Jack Black Protein Booster Skin Serum vs Rejuran Dual Effect Ampoule In Mask Firming & Radiance
Jack Black Protein Booster Skin Serum scores 8.5/9.8 and Rejuran Dual Effect Ampoule In Mask Firming & Radiance scores 8.4/9.8 — a near-tie where your skin type decides the winner.
Head to head
Protein Booster Skin Serum
Dual Effect Ampoule In Mask Firming & Radiance
Score comparison
These two are neck and neck — just 0.1 points apart.
Scores last verified: July 2026
Attribute battle
Hydration Efficacy
Rejuran WINSIrritation Risk
TIEActive Ingredient Strength
Rejuran WINSIngredient Transparency
TIEFormulation Safety
TIEIngredient face-off
26% overlapOnly in Jack Black Protein Booster Skin Serum
20 unique
Shared ingredients
9 in common
Only in Rejuran Dual Effect Ampoule In Mask Firming & Radiance
26 unique
Why these two are neck and neck
These two serums take different paths to a similar destination. Both formulas include solid hydrating ingredients, and the overall scores reflect that — the gap here is genuinely slim.
Active Ingredient Strength is another area of separation. Rejuran Dual Effect Ampoule In Mask Firming & Radiance scores 5.8 here versus 5.3 for Jack Black Protein Booster Skin Serum. That difference comes down to how each formula is built — the ingredient list tells the story.
Jack Black Protein Booster Skin Serum brings Camellia Sinensis Leaf Extract, Dipeptide Diaminobutyroyl Benzylamide Diacetate, and Retinyl Palmitate as actives, while rejuran Dual Effect Ampoule In Mask Firming & Radiance relies on Glycyrrhiza Glabra Root Extract, Calendula Officinalis Flower Extract, and Niacinamide. Both approaches have merit, but the positioning and supporting ingredients make the difference.
Best for your skin type
Jack Black Protein Booster Skin Serum is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Dry or dehydrated skin that craves moisture, thanks to Glycerin
- Anyone who prefers clean, well-vetted formulations
Rejuran Dual Effect Ampoule In Mask Firming & Radiance is better if you have
- Sensitive skin — the low-irritation formula keeps things gentle
- Dry or dehydrated skin that craves moisture, thanks to Aloe Barbadensis Leaf Juice
- Anyone who prefers clean, well-vetted formulations
Value comparison
At premium pricing with a score of 8.5, Jack Black Protein Booster Skin Serum delivers strong value. Rejuran Dual Effect Ampoule In Mask Firming & Radiance sits at the mid-range level with a 8.4 score — the extra cost doesn't translate to better scores here.
Our verdict
It's a close call — both products score within 0.3 points of each other. Your choice depends on your specific skin concerns.
Frequently asked questions
Which is better: Jack Black Protein Booster Skin Serum or Rejuran Dual Effect Ampoule In Mask Firming & Radiance?
Based on ingredient analysis, Jack Black Protein Booster Skin Serum scores higher overall. See the full score breakdown above for details on each attribute.
Do Jack Black Protein Booster Skin Serum and Rejuran Dual Effect Ampoule In Mask Firming & Radiance share ingredients?
Yes, they share common ingredients. Check the ingredient face-off section above for a detailed comparison.
What's the main difference between Jack Black Protein Booster Skin Serum and Rejuran Dual Effect Ampoule In Mask Firming & Radiance?
The key differences are in their active ingredients and formulation approach. Check the attribute battle above for a detailed breakdown.