There are loads of products on the market promising to reduce wrinkles. For many of them, it's just unproven hype.
But there's one supplement the research consistently supports for reducing wrinkles — and with the latest findings, the evidence is stronger than ever. A 2023 meta-analysis of 26 randomised controlled trials and four subsequent studies all point in the same direction.
This article examines the evidence surrounding collagen peptides: how effective they are, exactly what happens inside the body when they are taken, how to use them correctly, and what the collagen-versus-protein debate is really about.
Table of Contents
3. Mechanism
5. How to Use
6. References
Aging and Skin
What is collagen, and what does it have to do with wrinkles?
Collagen is the most common protein in the human body — the scaffolding that provides structure in muscles, bones, tendons, and skin. In the skin specifically, collagen forms a network that supports the outer layer, giving it firmness and elasticity [1].
Specialised cells in the skin, called fibroblasts, produce both collagen and elastin — a key component for elasticity. As the body ages, those fibroblasts become less active. Collagen production declines by around 1–1.5% per year from early adulthood, and existing collagen breaks down more quickly. Lifestyle factors like smoking and sun exposure accelerate this process considerably [1].
With less collagen, the skin progressively loses firmness and elasticity — leading to visible wrinkles and sagging. This is why collagen has become one of the most studied targets in skin health research.
Collagen Helps Wrinkles
Since collagen plays such a central role in skin structure, the natural question is: does consuming more collagen actually help? Can the body make use of supplemental collagen to restore or replace the collagen in skin? Here is what the research shows.
Studies of collagen's effects on skin typically involve supplement use. Those supplements usually consist of collagen peptides — chains of amino acids that are the building blocks of proteins. Collagen peptides are what results when collagen proteins are broken into smaller, more bioavailable pieces.
One randomised controlled trial tested the effects of collagen peptides on wrinkles and skin quality. Participants took collagen peptides or a placebo over 12 weeks. Their skin was carefully measured before, during, and after the study period. Researchers found that those taking the collagen peptides had significant improvements in wrinkles, skin roughness, elasticity, and moisture [2].
And this kind of result is not seen in just one or two studies. A meta-analysis in 2023 reviewed 26 randomised controlled trials of collagen peptides. The study authors concluded that the evidence shows collagen supplements significantly improve skin hydration and elasticity [3].
These are two key markers of improved collagen in the skin.
Confidence in collagen's effect on skin condition has grown even further since that 2023 meta-analysis was published. Four additional studies have since reinforced those earlier results — all showing positive effects.
For instance, a study published in February 2024 examined wrinkles, elasticity, and hydration in detail. Researchers measured participants at 4, 8, and 12 weeks. Once again, those taking collagen peptides experienced significant improvements in wrinkle size, elasticity, and hydration [4].
A further study published in November 2024 examined the effects of 5 g daily of collagen peptides. Eighty-five women were assigned to either a placebo group or the peptide group. After approximately 6 months, the supplement group had marked improvements in skin density and moisture [5].
But what counts as a "significant improvement"? How large can the real-world impact of collagen supplementation actually be?
One study took careful measurements of skin wrinkles and thickness using precision tools. After 90 days of collagen peptide supplementation, participants saw wrinkles reduced on their foreheads and around their mouths and eyes by between 14 and 31%. That is a substantial and measurable change [6].
Collagen peptide supplements also appear to support health beyond just skin appearance. Research suggests they may improve sleep quality in men experiencing sleep difficulties, with participants waking up less frequently during the night [7]. A further study suggested that collagen peptides made daily physical activity easier and reduced associated pain [8].
Mechanism
How does collagen supplementation actually work? What happens inside the body when collagen peptides are consumed — and why do collagen peptides behave differently from ordinary protein?
When a supplement containing collagen peptides is swallowed, the peptides are absorbed by the stomach and intestines and enter the bloodstream. As the blood circulates throughout the body, the peptides eventually reach the skin. A study using both mice and humans confirmed this: collagen peptides consumed orally do indeed make their way to the skin [3].
Once there, the peptides signal the fibroblasts in skin to produce more collagen and elastin. They also stimulate the production of substances that help block the breakdown of existing collagen and elastin — rebuilding the structures essential for healthy, firm skin while slowing the loss of what is already there.
