Does collagen really work on wrinkles?

There is currently no solid clinical evidence establishing that collagen supplements reduce wrinkles. The most recent meta-analysis, published in 2025 in The American Journal of Medicine, covers 23 randomized trials and 1,474 participants.

Does collagen reduce wrinkles?

The honest answer is: the data does not allow us to confirm this. Two recent meta-analyses reach opposing conclusions, and the difference lies in their analysis method.

Meta-analysis	Trials included	Participants	Conclusion
Pu et al., Nutrients, 2023	26 randomized trials	1,721	Improvement in skin hydration and elasticity
Myung and Park, The American Journal of Medicine, 2025	23 randomized trials	1,474	Overall positive effect, but null in independent trials and high-quality trials

The 2025 team did what previous studies had not: they analyzed results separately based on funding source and the methodological quality of each trial.

Across all 23 trials, collagen improves hydration, elasticity, and wrinkles. In the subgroup of trials not funded by the pharmaceutical industry, there is no effect on any of these three criteria.

The same pattern appears with methodological quality: high-quality trials show no significant effect, while low-quality trials show one for elasticity.

The authors conclude that there is no clinical evidence to support the use of collagen for skin aging.

Why two serious studies say the opposite

The divergence does not stem from an error in one or the other. It comes from the filter applied to the source data, and understanding this filter empowers you to evaluate any brand's promises.

Collagen research is very largely funded by ingredient manufacturers. This is common in nutrition, and it does not make a trial false. But funding is statistically associated with more favorable results, which the 2025 meta-analysis measured directly.

The authors themselves state that they received no funding and have no conflicts of interest. Their conclusion sparked a dispute published in August 2025 by an alliance of industry stakeholders, who criticized them for errors in classifying funding sources.

The debate therefore remains open between an independent group and parties with a commercial interest. Our position: as long as it is not settled, we will not build any sales arguments around wrinkles.

What we sell, and what we do not claim

What European regulations actually authorize

No health claim related to wrinkles exists for collagen in the European Union. Regulation (EU) No. 432/2012 does not recognize any effect for collagen, regardless of its source—marine, bovine, or eggshell.

Only one mention can legally accompany this type of product, and it concerns vitamin C: it contributes to normal collagen formation for the normal function of skin, bones, and cartilage.

The nuance matters. This claim describes a physiological role of vitamin C in your body's production of collagen. It says nothing about a visible effect on wrinkles, and Regulation (EC) No. 1924/2006 forbids letting it say anything more.

A brand that writes "fills in wrinkles," "proven anti-aging effect," or "reduces wrinkles by 20%" is overstepping these bounds. This practice is common in the French collagen market and exposes products to being removed from Google Shopping.

What actually acts on facial wrinkles

Sun exposure weighs much more heavily than any supplement. A study conducted on 298 women aged 30 to 78, published in Clinical, Cosmetic and Investigational Dermatology in 2013, attributes about 80% of visible signs of facial aging to ultraviolet rays.

Women classified as sun-exposed had more wrinkles than those who avoided the sun, a marked difference after age 50. The authors describe skin aging as being primarily extrinsic, and therefore largely modifiable.

Other documented factors fall into the same category: habits rather than pills.

• Tobacco, associated with accelerated degradation of dermal fibers.
• The drop in estrogen at menopause, which slows the activity of fibroblasts, the cells that make collagen.
• Sleep and chronic stress, linked to the quality of the skin barrier.
• Total protein intake, the raw material for all protein synthesis, including collagen.
• Daily sun protection, including in winter and indoors near a window.

This list is not spectacular, and that is precisely why it doesn't sell well. It remains the best-documented.

How to read a brand promise in two minutes

Five questions are enough to evaluate the reliability of a figure displayed on a box or product page. We use them ourselves before citing a study.

• Who funded the trial? The mention appears at the end of the scientific article, in the "funding" or "conflicts of interest" section.
• How many participants? A trial on 30 people does not allow for generalization, even with a significant result.
• How long? Serious skin protocols last at least 8 to 12 weeks.
• Was there a placebo? Without a control group, you are measuring the effect of time and the attention paid to one's skin, not the product.
• Was the criterion measured or self-reported? A self-assessment score does not have the value of an instrumental measurement of wrinkle depth.

