Comparison
iUNIK Beta Glucan Power Moisture Serum vs numbuzin No.5 Vitamin-Niacinamide Concentrated Serum
Two serums that compete for the same routine slot. Below is the honest side by side: what makes each one different, who each one is best for, and how real users rate them.

iUNIK
Beta Glucan Power Moisture SerumSingle hero ingredient serum with beta glucan, deeply hydrating and calming.

numbuzin
No.5 Vitamin-Niacinamide Concentrated SerumA 10% niacinamide + ascorbyl glucoside serum aimed at glow and tone evenness. K-beauty answer to The Ordinary 10% Niacinamide.
Choose Beta Glucan Power Moisture Serum if
- Your main concern is Dehydration or Barrier.
- You have Dry or Sensitive skin.
- You want Beta Glucan, Panthenol in the formula.
- You prefer the lower price (from €22.00 vs from €25.00).
Choose No.5 Vitamin-Niacinamide Concentrated Serum if
- Your main concern is Dull or Hyperpigmentation.
- You have Normal or Combination skin.
- You want Niacinamide, Vitamin C Derivative in the formula.
- Strong brightening combo
At a glance
- Dry
- Sensitive
- All
- Normal
- Combination
- Oily
- Dull
- Dehydration
- Barrier
- Redness
- Dull
- Hyperpigmentation
- Uneven Tone
- Beta Glucan
- Panthenol
- Niacinamide
- Vitamin C Derivative
- Plumping
- Calming
- Strong brightening combo
- Lightweight finish
- Layers well
- Slightly tacky
- 10% niacinamide may flush sensitive skin
- Slight tackiness
Ingredient interactions
No flagged interactions between the key ingredients in these two products. You can layer them at different routine steps without a known conflict.
What reviewers say
Beta Glucan Power Moisture Serum
best minimalistic hydrating serum ever
"This is the best minimalistic hydrating serum ever, I have repurchased 5 bottles already and am planning on repurchasing it forever. I have sensitive eczema, barrier damaged skin and this feels calms down my skin so good when paired with ectoin serum from bell…"
"Customers find this serum effective and moisturizing, particularly for dry and sensitive skin. They appreciate its silky, non-greasy feel, quick absorption without leaving a sticky residue, and consider it worth the money."
No.5 Vitamin-Niacinamide Concentrated Serum
numbuzin_official: Best seller - Amazon.com
"Quick look numbuzin No.9 NAD+ Retinal Eye Cream for Anti-Aging, Keratosis Pilaris, Strawberry Skin, Firmer Skin with Retinoid, Peptides & Niacinamide, Gentle Retinal, Multi-Use Eye Cream, 0.67 fl."
numbuzin_official: Best seller - Amazon.com
"Quick look numbuzin No.9 NAD+ Salmon PDRN Toner, Glass Skin Hydrating Toner with Peptides & Niacinamide, Instant Plumping, Firming & Anti-Aging Korean Skincare, 5.07 fl oz 4.6 4.6 out of 5 stars 1,8434.6 out of 5 stars."
FAQ
What is the main difference between iUNIK Beta Glucan Power Moisture Serum and numbuzin No.5 Vitamin-Niacinamide Concentrated Serum?
Both are serums. iUNIK Beta Glucan Power Moisture Serum focuses on Dehydration and Barrier, while numbuzin No.5 Vitamin-Niacinamide Concentrated Serum targets Dull and Hyperpigmentation. Ingredient wise, iUNIK Beta Glucan Power Moisture Serum leads with Beta Glucan and Panthenol; numbuzin No.5 Vitamin-Niacinamide Concentrated Serum uses Niacinamide and Vitamin C Derivative.
Can I use iUNIK Beta Glucan Power Moisture Serum and numbuzin No.5 Vitamin-Niacinamide Concentrated Serum together?
They serve the same routine step, so pick one at a time rather than layering.
Which one is cheaper, iUNIK Beta Glucan Power Moisture Serum or numbuzin No.5 Vitamin-Niacinamide Concentrated Serum?
iUNIK Beta Glucan Power Moisture Serum is the more affordable option based on current listed prices (from €22.00 vs from €25.00).