MEDICUBE 21% Red Succinic Acid Cleansing Booster Serum

MEDICUBE 21% Red Succinic Acid Cleansing Booster Serum

Clear away buildup and refresh congested skin in just one minute with the MEDICUBE 21% Red Succinic Acid Cleansing Booster Serum, a wash-off acne cleansing booster designed to help improve the look of clogged pores, excess oil, blackheads, rough texture, and acne-prone skin in a single-step, one-minute treatment. Formulated with 21% Succinic Acid, Lactic Acid (AHA), and Salicylic Acid (BHA), plus MEDICUBE's patented Hydra Calm™ and Derma-Clera™ soothing complexes, this concentrated acid formula cleanses skin's impurities from deep within pores and skin crevices while minimizing irritation — making it safe for sensitive and acne-prone skin.

The succinic acid in this formula is derived from amber — a natural "Spirit of Amber" extract used as a cosmetic elixir for thousands of years — at 21% concentration alongside Lactic Acid and Salicylic Acid for a triple-acid system that dissolves dead skin, sebum, and pore debris simultaneously. The Hydra Calm™ complex provides soothing support during treatment and Derma-Clera™ supports skin clarity after rinsing — the dual-complex approach that allows a 21% acid formula to work on even sensitive and acne-prone skin without excessive irritation.

The MEDICUBE 21% Red Succinic Acid Cleansing Booster Serum is a great choice for anyone looking for a Korean acne treatment, pore-clearing acid serum, or wash-off exfoliating booster for blackheads, uneven texture, and oily skin. FSC-certified sustainable packaging, soy ink printing, fully recyclable box and container.

Size: 40g / 1.41 oz

Overview

The MEDICUBE 21% Red Succinic Acid Cleansing Booster Serum is a fast-acting wash-off booster treatment that targets excess sebum, dead skin buildup, blackheads, and uneven texture in just one minute as part of either a morning or evening cleansing routine. After just one use, it creates a skin environment that helps prevent future breakouts and leaves skin looking smoother, clearer, and more radiant — while the Hydra Calm™ and Derma-Clera™ complexes keep the treatment comfortable for acne-prone and sensitive skin types.

Clinical results — after just 1 minute, 1 use

• Sebum excretion — 29.7% decreased
• Amount of dead skin cells — 38.9% decreased
• Blackheads and whiteheads — 29.3% decreased
• Debris inside pores — 99.3% decreased
• Skin texture / unevenness — 9.7% decreased
• Skin radiance — 7.2% increased
• Hydration retention — 6.5% increased

Brand-reported clinical test results. Individual results may vary.

Key benefits

• Helps reduce the look of excess oil and pore buildup in one minute
• Helps improve the appearance of blackheads and whiteheads
• Supports smoother-looking skin texture and improved radiance
• 21% concentrated triple-acid formula with Succinic Acid, Lactic Acid, and Salicylic Acid
• Patented Hydra Calm™ and Derma-Clera™ complexes minimize irritation for sensitive and acne-prone skin
• FSC-certified sustainable packaging — recyclable box and container

How to use

After cleansing, lightly pat skin dry — leave slightly damp. Apply 2 drops to the full face or areas of concern. Gently massage and leave on for exactly 1 minute, then rinse thoroughly with lukewarm water. Finish with toner, serum, and moisturizer as usual.

Alternative daily method: Add 1 drop to 700ml of lukewarm water in the sink and wash the face by lightly splashing the diluted water for a milder daily application.

When first trying the product, start with once or twice a week and increase frequency based on skin tolerance. Patch testing is strongly recommended before first use, especially for acid-sensitive skin.

Note: A purging period is possible with first use — as a high-concentration active ingredient formula, skin may temporarily show redness or flaking as it adjusts. This is expected and typically resolves with continued use.

Use sunscreen every morning when using exfoliating acids.

