: 73.33%.
  • Smell pleasant: 53.33% (mostly neutral/pleasant).

User-perceived effectiveness 

  • Promotes clearer, more even-looking skin: 100% (confirmed).
  • Moisturizes the skin: 100% (confirmed).
  • Smooths fine lines: 93.33% (confirmed).
  • Exfoliates the skin: 86.67% (confirmed).
  • Would buy again / use regularly / recommend: 73–93%.

Instrumental results 

  • Moisturization: +12.38% (ASW 300).
  • Wrinkles (width): –7.13% (NATI V3).
  • Melanin (discoloration/even tone): –4.10% (NATI V3 UV).
  • Pores: –3.32% (ASW 300).
  • Skin texture: –11.77% improvement (ASW 300 3D).
  • Exfoliation: Clear visual improvement (corneum strip photos).

Conclusion from lab: Fully confirms all claims + measurable improvements in tone, pores, texture, and exfoliation. No side effects.

*Independent, standardized application + instrumental tests conducted by Skin Lab P.S.A. (Krakow, Poland) on 15 female volunteers (application test) + 10 female volunteers (instrumental test), aged 28–78 with normal skin, over 4 weeks of real-world home use. Tests followed EU cosmetic regulations, Helsinki Declaration, and Cosmetics Europe guidelines.  No side effects were reported in any of the studies.

How to use

Apply in the evening after cleansing, avoiding the eye area.

Begin 2–3 times per week and increase frequency as tolerated. Follow with a gentle moisturiser if needed.

Daily SPF is essential during use.

Ritual pairing: Layer with Elixir Intense Bio Regenerating Serum for overnight recovery.

 

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Real Results

Rated on Trustpilot
4.7
View all reviews on Trustpilot
Customer result

"My skin has never felt so nourished. It feels like a treat that protects and heals at the same time."

@carobarcellona Elixir Intense Bio Regenerating Serum
Customer result

"I have sensitive skin and this is the first serum that hasn't caused any redness. Absolutely love it."

@verified buyer Ultra Clarifying Bio Exfoliating Serum
Customer result

"The glow is real. My skin looks visibly smoother and brighter after just two weeks of use."

@anagav.osorno The Power Trio Bundle
Customer result

"Such a luxurious texture. It sinks in immediately and my skin stays hydrated all day — no greasiness at all."

@verified buyer Elixir Intense Bio Regenerative Day Cream

"My skin has never felt so nourished. It feels like a treat that protects and heals at the same time."

@carobarcellona Elixir Intense Bio Regenerating Serum

"I have sensitive skin and this is the first serum that hasn't caused any redness. Absolutely love it."

@verified buyer Ultra Clarifying Bio Exfoliating Serum

"The glow is real. My skin looks visibly smoother and brighter after just two weeks of use."

@anagav.osorno The Power Trio Bundle

"Such a luxurious texture. It sinks in immediately and my skin stays hydrated all day — no greasiness at all."

@verified buyer Elixir Intense Bio Regenerative Day Cream

See why customers love Sacra

CLINICAL DATA

Visible results, scientifically validated

+11.77%

improved skin texture after 4 week

+12.38%

skin hydration after 4 weeks

-7,13%

wrinkle reduction after 4 weeks

100%

confirmed clearer, more even-looking skin

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