Medik8 Liquid Peptides Review: My Honest Experience With This Peptide Serum
Medik8 Liquid Peptides is often recommended as a gentle anti-ageing serum for early fine lines and dehydration. I added it into my routine for several weeks to see how it actually performs in real life.
This is my honest, unsponsored review of Medik8 Liquid Peptides, covering the ingredients, how it felt on my skin, visible results and whether I think it is worth buying.
I bought this product myself, it was not gifted.
What Is Medik8 Liquid Peptides?
Medik8 Liquid Peptides is a lightweight peptide serum designed to support collagen, improve skin smoothness and maintain hydration. Rather than relying on exfoliating acids or retinoids, it focuses on peptides that work gradually to improve skin quality over time.
Peptides are some of the most effective ingredients for improving skin texture and resilience, and Medik8 takes this to the next level.
This serum doesn’t just contain one or two peptides, but 10 highly concentrated peptides to maximise results.
It also uses advanced drone-targeted delivery technology to ensure the active ingredients reach the areas of your skin where they’re needed most. This means every drop works harder to deliver visible improvements.
You can apply this serum in the morning and evening and it’s completely compatible with Medik8 Crystal Retinal.
What Are the Key Ingredients in Medik8 Liquid Peptides?
Medik8 Liquid Peptides contains an impressive 30% concentration of 10 powerful peptides that work together to smooth, firm and strengthen the skin over time.
Here’s a breakdown of the key peptides inside the formula:
Matrixyl 3000: Boosts collagen production to help improve firmness and create a plumper-looking complexion.
Copper Peptides: Support skin regeneration and repair while improving elasticity, helping skin look healthier over time.
Expression Line Peptides: Help relax facial tension, which can soften the appearance of expression lines caused by repetitive facial movements.
Carnosine: Protects against glycation, a process that damages collagen and accelerates visible signs of ageing.
The formula also includes hyaluronic acid to deeply hydrate and leave your skin looking plump and refreshed.
Why I Wanted to Try It
I wanted a peptide serum that would improve my skin’s overall condition without disrupting my existing routine. At the time, my main concerns were dehydration and early fine lines rather than deep wrinkles.
Liquid Peptides appealed to me because it could be used consistently without causing redness, stinging or sensitivity.
My Experience Using Medik8 Liquid Peptides
Texture and Usage
Here’s why I’ve been so impressed with this serum:
Silky, fast-absorbing texture: It feels lightweight and smooth and sinks in beautifully without leaving residue. I love taking a moment to massage it in, as it encourages circulation and boosts absorption.
Powerful multi-tasking formula: I’m now all about using fewer but more effective products. This serum tackles multiple signs of ageing in one step which makes it a staple in my routine. My skin already looks smoother and feels more resilient.
Compatible with the rest of my skincare: It layers well with other serums like Crystal Retinal, so I didn’t have to overhaul my routine to fit it in. It simply works alongside the products I already love.
Results Over Time
After a few weeks of daily use, my skin felt more hydrated and looked smoother overall. Dehydration lines were less noticeable, particularly around my mouth and forehead.
To me, taking care of my skin is all about results in the long run. I don’t expect miracles, but I want to have confidence in a skincare formulation to deliver subtle, yet tangible results overtime.
This is why I trust Medik8 for my skin, and why this serum is a keeper to improve skin texture and hydration with regular use.
Who Medik8 Liquid Peptides Is Best For
Based on my experience, this serum is best suited to:
Early signs of ageing
Fine lines caused by dehydration
Sensitive or reactive skin
People new to peptide serums
Anyone looking for a preventative anti-ageing product
If your main concern is deeper expression lines, Liquid Peptides Advanced MP may be best suited (2026 edit: this is the serum I’ve now upgraded to).
Can’t decide between the two? I have written a separate Liquid Peptides vs Liquid Peptides Advanced MP comparison, where I explain the differences, who each serum is best for, and which one makes the most sense depending on your skin goals.
Where to Buy Medik8 Liquid Peptides Online
You can order Medik8 Liquid Peptides directly from the Medik8 website, as well as from several trusted beauty e-retailers including Cult Beauty and Sephora.
The recommended retail price is £55, although discounts are available from time to time with up to 20% off.
Is Medik8 Liquid Peptides Worth It?
If your goal is smoother, more hydrated skin with a gentle anti-ageing boost, I think Medik8 Liquid Peptides is worth considering. It is especially well suited if you want a peptide serum that fits easily into an existing routine without causing irritation.
If you are looking for faster or more dramatic results, a stronger peptide serum may be a better fit.
Final Thoughts
Medik8 Liquid Peptides is a reliable, well-formulated serum that delivers gradual improvements in hydration and skin smoothness. It is easy to use consistently and works well as part of a long-term skincare routine.
If you are unsure whether this or Liquid Peptides Advanced MP is right for you, I recommend reading my comparison post to help you choose the best option for your skin.
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Is Medik8 Liquid Peptides worth the price?
While it might seem pricey at first, a little really does go a long way. Using just a few drops twice a day, one bottle has lasted me several months.
Given the high concentration of clinically proven peptides, the advanced delivery system and how well it works for me, I consider it a smart investment in my skin.
If you’re looking for a peptide serum that delivers real results and fits seamlessly into your routine, I highly recommend giving Medik8 Liquid Peptides a try.
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