Peptide Skincare - Serums, Moisturisers & Lip Treatments

Peptides are one of skincare's most powerful multi-taskers - short chains of amino acids that signal your skin to produce more collagen, firm fine lines, and lock in lasting hydration. Whether you're looking for a peptide serum for your face, a peptide moisturiser to nourish dry skin, or a plumping lip balm powered by tripeptides, INKEY has you covered. All our peptide skincare is affordable, effective, and safe for sensitive skin - including during pregnancy and breastfeeding.

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4.1
Rated 4.1 out of 5 stars
4.1 Stars (945 Reviews)

Caffeine Eye Cream

Clinically proven to minimise dark circles & puffiness from 1st use

£10.00
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4.5
Rated 4.5 out of 5 stars
4.5 Stars (660 Reviews)

15% Vitamin C + EGF Serum

Brightening serum to target hyperpigmentation and uneven skin tone

£15.00
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4.7
Rated 4.7 out of 5 stars
4.7 Stars (3,122 Reviews)

Hyaluronic Acid Serum - 30ml

Instantly hydrates, plumps & firms skin in a lightweight, non-sticky formula - just £9

£9.00
In your recipe You've bought before

4.7
Rated 4.7 out of 5 stars
4.7 Stars (3,122 Reviews)

Hyaluronic Acid Serum - 60ml

Instantly hydrates, plumps & firms skin in a lightweight, non-sticky formula

£16.00
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4.7
Rated 4.7 out of 5 stars
4.7 Stars (3,122 Reviews)

Supersize Hyaluronic Acid Serum - 100ml

Instantly hydrates, plumps & firms skin in a lightweight, non-sticky formula

£22.00 (Worth £30.00)
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4.1
Rated 4.1 out of 5 stars
4.1 Stars (945 Reviews)

Caffeine Eye Cream Duo

Clinically proven to minimise dark circles & puffiness from 1st use

£19.00 ~~£20.00~~

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4.4
Rated 4.4 out of 5 stars
4.4 Stars (324 Reviews)

Peptide Moisturiser

Helps reduce wrinkles & nourish dry skin

£16.00
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3.8
Rated 3.8 out of 5 stars
3.8 Stars (1,347 Reviews)

Tripeptide Plumping Lip Balm

Clinically proven to plump lips by up to 40% in 4 weeks* - No tingle, no irritation

£11.00
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4.1
Rated 4.1 out of 5 stars
4.1 Stars (341 Reviews)

Tripeptide Plumping Berry Lip Balm

Sheer warm red berry lip tint, clinically proven to plump lips by up to 40% in 4 weeks*

£11.00
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4.2
Rated 4.2 out of 5 stars
4.2 Stars (320 Reviews)

Tripeptide Plumping Mocha Brown Lip Balm

Sheer mocha lip tint, clinically proven to plump lips by up to 40% in 4 weeks*

£11.00
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4.3
Rated 4.3 out of 5 stars
4.3 Stars (271 Reviews)

Tripeptide Plumping Pink Lip Balm

Sheer pink lip tint, clinically proven to plump lips by up to 40% in 4 weeks*

£11.00
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3.8
Rated 3.8 out of 5 stars
3.8 Stars (44 Reviews)

Lip Balm Gift Set

Hydrates, repairs & smooths, leaving lips looking fuller and healthier.

£30.80 ~~£44.00~~
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4.5
Rated 4.5 out of 5 stars
4.5 Stars (52 Reviews)

Eye & Lip Hydration Duo

Plump lips and reduce under-eye puffiness.

£19.95 ~~£21.00~~

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3.8
Rated 3.8 out of 5 stars
3.8 Stars (1,347 Reviews)

Lip Plumping Duo

Clinically proven to plump lips by up to 40% in 4 weeks* - No tingle, no irritation

£20.90 ~~£22.00~~

FAQs

Our askINKEY digital skincare advisors are experts with deep product knowledge, here to answer your most asked questions and make skincare as simple as possible.

Peptides are short chains of amino acids - the building blocks of proteins like collagen and elastin. In skincare, they work as biological messengers, signalling your skin to produce more collagen, repair its barrier, and retain moisture. The result? Firmer, plumper, more resilient skin over time. Unlike some actives that strip or resurface, peptides are gentle and work with your skin, making them suitable for all skin types - including sensitive skin.
Peptides deliver a wide range of skin benefits depending on the type used. They can: boost collagen production to reduce the appearance of fine lines and wrinkles; strengthen the skin barrier to lock in hydration and protect against environmental stressors; plump and firm the skin for a more youthful look; and hydrate deeply by attracting and retaining moisture. At INKEY, we use targeted peptide complexes in our serums, moisturisers, and even our Tripeptide Plumping Lip Balm - clinically proven to plump lips by up to 40% in 4 weeks*
Yes - peptides are considered one of the safest skincare ingredients to use during pregnancy and breastfeeding. Unlike retinol or high-strength acids, peptides are gentle and non-irritating, with no known risks associated with use during this time. In fact, 13 of the peptide products in our collection are specifically suitable for use during pregnancy and breastfeeding. Always check individual product pages for full suitability information, and consult your midwife or GP if you have any concerns.
Peptides aren't an overnight fix - but they do deliver real, measurable results with consistent use. You can typically expect to see initial improvements in hydration and skin texture within 2–4 weeks. For firming and visible reduction in fine lines, most people see meaningful results between 4–12 weeks of daily use. Our Tripeptide Plumping Lip Balm is clinically proven to plump lips by up to 40% in just 4 weeks. Consistency is key - make peptides a permanent part of your routine for best results.
Great news - peptides are one of the most versatile and compatible skincare ingredients out there. They play well with almost everything, including hyaluronic acid, niacinamide, vitamin C, and ceramides. Unlike retinol or strong exfoliants (AHAs/BHAs), peptides won't cause irritation when layered. If you're using both peptides and retinol in your routine, simply use your peptide serum in the morning and retinol at night. Not sure how to build your routine? Try our Skincare Quiz for a personalised recommendation in just 2 minutes.
Collagen molecules are too large to penetrate the skin when applied topically - so collagen creams largely sit on the skin's surface. Peptides, on the other hand, are small enough to be absorbed and work beneath the surface, where they signal your skin to produce its own collagen naturally. Think of peptides as the smarter, more effective route to firmer, bouncier skin. This is why peptide serums and peptide moisturisers are such a powerful part of any anti-ageing routine.