Question 1

Is COSRX cruelty-free?

Accepted Answer

COSRX is a cruelty-free brand that does not test its products on animals. The brand is certified by Leaping Bunny and PETA, and it does not sell in markets where animal testing is required by law. Many COSRX products are also vegan-friendly, though consumers should check individual product labels for specific formulations.

Question 2

Where can I buy COSRX PDRN products?

Accepted Answer

COSRX PDRN products are widely available through major retailers including Amazon, Sephora, Ulta Beauty, YesStyle, and the official COSRX website (cosrx.com). In South Korea, they can be found at Olive Young stores nationwide. The brand ships internationally from most of these retailers, making their PDRN line accessible to consumers globally.

Question 3

What is the difference between Rejuran Healer, S, I, and HB?

Accepted Answer

Rejuran Healer is the original all-purpose skin booster (0.2% c-PDRN, standard viscosity) for overall skin rejuvenation, firmness, and elasticity — it is the most widely used variant and the best starting point for first-time patients. Rejuran S has a higher viscosity formulation that targets acne scars and textural irregularities by depositing concentrated PDRN directly into scar tissue for localized dermal repair. Rejuran I uses a thinner, lower-viscosity formulation specially designed for the delicate, ultra-thin periorbital skin to address dark circles, fine lines, and under-eye hollowing. Rejuran HB combines c-PDRN with non-crosslinked hyaluronic acid for dual-action hydration and regeneration, ideal for severely dehydrated or post-procedure skin. Your dermatologist will recommend the most appropriate variant based on your specific skin concerns and treatment goals.

Question 4

Is Rejuran the same as topical PDRN skincare products?

Accepted Answer

No, Rejuran products are fundamentally different from topical PDRN skincare. Rejuran products are clinical-grade injectable skin boosters administered by trained medical professionals (dermatologists and aesthetic physicians) in clinical settings using microinjection techniques. While topical PDRN products offer genuine benefits through surface and upper-epidermal penetration, Rejuran delivers c-PDRN directly into the papillary dermis where A2A receptors are most concentrated, achieving maximum bioavailability and significantly more dramatic results in skin thickness (measurable by ultrasound), elasticity (measurable by cutometer), and deep tissue repair. The two approaches are complementary: many patients use Rejuran injections for periodic intensive treatment and topical PDRN products for daily maintenance between clinical sessions.

Question 5

How often should Rejuran treatments be done?

Accepted Answer

A typical Rejuran treatment protocol involves an initial course of three to four sessions spaced two to four weeks apart, which allows each treatment to build on the collagen synthesis and tissue remodeling initiated by the previous session. Most patients begin noticing visible improvements in skin texture and elasticity after the second session. After completing the initial course, maintenance treatments are recommended every three to six months depending on individual skin condition, age, environmental exposure, and treatment goals — younger patients with mild concerns may need maintenance only every six months, while older patients or those in harsh environments may benefit from quarterly sessions. A board-certified dermatologist will assess your skin and provide a personalized treatment plan during your initial consultation.

Attribute	COSRX	Rejuran
Origin	🇰🇷 South Korea	🇰🇷 South Korea
Products in Catalog	3	6
Product Categories	essence, serum	ampoule, body-care, cleanser, cream
Average Rating	4.5	4.3
Price Range	$30–40, $24–32, $24–32	$40–60, $30–40, $50–70, $55–70, $45–65, $40–50
Official Website	Yes	Yes

COSRX vs Rejuran

COSRX

Rejuran

At a Glance

Products Comparison

COSRX (3)

5 PDRN Collagen Intense Vitalizing Serum

PDRN Advanced Snail Dual Essence

PDRN Niacinamide Brightening Serum

Rejuran (6)

Body Lotion c-PDRN

Cleansing Milk c-PDRN

Nutritive Cream c-PDRN

Recover c-PDRN Lifting Ampoule

Turnover Ampoule c-PDRN

UV Protection Cream SPF 50+ PA+++

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