Beauty
Bone Health
Brain Health
Energy
Eye Health
Gut Health
Hair
Hormonal Health
Heart Health
Immunity
Joints
Menopause
Pregnancy
Kids
Sleep
Stress & Mood
4.4 out of 5
1,100+ verified reviews
THE SCIENCE OF COLLAGEN COMPLEX
Before You Cancel,
See What You're Cancelling.
Collagen Complex isn't just 1,100mg of marine collagen with a nice label on it. It's Peptan® F 2000 HD, a named collagen peptide with published, placebo-controlled human trials behind it, built into a formula with the nine other actives your skin needs to put it to work.
Below is every piece of evidence behind it, including how long it takes. That last part is where most people give up.
4.4★ from 1,100+ verified reviews · 10 actives · Two capsules a day · Made in the UK
As featured in
the science
Collagen Complex Is Built On Ingredients You Can Check
Every one of our 10 actives is on the label at a dose you can read for yourself. The collagen is named: Peptan® F 2000 HD, hydrolysed to an average of around 2,000 daltons so your body can actually absorb it, at a minimum 90% protein to specification.
Every vitamin and mineral benefit we state is an authorised GB and EU nutrient claim at a dose that meets the legal conditions for making it. And where an ingredient carries no authorised claim, which is true of collagen itself, we say so on this page instead of hoping you don't ask.
Nothing on this page is here to impress you. It's here so you can decide whether to give it the time the research says it needs.
See the evidence
one formula
10 Actives.
Eight Areas Of Support.
Most collagen supplements are one ingredient in a big tub. Collagen Complex pairs 1,100mg of hydrolysed marine collagen peptides with hyaluronic acid, aloe vera and seven vitamins and minerals, each at a dose that meets the legal conditions for the benefit we state. Skin is built from more than collagen, so we formulated for more than collagen.
supports:
Skin
Hair
Nails
Bones
Energy
Immunity
Cell Protection
Joints & Cartilage
one formula
10 Actives. Eight Areas Of Support.
Most collagen supplements are one ingredient in a big tub. Collagen Complex pairs 1,100mg of hydrolysed marine collagen peptides with hyaluronic acid, aloe vera and seven vitamins and minerals, each at a dose that meets the legal conditions for the benefit we state. Skin is built from more than collagen, so we formulated for more than collagen.
Targets support for:
Skin
Hair
Nails
Cell Protection
Joints & Cartilage
Bones
Energy
Immunity
How we know what we know
Our Evidence, Layer By Layer
Not all evidence is equal, so we don't pretend it is. Here's every layer behind Collagen Complex, what it actually shows, and, honestly, what we haven't done yet.
1
Clinical Research On Our Collagen
Peptan® F collagen peptides have been through randomised, double-blind, placebo-controlled human trials measuring skin moisture and the structure of the dermal collagen network. We didn't run them, we don't hide who did, and we tell you the dose they used.
Peer-reviewed
Read the studies ↓
2
Authorised Nutrient Claims
Every vitamin and mineral benefit on this page is an authorised GB and EU nutrient function claim, at a dose that meets the conditions of use. No grey areas, no wishful wording, all of it publicly checkable.
GB / EU register
See the claims ↓
3
Real-World Evidence
1,100+ verified customer reviews, read and coded by theme, so you can see what people bring up most, unprompted, rather than the five quotes we'd have chosen ourselves.
1,100+ reviews
See the data ↓
4
Finished-Product Clinical Trial
The gold standard, and the one layer we haven't reached. A placebo-controlled trial on the complete formula is a serious undertaking for a family business. It's on our roadmap, not on this page, and we won't imply otherwise.
On our roadmap
What's next ↓
We'll always tell you what we've measured and what we haven't. Transparency is the whole point of this page.
one formula
Collagen Is The Headline.
The Rest Is Why It Works.
Your body can't build collagen from collagen alone. It needs vitamin C to form it, zinc and selenium to maintain the skin, hair and nails it becomes, and vitamin E to protect those cells while it happens. That's the formula. Ten actives, seven of them carrying authorised claims at legally compliant doses, chosen to give the collagen something to work with.
