Liquid Peptides — Reddit Reviews
by Medik8
Updated October 22, 2026
Multi-peptide serum visibly plumps skin; pricey, benefits fade quickly.
What the community says
A cosmetically elegant, water-based peptide serum with sodium hyaluronate, glycerin, and multiple signaling peptides. It makes the most sense for mature or tretinoin-treated skin chasing a temporary plumped look, though acne-prone and oily users may find it heavy.
What this means for you
Backed by 30 threads from r/30PlusSkinCare, r/SkincareAddiction and 5 more.
Read the threads ↓What people love
- Dense multi-peptide blend
- Visible plumping and smile-line improvement
- Works in sensitive and rosacea routines
Watch out for
Product details
Skin Type
Product Traits
Key Ingredients
Where to buy
What the science says vs. what Reddit says
Anti-Aging
Not proven yet
Few or mixed studies. This claim isn't established.
Peptides: 2 studies tested it on its own. See all 6 studies
On Reddit: Between-boob chest wrinkles show a noticeable difference, but it fades quickly after a night or two off. 9 mentions
What the studies found
- Both studies that tested peptides on their own found they helped with signs of aging
- Peptides improved skin firmness in both studies
- One study found smoother skin and better hydration with peptides
- Wrinkles improved in one study, but changed little in another
- No stinging or itching was reported in one study
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
Real Reddit threads — 39 mentions across 30 threads
Medik8 Liquid Peptides on Reddit, in one place — 30 threads from r/30PlusSkinCare, r/SkincareAddiction and 5 more, summarized.
“Since then, I added the following to my routine: -medik8 advanced mp liquid peptides”
Positive
“Crazy,I have .1 tret. Medik8 peptides and have had the alastin in my cart for a while”
Positive
“Seeing improvement in smile lines after 6 months”
Positive
“The Geek & Gorgeous peptide serum is really good and compares well to medik8 liquid peptides.”
Mentioned
“Any substitute for The Ordinary's Multi-Peptide Copper Serum?”
Mentioned
“I've been using Maelove Peptide Squad with copper”
Mentioned
“I've also been using the stupidly expensive Medik8 liquid peptides more recently”
Positive
“it seems to be making a noticeable difference in my between-boob chest wrinkles.”
Positive
“if I skip a night or two, it reverts quickly”
Positive
“I’ve been using medik8 Bakuchiol and their multi peptide serum”
Positive
“I’m halfway through both bottles and my skin is looking better than it has in awhile.”
Positive
“I have extremely sensitive skin and found that the only things that work for my skin are: ... Medik8 liquid peptides”
Positive
“it improved my skin tenfold.”
Positive
“the only things that work for my skin are”
Positive
“Medicube pink peptides serum, not a patch on my medik8 liquid peptides”
Mentioned
“my medik8 liquid peptides (which is too expensive)”
Mentioned
“not a patch on my medik8 liquid peptides”
Mentioned
