Written by the Nuvirox Research Team
Key Points
- Crepey skin results from a combination of collagen loss, elastin degradation, and thinning of the dermis — collagen supplementation targets only one part of that picture.
- RCT evidence supports modest improvements in skin elasticity and hydration from oral collagen, which are the two parameters most relevant to crepiness, though effect sizes are small.
- Sun protection and resistance training have stronger independent evidence for the underlying causes of crepey skin than collagen supplementation does alone.
Short answer: there's a reasonable mechanistic and clinical case that collagen supplements can help, modestly, but they address only part of what causes crepey skin. Crepey skin — thin, finely wrinkled skin that looks a bit like crepe paper, most common on the upper arms, under the eyes, and the backs of the hands — results from a combination of factors: declining collagen density, breakdown of elastin (the protein that lets skin snap back into place), and progressive thinning of the dermis with age and sun exposure. Oral collagen peptides have real trial support for improving skin hydration and elasticity, both of which are relevant to how "crepey" skin looks and feels. But they don't address elastin loss directly, and the effect sizes in the trials are modest, not transformative.
Why skin becomes crepey in the first place
Three structural changes combine to produce the crepey look: reduced collagen density in the dermis (skin's main structural layer), degradation of elastin fibers that give skin its snap-back quality, and thinning of the epidermis and subcutaneous fat layer that normally give skin a plumper appearance. Sun exposure accelerates all three through a process called photoaging, which is why crepey skin is often more pronounced on chronically sun-exposed areas like the forearms and chest compared to typically covered areas. This elastin-and-collagen disruption mechanism overlaps with what happens in stretch marks, though stretch marks form from rapid mechanical stretching rather than gradual age-related decline.
What the collagen trials measure — and how it relates
The 2023 Nutrients meta-analysis of 26 RCTs (1,721 participants) found hydrolyzed collagen significantly improved both skin hydration and elasticity versus placebo Pu SY, Huang YL, Pu CM, et al. Effects of oral collagen for skin anti-aging: a systematic review and meta-analysis. Nutrients. 2023;15(9):2080. PMID: 37432180.. Elasticity is measured objectively in most of these trials with a cutometer, a device that gauges how well skin springs back after gentle suction — which is directly relevant to the "crepey" quality, since that look is largely a loss of spring-back capacity.
A more recent trial specifically in women aged 43–65 (a population where crepiness is common) found that 5 g/day of collagen peptides over 84 days improved dermis density and skin elasticity compared to placebo, alongside improvements in nail health Vleminckx S, Virgilio N, Asserin J, Prawitt J, Silva CIF. Influence of collagen peptide supplementation on visible signs of skin and nail health and -aging in an East Asian population: a double-blind, randomized, placebo-controlled trial. J Cosmet Dermatol. 2024;23(11):3645-3653. PMID: 39143887.. Dermis density is a particularly relevant outcome here, since a thinner dermis is one of the direct structural causes of crepiness.
A note before you read on
As with the broader collagen-and-skin literature, the most rigorous funding-adjusted analysis to date found that these elasticity benefits were concentrated in industry-funded and lower-quality trials, and were not statistically significant in the independently funded, high-quality subset Myung SK, Park Y. That doesn't mean the Vleminckx or Pu findings are wrong — it means the honest picture includes real uncertainty about effect size.
What collagen supplements don't directly address
Elastin is a separate protein from collagen, and while some collagen peptides may indirectly support elastin-producing cells (fibroblasts), no major human trial has demonstrated that oral collagen supplementation restores lost elastin function specifically. This matters because elastin loss — not just collagen decline — is a large part of what makes skin look crepey rather than simply thinner. Sun damage is also a primary driver, and no supplement, including collagen, substitutes for daily sun protection in preventing further elastin and collagen breakdown.
What actually helps crepey skin, evidence-wise
- Daily broad-spectrum sunscreen has the strongest independent evidence for slowing further collagen and elastin breakdown — prevention outperforms most reversal strategies here.
- Topical retinoids have decades of RCT support for stimulating new collagen production and improving skin texture, with generally larger effect sizes than oral collagen in comparable trials.