Skin
Vitamin C contributes to normal collagen formation for the normal function of skin. Zinc contributes to the maintenance of normal skin. Skin comes up in 77% of positive reviews that describe a result.
Hair
Zinc and selenium contribute to the maintenance of normal hair, both at 30% NRV.
Nails
Zinc and selenium contribute to the maintenance of normal nails. Nails and hair are usually the second change customers report, because they grow on a visible timetable.
Cell Protection
Vitamin E plus vitamin C, zinc and selenium contribute to the protection of cells from oxidative stress. Vitamin C also helps regenerate the reduced form of vitamin E, so the two work as a pair.
Joints & Cartilage
Vitamin C contributes to normal collagen formation for the normal function of cartilage.
Bones
Vitamin C contributes to normal collagen formation for the normal function of bones. Vitamin D3 and zinc contribute to the maintenance of normal bones.
Energy
Vitamin C, B6 and B12 contribute to the reduction of tiredness and fatigue.
Immunity
Vitamin C, vitamin D3, B6, B12, zinc and selenium contribute to the normal function of the immune system.
Skin
Vitamin C contributes to normal collagen formation for the normal function of skin. Zinc contributes to the maintenance of normal skin. Skin comes up in 77% of positive reviews that describe a result.
Hair
Zinc and selenium contribute to the maintenance of normal hair, both at 30% NRV.
Nails
Zinc and selenium contribute to the maintenance of normal nails. Nails and hair are usually the second change customers report, because they grow on a visible timetable.
Cell Protection
Vitamin E plus vitamin C, zinc and selenium contribute to the protection of cells from oxidative stress. Vitamin C also helps regenerate the reduced form of vitamin E, so the two work as a pair.
Joints & cartilage
Vitamin C contributes to normal collagen formation for the normal function of cartilage.
Bones
Vitamin C contributes to normal collagen formation for the normal function of bones. Vitamin D3 and zinc contribute to the maintenance of normal bones.
Energy
Vitamin C, B6 and B12 contribute to the reduction of tiredness and fatigue.
Immunity
Vitamin C, vitamin D3, B6, B12, zinc and selenium contribute to the normal function of the immune system.
Our findings
What 1,100+ Customers
Actually Mention
We don't have to guess how Collagen Complex performs in real life. We read every verified review and coded it by theme, so you can see what people bring up most without being asked. If you're wondering whether anyone actually notices anything, this is the honest answer.
4.4
Average across 1,100+ verified customer reviews, collected via Okendo.
WHY THIS MATTERS
Skin is the reason most people start taking collagen, and it comes up in 77% of the positive reviews that describe a result. Hair and nails follow close behind. Read the reviews in date order and a pattern appears: the people describing the biggest changes are almost always the ones several months in.
Of positive reviews that describe a result, the share mentioning each theme
Skin condition, tone & texture
77%
Hair thickness, growth & condition
45%
Nails stronger & faster growing
40%
Hydration & glow
15%
Firmer, plumper skin
11%
Joint comfort
10%
Themes coded from verified Okendo reviews of Collagen Complex. Percentages show the share of positive reviews describing a change in skin, hair, nails or joints that mention each theme. Reviews about delivery only, or written before there was anything to report, are read but not counted in these figures. These are self-reported customer experiences, not clinical outcomes, and individual results vary.
OUR METHOD
We Read Every Review.
Not Just The Good Ones.
The percentages above only mean something if you know how we got them. So: we didn't sample, we didn't pick, and we didn't leave anything out. Every verified review of Collagen Complex was read and coded by theme, including the critical ones. Reviews that only mention delivery, or were written before there was anything to report, are read but not counted in the theme figures, because they can’t tell you whether it worked.
Here's the working.
