When should you apply a peptide serum?

In the evening after cleansing, on slightly damp skin, before moisturiser and oil. Two to three drops are enough.

Peptide serum before or after moisturiser?

Always before. Peptides are water soluble and need direct skin contact; a cream underneath blocks absorption.

How many drops of peptide serum per application?

Two to three drops for the whole face. More product does not improve the outcome.

How long does a peptide serum take to work?

Texture and hydration improve in about 14 days; visibly flatter wrinkles take 8 to 12 weeks.

Can you use a peptide serum and retinol together?

Yes. Peptide serum on damp skin first, wait ten minutes, then retinol. On sensitive skin use them on separate nights.

Should a peptide serum be used morning or night?

At night. Skin regenerates most during sleep and the serum does not compete with sunscreen or make-up.

How should a copper peptide serum be stored?

Cool, dark and tightly closed; use within six months of opening. The slight turquoise tint comes from the copper.

RoutineAugust 6, 20269 min readBy Marco Buchegger

How to use a peptide serum: order matters most

The best serum does nothing in the wrong step of a routine. Here is the order, in 60 seconds.

Evening routine with serum, cream and linen cloth – how to apply a peptide serum

Peptides are water soluble and need direct contact with the stratum corneum. Applied over a cream or oil, almost nothing gets through. So in every routine the rule is: thin to thick.

The evening order

Two drops of peptide serum applied to cleansed skin in the evening — Two to three drops on slightly damp skin — before moisturiser and oil.

Total time: approx. 6 minutes

How to apply a peptide serum at night

Cleanseapprox. 2 min
Remove sebum, make-up and sunscreen with a mild cleanser.
Optional: tonerapprox. 1 min
Apply toner and leave the skin slightly damp — it improves uptake.
Apply the peptide serumapprox. 1 min
Press 2–3 drops thinly into face and neck without rubbing.
Wait 60 secondsapprox. 1 min
Let the serum absorb fully before layering anything on top.
Moisturiserapprox. 1 min
Apply moisturiser on top — it seals the serum and supports the barrier.

Morning or evening?

Evening. Skin regeneration peaks at night, and during the day the serum competes with sunscreen and make-up. If you want an active in the morning, use vitamin C — and leave peptides to the night.

What peptides can be combined with

Peptide serum, moisturiser and retinol side by side for layering — Layer thin to thick: serum first, retinol alternated on separate evenings.

Ingredient	With peptides?	How to do it
Hyaluronic acid	Yes, ideal	Right before the serum, on damp skin.
Niacinamide	Yes	Before or after the peptide serum, both work.
Retinol	Yes, staggered	Peptides first, wait 10 minutes, then retinol — or on separate nights.
Vitamin C (high dose)	Separate by time	Vitamin C in the morning, peptides at night.
AHA/BHA acids	Not in the same step	Alternate acid nights and peptide nights.
Sunscreen	Yes	Mornings over moisturiser — it protects the results.

Peptide serum and retinol on the same night

This works when the barrier is stable: peptide serum on damp skin first, wait ten minutes, then a pea-sized amount of retinol, moisturiser on top. If skin feels tight or looks red, alternate instead: retinol on Monday, Wednesday, Friday — peptides only on the other nights.

How to use it by skin type

Dry skin: apply to noticeably damp skin, then a richer moisturiser.
Oily or combination skin: serum neat, only a light gel cream on top.
Sensitive skin: every other night for the first week, then daily.
Mature skin 45+: treat neck and décolleté too — that is where the difference shows most.
Blemish-prone skin: peptides do not irritate — just keep acid nights separate.

Storage and shelf life

Serum bottle stored cool and dark, away from sunlight — Store cool and dark, and use within 6 months of opening.

Copper peptides are sensitive to light and air. Keep the bottle closed, cool and dark — not on a windowsill and not in a steamy bathroom. Use within six months of opening; a slight blue-turquoise tint is the copper, not a fault.

The five most common mistakes

Too much product: more than three drops does not absorb better.
Applying to dry, freshly exfoliated skin: let the barrier settle first.
High-dose vitamin C straight on top: separate by time of day.
Giving up after ten days: structure only changes from week 8.
Irregular use: peptides work through signal consistency, not dose.

The realistic timeline

Day 1–14: smoother texture, better water binding. Week 4–8: more elasticity, more even tone. From week 8: visibly flatter lines. The LIORA GHK-Cu Korean Gold Serum is built for exactly this nightly routine.

See the GHK-Cu serum

Frequently asked questions

When should you apply a peptide serum?: In the evening after cleansing, on slightly damp skin, before moisturiser and oil. Two to three drops are enough.
Peptide serum before or after moisturiser?: Always before. Peptides are water soluble and need direct skin contact; a cream underneath blocks absorption.
How many drops of peptide serum per application?: Two to three drops for the whole face. More product does not improve the outcome.
How long does a peptide serum take to work?: Texture and hydration improve in about 14 days; visibly flatter wrinkles take 8 to 12 weeks.
Can you use a peptide serum and retinol together?: Yes. Peptide serum on damp skin first, wait ten minutes, then retinol. On sensitive skin use them on separate nights.
Should a peptide serum be used morning or night?: At night. Skin regenerates most during sleep and the serum does not compete with sunscreen or make-up.
How should a copper peptide serum be stored?: Cool, dark and tightly closed; use within six months of opening. The slight turquoise tint comes from the copper.

Topics

Routine
How to use
Peptides
Layering
Retinol
Storage

Keep reading

EDNF25070922 combines GHK-Cu, bio microneedling, the 5-peptide complex and 24K gold in a single serum.

View the serum

Back to the blog