SkinCeuticals Peptide Serum.

Serums

About this product

A lightweight serum formulated with peptides designed to support skin firmness and resilience.

Full ingredients

Aqua/Water/Eau, Niacinamide, Gluconolactone, Butylene Glycol, PEG/PPG/Polybutylene Glycol-8/5/3 Glycerin, Alcohol Denat, Pentylene Glycol, Methyl Gluceth-20, Glycerin, Potassium Hydroxide, Hydroxyethylcellulose, Salicylic Acid, Chlorphenesin, Phytic Acid, Adenosine, Sodium Benzoate, Laminaria Digitata Extract, Dipeptide Diaminobutyroyl Benzylamide Diacetate, Acetyl Hexapeptide-8

Guru Score

68%

Mixed

Early verdict · Few reviews so far

What they liked

Holy grail status for some

What they flagged

Low pH may trigger irritation and redness
Can cause acne lesions in sensitive skin

What the gurus are saying

This peptide serum earns praise as a holy grail for some, though irritation remains a real concern for others. Doctorly found it triggers redness and acne-like lesions, pointing to its low pH as the likely culprit. Anyone with sensitive skin or a history of irritation may want to patch-test first, or skip it altogether if your skin leans reactive.

Synthesized from 2 expert reviews · most recent take March 2026

Best for

Mature skin

Type

SerumsDrops & dropper

Key actives

Niacinamide Salicylic acid (BHA)Peptides

Formula notes

Fragrance-freeContains drying alcohol

Where to buy

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What the gurus are saying.

Every take we've logged from this product's reviews across YouTube. Click any row to watch the moment they said it.

All takes Yay takes Nay takes Mixed takes Hide sponsored

Allie Glines

829k subs

~Yay

"I did the SkinCeuticals Peptide Serum, which is one of my holy grails."

Doctorly

3.59M subs

~Nay

"I personally get very irritated from this product. [...] I always get like irritation, redness, and even sometimes acne like lesions. It's a low pH so I don't know what the issue is it's causing this."

What the evidence says.

Independent of what the gurus think, this is what the published research supports about the main active ingredients here.

Niacinamide

Niacinamide has evidence behind it for redness, uneven tone and supporting the skin barrier, and it is usually well tolerated even by skin that reacts to most things.

Source: DermNet

Salicylic acid

Salicylic acid dissolves in oil, so it can get into a pore rather than just working on the surface. That is why it has long-standing evidence for blackheads and milder acne.

Source: DermNet

Peptides

Peptides are short protein fragments meant to signal repair. The evidence for them is thinner than for retinoids or vitamin C, and it varies a lot by the specific peptide, so the category is more promising than proven.

Source: NIH, National Library of Medicine

Frequently asked.

What is SkinCeuticals Peptide Serum?

A lightweight serum formulated with peptides designed to support skin firmness and resilience.

Is SkinCeuticals Peptide Serum worth it?

The gurus mostly approve it, but with enough reservations to keep it in the middle at a Guru Score of 68%.

What is SkinCeuticals Peptide Serum's Guru Score?

SkinCeuticals Peptide Serum holds a Guru Score of 68%. That is our read on how warmly the experts talk about it, based on the verdicts of 2 expert reviewers we have collected.