Why we love it

The name says everything: one minute, and the numbers back it up. The MEDICUBE 21% Red Succinic Acid Cleansing Booster Serum achieves a 99.3% decrease in pore debris in a single sixty-second treatment — which is the kind of result that typically requires an in-office treatment or an extended overnight peel. What makes this possible at such a high active concentration without being intolerable for sensitive skin is the Hydra Calm™ and Derma-Clera™ patented soothing complexes that MEDICUBE developed specifically to pair with their high-concentration acid formulas. The succinic acid itself — the "Spirit of Amber" extract that has been used for thousands of years as a cosmetic active — is an acne-specific acid that combines surface exfoliation with anti-inflammatory and bacteria-environment-disrupting properties, making it more targeted to blemish-prone skin than conventional AHA-only or BHA-only treatments. Lactic Acid provides the surface smoothing that succinic acid alone doesn't achieve. Salicylic Acid penetrates the pore lining to dissolve oil-based buildup from within. Together at 21% concentration they deliver the 38.9% dead skin reduction, 29.7% sebum decrease, and 99.3% pore debris clearance that the clinical results confirm — in one minute. At BestSkincareUSA.com, it's the most targeted acne and pore-clearing treatment in the MEDICUBE line and one of the most clinically impressive one-minute wash-off treatments in Korean skincare.

Key ingredients deeper dive

• Succinic Acid — natural "Spirit of Amber" extract at 21% concentration for acne-specific exfoliation — Succinic acid is a naturally occurring dicarboxylic acid derived from amber (succinite) — a substance used in traditional cosmetics for thousands of years. At 21% concentration in the MEDICUBE 21% Red Succinic Acid Cleansing Booster Serum, it dissolves dead skin, sebum, and pore-clogging debris while simultaneously creating a skin environment that inhibits the growth of acne-causing bacteria — a dual exfoliation-and-prevention function that AHA and BHA alone don't provide. Its anti-inflammatory properties make it notably better tolerated than equivalent concentrations of traditional acids on acne-prone and blemish-sensitive skin across all Korean skincare brands.
• Lactic Acid (AHA) and Salicylic Acid (BHA) — complementary acid exfoliation at all skin depths — Lactic Acid (AHA) provides surface-level resurfacing — smoothing skin texture, removing dead skin cell buildup, and brightening the complexion at the skin's uppermost layer. Salicylic Acid (BHA) is oil-soluble and penetrates into the pore lining to dissolve the sebum and comedone material that AHAs and succinic acid can't reach. Together with the succinic acid, they form a complete triple-acid system that clears the skin at every depth — surface, skin-cell layer, and pore interior — in the one-minute treatment window of the MEDICUBE 21% Red Succinic Acid Cleansing Booster Serum.
• Hydra Calm™ and Derma-Clera™ — patented soothing complexes enabling high-concentration acid for sensitive skin — MEDICUBE's two proprietary soothing complexes are what make a 21% acid formula usable on sensitive and acne-prone skin without requiring a lengthy recovery period. Hydra Calm™ provides hydration-maintaining soothing support during the one-minute treatment to prevent moisture loss and barrier disruption while the acids work. Derma-Clera™ supports skin clarity and barrier restoration after rinsing, helping the skin maintain its improved appearance and continue recovering after the treatment is complete. Together they are the reason MEDICUBE can formulate at 21% concentration and still classify this as suitable for sensitive skin.

Who it's for

The MEDICUBE 21% Red Succinic Acid Cleansing Booster Serum is designed for all skin types — particularly oily, combination, acne-prone, or congested skin dealing with visible pores, blackheads, excess sebum, and rough texture who want a fast-acting, high-efficacy acid treatment that fits into the cleansing step of their routine. The patented soothing complexes also make it accessible for those with sensitive skin who want the results of a concentrated acid treatment without the typical recovery period. Start with once or twice a week and build frequency with tolerance. Evening use only when building up — once established, can be used morning and evening.

Pro tips and pairings

The one-minute timing is not approximate — set a timer. Too short and the acids won't complete their exfoliation cycle; too long and the formula can irritate. Apply to slightly damp skin (not soaking wet) — residual moisture helps the formula spread evenly and begin working immediately. For the most impactful pore-clearing routine, pair the MEDICUBE 21% Red Succinic Acid Cleansing Booster Serum in the evening with the MEDICUBE Zero Pore One-day Serum on alternate nights — the booster handles immediate deep pore cleaning and sebum clearance, and the overnight serum handles ongoing pore refinement and texture improvement. Do not use both on the same evening. Always use broad-spectrum SPF the morning after use. Explore more from MEDICUBE: Shop MEDICUBE