- Resistance training may help indirectly by supporting the fat and muscle layer beneath the skin, which affects how loose or taut the overlying skin appears.
- Oral collagen peptides can be a reasonable modest addition to this stack, based on the hydration and elasticity trial data, with realistic expectations set at 8–12+ weeks for any measurable change.
Study Snapshot
Vleminckx et al., 2024
| Design | Double-blind, randomized, placebo-controlled |
| Sample | 85 women, ages 43–65 |
| Dose & duration | 5 g/day collagen peptides, 84 days |
| Key finding | Significant improvement in dermis density & elasticity vs. placebo |
| Limitation | Single formulation, industry-adjacent authorship |
Frequently asked questions
Can collagen supplements reverse crepey skin that's already there?
The trial evidence supports modest improvement in elasticity and hydration, not reversal to a younger baseline. Think of it as a small shift in trajectory rather than an undo button.
Is crepey skin the same as loose skin from weight loss?
They overlap but aren't identical. Rapid weight loss can produce loose skin mainly from reduced volume beneath the skin, while age-related crepiness is more about structural collagen and elastin changes within the skin itself. See our piece on collagen and weight loss for more on the loose-skin-after-weight-loss question specifically.
Does where on the body matter?
Yes — areas with more cumulative sun exposure (forearms, chest, back of hands) tend to show more pronounced crepiness than typically covered areas, which points to sun protection as a key prevention lever.
How long until I'd notice a difference?
Most positive trials measured outcomes at 8, 12, or 24 weeks. Consistent daily use for at least three months is a reasonable timeline before evaluating results.
Does marine or bovine collagen work better for this?
Head-to-head comparisons in the literature generally don't show a strong difference between sources for skin elasticity outcomes; see our full breakdown at marine vs. bovine collagen.
Is crepey skin related to sun exposure over the years?
Yes, substantially — see our dedicated piece on collagen and sun damage for how UV exposure specifically accelerates this.
Where on the body crepiness shows up first, and why
Crepiness tends to appear earliest in areas with thin skin and repeated movement: under the eyes, the upper inner arms, the neck, and the backs of the hands. Thin skin has less structural reserve to begin with, so the same percentage decline in collagen and elastin shows up more visibly there than on thicker-skinned areas like the back or thighs. Repeated movement (blinking, arm motion) may also contribute mechanical fatigue to the elastin network over decades, similar to how repeatedly folding paper eventually creates permanent creases. This is part of why under-eye skin and upper-arm skin are common early sites, independent of overall body sun exposure.
From Nuvirox
Why we formulated Collagen+ Complex
We built Collagen+ Complex around the same research-first principle behind everything we make: start with what the human trials actually show, and formulate to that standard rather than to a marketing trend. Because the supplement field moves quickly and our own formulation is under ongoing review as new research comes in, we keep our label matched to the current evidence rather than locking in claims that may outrun it.
Every order is backed by our 60-day money-back guarantee — long enough to actually evaluate it the way the research says you should.
Learn more about Collagen+ Complex →The bottom line
Crepey skin has multiple causes, and collagen supplementation has real, if modest, trial support for two of the relevant mechanisms — hydration and elasticity — while leaving elastin loss and sun damage largely unaddressed. The most defensible approach pairs daily sun protection and, ideally, a topical retinoid with collagen supplementation as a supporting layer, not a standalone fix, and with a realistic three-month-plus timeline before judging results.
References
- Pu SY, Huang YL, Pu CM, et al. Effects of oral collagen for skin anti-aging: a systematic review and meta-analysis. Nutrients. 2023;15(9):2080. PMID: 37432180.
- Vleminckx S, Virgilio N, Asserin J, Prawitt J, Silva CIF. Influence of collagen peptide supplementation on visible signs of skin and nail health and -aging in an East Asian population: a double-blind, randomized, placebo-controlled trial. J Cosmet Dermatol. 2024;23(11):3645-3653. PMID: 39143887.
- Myung SK, Park Y. Effects of collagen supplements on skin aging: a systematic review and meta-analysis of randomized controlled trials. Am J Med. 2025;138(9):1264-1277. PMID: 40324552.
*These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease. This article is for informational purposes only and is not a substitute for professional medical advice.