Frequently Asked Questions
Product-Specific Questions
PDRN(Salmon DNA) Cream
What is "The Right PDRN"?
The Right PDRN means:
- 1,200 ppm optimal concentration (derived from absorption and safety reasoning)
- 99% purity (high-purity standard)
- Particle size < 1/3,000 of a pore for optimal penetration
We counter high-ppm marketing games, plant PDRN alternatives, and low-purity risks.
What products contain PDRN?
How do I use PDRN products?
AM/PM: Apply after serum, before barrier cream.
Can children use PDRN products?
As cosmetics, generally recommended for ages 3+. Patch test advised.
Can I use PDRN products during pregnancy?
As cosmetics, patch test is advised. Consult your healthcare provider.
Does PDRN help with post-laser care?
Yes, PDRN supports skin improvement during laser-care recovery.
How long should I use PDRN products?
A 28-day cycle is recommended for optimal results.
Can I use PDRN products during pregnancy?
As cosmetics, patch test is advised. Consult your healthcare provider.
Retinoid (HPR / Retino-Mela Serum)
What is "The New Retinoid"?
HPR (Hydroxypinacolone Retinoate) is 30× more stable than retinol and ultra gentle — beginner-friendly with minimal irritation.
How does Retino-Mela Serum control melanin?
t uses 4-way melanin control:
- HPR: Surface turnover
- Niacinamide 10%: Blocks melanin transfer
- TXA 4%: Blocks melanin production
- α-Bisabolol: Blocks melanin production + soothes
How do I use Retino-Mela Serum?
PM: Apply after toner.
AM use possible but sunscreen is required.
Can I use retinoid products during pregnancy?
Not recommended for pregnancy.
What age is appropriate for retinoid products?
18+ recommended for retinoid use.
Is Retino-Mela Serum tested for irritation?
Yes, non-irritation testing has been conducted.
LC-Ceramide (Barrier Cream)
What is "The Right Ceramide"?
Long-chain, skin-identical ceramide with patented composition (KR10-1816019). Unlike most products that use short-chain ceramides, our long-chain structure provides:
- Better skin fit
- Longer-lasting barrier
- Lightweight, non-greasy feel
What does the Advanced LC-Ceramide Barrier Cream do?
- Strengthens barrier
- Deep hydration
- Soothes and calms
How do I use the Barrier Cream?
AM/PM: Apply as the final step after serum or gel/cream.
Can children use the Barrier Cream?
As cosmetics, generally recommended for ages 3+. Patch test advised.
Can I use the Barrier Cream during pregnancy?
As cosmetics, patch test is advised. Consult your healthcare provider.
Is the texture suitable for warm or humid climates?
Yes, the lightweight texture is suitable for warm and humid regions.
Routine & Usage
What is the correct order for Dr. Reju-All products?
Follow this step order:
- Toner
- Serum (e.g., Retino-Mela Serum)
- Gel/Cream (e.g., PDRN Rejuvenating Cream)
- Moisturizer (e.g., LC-Ceramide Barrier Cream)
When should I use each product?
Check each product's usage directive:
- Daily AM/PM: Most barrier and hydration products
- PM only: Retinoid products (unless sunscreen is applied for AM use)
- Sometimes: As needed based on skin condition
Safety & Standards
What is Dr. Reju-All's clean standard?
We exclude harmful substances aligned with Olive Young's 42, common 10, Hwahae's 10, and other recognized clean standards. See our Free-From list on product pages.
Do I need to patch test?
Patch testing is advised for all products, especially for sensitive skin or first-time use.
What about origin documents for salmon DNA?
Salmon origin documentation is available and meets regulatory requirements.
Are Dr. Reju-All products safe for sensitive skin?
Yes. Products are formulated with stability, safety, and non-irritation testing. Patch test recommended.