1,100+
verified reviews read, not sampled
6
themes coded across every review
0
reviews filtered out before coding
Okendo
independently collected and verified
"I've only been taking this for nearly five weeks. There's one thing I can say, and that is I'm sorry I never started taking it sooner. I can notice the change in the firmness of my face. It's giving me a bit more confidence in myself."
Antonia, 50 · Perimenopausal, no HRT · Pilot participant
Debbie F.
Verified Customer
Themes coded from verified Okendo reviews of Collagen Complex. Customer reviews describe individual experience and are not clinical evidence. No supplement works identically for everyone and individual results vary.
The research behind our collagen
Published.
Peer-Reviewed.
Not Funded By Us.
Published. Peer-Reviewed.
Not Funded By Us.
These are the human trials behind the collagen peptide we buy. They were published in full in the Journal of Cosmetic Dermatology in 2015, and each card tells you the dose used, because you deserve to weigh that yourself. Two trials, one paper. We've split them into three cards because they measured three different things: skin moisture, collagen density, and the structure of the collagen network. Read the note under the cards before you read the numbers.
Journal of Cosmetic
Dermatology · 2015
Skin moisture, 8 weeks
In a randomised, double-blind, placebo-controlled trial, 33 women aged 40 to 59 were randomised between placebo and 10g a day of Peptan® collagen peptides for eight weeks, with skin moisture measured by corneometer. The Peptan® F group recorded a 12% increase in skin moisture against baseline. The placebo group did not.
+12% skin moisture
8 weeks · 10g/day
Asserin et al. · Randomised, double-blind, placebo-controlled · n=33
Read the study →
Journal of Cosmetic
Dermatology · 2015
Dermal collagen density,
12 weeks
A second randomised, double-blind, placebo-controlled trial followed 106 women aged 40 to 65 in France, split between placebo and Peptan® F at 10g a day for 12 weeks. Using high-frequency ultrasound, researchers measured an 8.83% increase in dermal collagen density in the collagen group, against essentially no change on placebo.
+8.83% dermal collagen density
12 weeks · P = 0.007
Asserin et al. · Randomised, double-blind, placebo-controlled · n=106
Read the study →
Journal of Cosmetic
Dermatology · 2015
Collagen network structure,
12 weeks
The same trial looked past density at the structure of the collagen network itself, using reflectance confocal microscopy. Fragmentation of the dermal collagen network fell 17.8% at four weeks and 31.2% at twelve weeks against baseline. Note the direction of travel: the twelve-week result is about 1.75 times the four-week one. The effect built rather than arrived.
4 weeks
↓17.8%
12 weeks
↓31.2%
Asserin et al. · Reflectance confocal microscopy sub-analysis
Read the study →
GB / EU nutrition and health claims register
The vitamins & minerals
Every stated role of vitamin C, vitamin E, vitamin D3, B6, B12, zinc and selenium on this page is an authorised nutrient function claim under GB and EU regulation, made at a dose that meets the conditions of use. You can look up every single one.
View the register →
Three things we won't leave out
Those trials used 10g of collagen peptides on their own. Two capsules of Collagen Complex give you 1,100mg alongside nine other actives, and we're not going to pretend a capsule reproduces a 10g powder trial, because the arithmetic doesn't work and you'd be right not to trust us if we did. What the research tells you is which collagen we buy, and that it's a material with real human data behind it rather than an anonymous powder. What it also tells you is that the effect builds with every week of consistent intake, with the biggest results at the end, which is exactly why stopping is the one decision the research argues against. And the 2015 trials were run with involvement from Rousselot, who make Peptan®. That's standard for ingredient research and it's also a limitation, so we'd rather point it out than let you find it in the author affiliations.
Clean without compromise
Everything You Need. Nothing You Don't.
Ten actives only count if your body can use them, and if nothing else in the capsule works against you. Collagen Complex is made in the UK to GMP standards, from Friend of the Sea certified marine collagen, without the fillers people so often react to. And because it's a capsule rather than a powder, 16% of positive reviews mention, unprompted, that there's nothing to mix and no fishy aftertaste.