An additional signal: look to see if the brand cites the full study with its title, journal, and year, or only an isolated percentage. A figure without a verifiable reference is worth nothing.

Apply these five questions to the next supplement advertisement you come across. The result is often instructive.

Should you stop taking collagen anyway?

No, and that is not the issue. The lack of established proof regarding wrinkles does not mean that these products are useless or risky; it means that the dominant marketing promise exceeds the data.

The tolerability of these supplements is well documented. A trial conducted in 2025 on 100 women aged 25 to 60, taking 600 mg of eggshell membrane daily for 12 weeks, reported no adverse effects.

What you can reasonably expect from a course: a supply of vitamin C covering 100% of the NRV, and a supplement for the connective matrix as part of a balanced diet. Nothing more, nothing less.

If your expectations are for a visible change to your face, sun protection, quitting smoking, and a dermatological consultation will bring you more than changing your collagen brand.

Our position can be summarized in one sentence: we sell a documented and traceable nutritional supplement, not an aesthetic result. The day an independent meta-analysis concludes otherwise, we will update this article.

Frequently Asked Questions

Why do so many brands display results regarding wrinkles?

Because these figures come from trials funded by ingredient manufacturers, often conducted on small groups. They are real, but their weight in the literature remains contested.

Do collagen creams work better?

The collagen molecule is too large to cross the skin barrier to any depth. A cream works by surface hydration, which smoothes the skin's appearance without altering the dermis.

Is marine collagen more effective than eggshell collagen for the skin?

No direct comparison between these two sources allows us to decide. Protocols, doses, and measured criteria differ too much from one trial to another. See our dedicated article.

How long before judging a treatment?

Published trials measure their results at 8 or 12 weeks. Anything less than 2 months of daily intake makes assessment meaningless.

Is vitamin C alone enough?

It is the only nutrient in these formulas to carry an authorized claim related to collagen formation. A varied diet often covers these needs; a course helps ensure intake.

Is more expensive collagen better studied?

Price reflects the formula and branding, not the level of evidence. Check the milligram dose, the origin of the active ingredient, and the presence of a certificate of analysis instead.

Should you talk to your doctor about it?

Report any new intake if you are on long-term treatment or if you are pregnant or breastfeeding. A food supplement is not a medication.

Cited Studies

• Myung S.-K., Park Y. "Effects of Collagen Supplements on Skin Aging: A Systematic Review and Meta-Analysis of Randomized Controlled Trials." The American Journal of Medicine, 2025, 138(9), 1264-1277. Consult
• Pu S.-Y., Huang Y.-L., Pu C.-M. et al. "Effects of Oral Collagen for Skin Anti-Aging: A Systematic Review and Meta-Analysis." Nutrients, 2023, 15(9), 2080. Consult
• Park M., Won K., Lee J.H. et al. "Effects of oral supplementation with eggshell membrane (Ovoderm®-AS) on skin health: A randomized, double-blind, placebo-controlled trial." Journal of Functional Foods, 2025, 127, 106713. Consult
• Flament F., Bazin R., Laquieze S. et al. "Effect of the sun on visible clinical signs of aging in Caucasian skin." Clinical, Cosmetic and Investigational Dermatology, 2013, 6, 221-232. Consult

Regulatory and Complementary Sources

• Regulation (EU) No. 432/2012 establishing the list of authorized health claims. Consult
• Regulation (EC) No. 1924/2006 on nutrition and health claims made on foods.
• Industry reaction to the 2025 meta-analysis, NutraIngredients, August 26, 2025. Consult
• "Skin, hair and beyond: the impact of menopause." Climacteric, 2022. Consult

A food supplement is not a medication. It should be used as part of a healthy lifestyle and not as a substitute for a varied and balanced diet.

The cited works do not constitute authorized health claims within the meaning of Regulation (EC) No. 1924/2006 and do not prejudge any individual result.