Best K-Beauty Retinal Serum
MEDITHERAPY
MEDITHERAPY Retinal Skin Booster Serum – Retinaldehyde & Niacinamide, 5.07 fl oz
Verified: Sep 2, 2026
MEDITHERAPY Retinal Skin Booster Serum is a Korean skincare serum formulated with retinaldehyde, niacinamide and adenosine to support smoother-looking skin, hydration, radiance and a more even appearance.
Discounted Offer Price
$19.99
Expert Rating
9/10
Expert Analysis: Pros & Cons
What We Like
- •Contains retinaldehyde
- •ncludes niacinamide and adenosine
- •Large 5.07 fl oz size
- •Suitable for face, neck and body
Drawbacks
- •Retinal may cause dryness or irritation for some users
- •Beginners should introduce it gradually
The Bottom Line
"A strong option for users looking for a large-size retinal serum with added niacinamide and hydrating benefits. Its face-and-body format offers good versatility, while the fragrance-free formula makes it appealing to users who prefer simpler skincare formulas."
Key Feature Highlights
- Retinaldehyde formula
- Hydrating skincare
- Niacinamide
- Fragrance free
Product Overview & Review
MEDITHERAPY Retinal Skin Booster Serum is a K-Beauty facial and body serum designed for users who want to add retinaldehyde to their skincare routine. The formula combines retinaldehyde with niacinamide and adenosine to target concerns such as fine lines, uneven skin tone, dullness and visible pores.
The serum comes in a large 5.07 fl oz size, making it suitable not only for the face but also for areas such as the neck and body. Its fragrance-free formula is marketed for all skin types and focuses on hydration alongside skin-renewing benefits.
Niacinamide is included to support the skin barrier and hydration, while retinaldehyde is the main retinoid ingredient used for anti-aging and texture-focused skincare. The formula also contains adenosine as a supporting ingredient.
Because retinal products can still cause dryness or irritation in some users, beginners should introduce the product gradually and use sunscreen during the daytime. A patch test is also recommended before applying it more broadly.