✕
Titanium dioxide
✕
Maltodextrin
✕
Magnesium stearate
✕
Palm oil
✕
Synthetic silicon dioxide
✕
Synthetic colours & preservatives
Instead: a natural vegetable HPMC capsule, brown rice flour as a carrier, rice extract blend as a natural flow agent and bamboo silica as a natural anti-caking agent. Pescatarian-friendly, non-GMO, gluten-, wheat- and dairy-free, no added sugars. Contains fish. Made in the UK, batch tested for identity, dose and purity before release.
THE PERSON BEHIND THE FORMULA
The people behind the formula
A Named Expert, Real Accountability
Stephanie Baker
Registered Associate Nutritionist (ANutr), mBANT
Women's Health & Nutrition Specialist
Stephanie supports our evidence-led approach to formulation, reviewing ingredient selection, nutritional rationale and the research behind our products. Her input is why every active in Collagen Complex has a stated purpose at a stated dose, and why the claims on this page are held to the authorised register rather than to whatever sounds best.
IN THE PRESS
Trusted By The Press
"If you're constantly on the move, Purolabs marine collagen complex peptides are for you."
2023
"Our tester noticed her hair and nails were growing much quicker."
2024
"This hydrolysed collagen peptide formula helps to keep joints supple for smoother running."
2024
"A convenient and budget-friendly choice for those looking to support their skin's health."
2024
"Nourish your body from the inside out with Purolabs Collagen Complex - a premium blend."
2024
"These easy-to-swallow capsules are packed with all the ingredients for luminous skin."
2026
"If you're constantly on the move, Purolabs marine collagen complex peptides are for you."
2023
"Our tester noticed her hair and nails were growing much quicker."
2024
"This hydrolysed collagen peptide formula helps to keep joints supple for smoother running."
2024
"A convenient and budget-friendly choice for those looking to support their skin's health."
2024
"Nourish your body from the inside out with Purolabs Collagen Complex - a premium blend."
2024
"These easy-to-swallow capsules are packed with all the ingredients for luminous skin."
2026
Where our research goes next
We're Not Finished,
And We'll Say So
We're Not Finished, And We'll Say So
Clinical research is rare in the supplement industry because it's slow and expensive. We're a family business, not a venture-backed giant, so we're building our evidence base in honest, deliberate steps, and each one gets published here as it lands. Including the ones that take a while.
Review-theme analysis
1,100+ verified reviews read and coded by theme
Complete
Named, specified collagen peptide
Peptan® F 2000 HD rather than a generic marine collagen, so the ingredient in the capsule is the one in the published research
Complete
Structured 12-week consumer study
Self-scored skin, hair and nail measures on one consistent scale, before and after, analysed independently
Next
Finished-product clinical trial
A placebo-controlled study of the complete Collagen Complex formula as we grow
Ambition
BEFORE YOU GO
Don't Quit Right Before It Works
Collagen Complex
(60 capsules 30-day supply)
£0.93/day
£27.99
Look at the timeline in the research above. Skin moisture moved at eight weeks. Collagen network fragmentation improved 17.8% at four weeks and 31.2% by twelve weeks. The effect at week twelve was 1.75 times the effect at week four, which tells you it builds rather than arrives. Our reviews say the same thing: skin texture and hydration around weeks 2 to 3, hair and nails by week 5, firmness from month 3. Skin renews on its own timetable and nothing changes that.
So the question isn't whether the research is real. It's whether you've given it long enough to tell. Every week you've already taken it is banked, and cancelling now throws those weeks away. Stop today and you may be walking away at the exact moment it's working hardest.
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Flexible
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60-Day Money-Back Guarantee
If it genuinely isn't working, we refund you. No quibbles, no forms.
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Good to know
Questions Customers Ask Us
Not yet, and here's why.
The published trials on our collagen peptide ran for eight and twelve weeks, and the interesting part is what happened between week four and week twelve. Collagen network fragmentation improved 17.8% at four weeks and 31.2% at twelve, about 1.75 times the four-week result. If those researchers had stopped at week four they'd have reported a much smaller effect.