There is another important effect related to skin moisture. Collagen peptides also stimulate the production of hyaluronic acid, which has a unique ability to bind and hold water [9]. That is a key mechanism for locking in moisture and maintaining a youthful skin appearance over time.
A question that has generated some debate: collagen peptides are chains of amino acids, and the body can build collagen from amino acids obtained from various protein sources. So couldn't regular dietary protein provide the same benefit? Do collagen peptides offer anything extra beyond standard protein intake?
One intriguing randomised controlled trial from 2020 sheds light on this question. It examined burn patients — one group received supplemental protein, and the other received a matching amount of collagen peptides. The collagen peptide group experienced a significantly higher wound healing rate compared to the protein group. This finding suggests collagen peptides do have biological effects that go beyond regular protein intake [10].
In addition, several studies have shown that when collagen is broken down into peptides through hydrolysis, it is easier for the body to absorb and utilise [11]. The hydrolysis process appears to improve both bioavailability and biological activity.
From the MicroVitamin range
MicroVitamin+ Powder includes 12.5 g of bovine-derived collagen peptides per serving — within the effective dose range shown across published RCTs — alongside 200 mg Hyaluronic Acid, which the mechanism research links to complementary moisture-retention in skin. MicroVitamin+ Powder.
What About Safety?
Are collagen peptides safe?
Collagen peptides are a natural substance — simply parts of the collagen protein found in animal products. They have no known serious adverse effects on health. The FDA, the World Health Organization, and the European Commission for Health and Consumer Protection have all listed collagen peptides as safe [12].
One consideration for certain groups: people with known sensitivities to bovine or marine proteins (depending on the collagen source) should check the product source. Otherwise, collagen peptides have an excellent safety profile across the published literature, with no evidence of toxicity at typical supplemental doses.
How to Use
How should collagen peptides be used to improve skin appearance? Here are the key practical considerations from the research.
Forms available
Collagen most commonly comes as peptides — short chains of amino acids — also called hydrolysed collagen. Labels often specify "Collagen Peptides Type 1" or "Type 3," which refers to the original type of collagen strand that was broken into shorter peptides. Based on the current data, the original collagen type does not appear to matter significantly for skin effects, because those original protein structures have already been broken into shorter, bioavailable pieces regardless of their source type.
Dose
The range of collagen peptide intake shown to be effective across published studies is between 2.5 and 15 g per day [13]. Most studies that have demonstrated measurable skin improvements have used doses in the 5–10 g range, though the November 2024 study showing improvements in skin density used just 5 g daily over 6 months.
Duration
Collagen peptides are a supplement for the long term. Studies consistently find that measurable effects emerge over weeks or months — not days. The 90-day study showing 14–31% wrinkle reduction is a useful benchmark: meaningful results require sustained, consistent use. Results will not be visible immediately after starting supplementation.
Sun protection
If collagen peptides are being taken to build up the skin from the inside, it also makes sense to reduce damage from the outside. The most significant source of skin damage and accelerated ageing is sun exposure. Ultraviolet (UV) rays in sunlight break down the very collagen that supplementation is working to restore and preserve.
To protect skin from the sun:
1. Spend less time in direct sunlight, especially during the middle of the day when UV intensity is at its highest.
2. Wear sunscreen and protective clothing when outdoors.
For maximum protection, sunscreen with SPF 50 or higher is recommended by most dermatological guidelines.
References
1. https://www.oaepublish.com/articles/2347-9264.2020.153
2. https://pubmed.ncbi.nlm.nih.gov/36516059/
3. https://pmc.ncbi.nlm.nih.gov/articles/PMC10180699/
4. https://pubmed.ncbi.nlm.nih.gov/37822045/
5. https://pubmed.ncbi.nlm.nih.gov/39143887/
6. https://www.mdpi.com/1420-3049/26/16/4880
7. https://pmc.ncbi.nlm.nih.gov/articles/PMC10799148/
8. https://pubmed.ncbi.nlm.nih.gov/37551682/
9. https://pmc.ncbi.nlm.nih.gov/articles/PMC3583886/
10. https://pubmed.ncbi.nlm.nih.gov/31859087/
11. https://pmc.ncbi.nlm.nih.gov/articles/PMC7070905