Our reviews follow the same shape. Skin texture and hydration tend to come up around weeks 2 to 3, hair and nails around week 5, and firmness from month 3 onwards. Read them in date order and the people describing the biggest changes are nearly always the ones furthest in.
The most common reason people conclude collagen didn't work for them is that they judged it at week four. Stopping now means starting from zero if you come back, and with the 60-day guarantee there's no financial risk in staying the course.
The fairest question you can ask us, so here's a straight answer.
The trials used 10g a day of collagen peptides on their own. We're not claiming a capsule reproduces that, and you should be sceptical of any capsule brand that implies it does.
We built the formula on a different bet. A 10g powder is only worth 10g on the days you actually drink it, and adherence in this category is dreadful, because powders mean a shaker, a spoon, a fishy aftertaste and a decision every single morning. Two capsules is a two-second habit you'll still be keeping in month six, and consistency over months is exactly what the research timeline shows matters.
And rather than spend the whole capsule on collagen, we spent part of it on what your body needs to use collagen. Vitamin C contributes to normal collagen formation, and without enough of it the raw material has nowhere to go. Zinc and selenium contribute to the maintenance of normal skin, hair and nails. Vitamin E, at 300% NRV, contributes to the protection of cells from oxidative stress. That's a formula, not a single-ingredient tub, and it's why every benefit on this page is an authorised claim rather than a hopeful one.
If you want the full studied gram load, take a powder. If you want something you'll take every day without thinking about it, that's this.
Three things, and all three are checkable.
A named collagen. Peptan® F 2000 HD from Rousselot, hydrolysed to an average of around 2,000 daltons and at least 90% protein to specification. Most brands won't tell you whose collagen is in the tub, because it tends to be whoever was cheapest that quarter. Hydrolysis matters: whole collagen is far too large to absorb, and research on collagen peptides has found them in the bloodstream within about an hour of a dose.
Nine actives around it. Vitamin C, vitamin E, vitamin D3, vitamin B6, vitamin B12, zinc and selenium, plus hyaluronic acid and a 200:1 aloe vera extract. The seven vitamins and minerals carry authorised claims at compliant doses.
A clean capsule. No titanium dioxide, no magnesium stearate, no maltodextrin, no palm oil, no synthetic colours. Made in the UK to GMP standards and batch tested before release.
Peptan® F collagen peptides have been through randomised, double-blind, placebo-controlled human trials. Over eight weeks, skin moisture rose 12% in the collagen group and not on placebo. Over twelve weeks, dermal collagen density rose 8.83% against essentially no change on placebo, and fragmentation of the dermal collagen network fell 31.2%. The paper is linked in full above so you can read it rather than take our word for it.
Two caveats we'd rather say out loud: those trials used 10g a day, and the ingredient manufacturer was involved in the 2015 research. Marine collagen also carries no authorised health claim in Great Britain or the EU, so nothing above is a promise about what Collagen Complex will do for you. What it is, is the reason we chose this collagen over a cheaper one.
Every batch is made in the UK to GMP standards, the same framework used in pharmaceutical manufacturing, and tested for identity, dose accuracy and purity before release. Our marine collagen is Friend of the Sea certified for responsible sourcing, and the Peptan® range is Upcycled Certified®.
We also refuse the additives most brands rely on, we publish the full dose of every active, and we tell you what we haven't proven as readily as what we have. Collagen Complex contains fish, so it isn't suitable for anyone with a fish allergy and isn't vegan, though it is pescatarian-friendly. It isn't recommended for children or during pregnancy or breastfeeding. If you take medication or are under medical supervision, check with your GP or pharmacist first.
Proven. Clean. Honest.
Don't Throw Away
What You've Built.
Every capsule you've taken so far is working towards the next result.
Cancel today and you start again from nothing.
Every capsule you've taken so far
is working towards the next result.
Cancel today and you start
again from nothing.
Peptan® F 2000 HD marine collagen
1,100+ verified reviews
10 actives, two clean capsules
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