Glycation and Skin: How Sugar, AGEs and Collagen Cross-Links Age Skin
Start with our pillar guide: What Is the Skin Barrier? The Science of Hydration, Ceramides and Occlusives, or browse all Skincare Fundamentals articles.
Glycation and skin aging are linked: sugars bond to collagen and elastin without enzymes, forming advanced glycation end products (AGEs) that stiffen skin and build up with age. Anti-glycation creams and diets look promising in the lab. However, the only 12-week human trial that measured skin AGEs found no measurable change. Evidence: Limited.
This page explains the mechanism, shows what the human data actually measure, and separates lab results from skin results. For the basics of how skin holds water and protects itself, start with our guide to the skin barrier and hydration.
Key takeaways
- A 2026 review says AGEs form cross-links in collagen and elastin that "reduce elasticity, increase stiffness, and impair tissue repair" (Haykal, 2026).
- In 102 healthy adults aged 19 to 80, skin AGEs "increased with age," with no significant gender difference (Xin et al., 2021).
- In a 12-week study of 20 women with type II diabetes, an anti-glycation cream improved appearance scores, but the study was "insufficient to measure a change in skin AGEs" (Draelos et al., 2009).
- High-fructose damage to skin cells has been shown only in lab cultures, in a study funded by Estée Lauder (Rella et al., 2025).
- A 2011 review said anti-glycation products are on the market but "clinical trials are often lacking" (Farris, 2011).
What is glycation in skin?
Glycation in skin is a reaction in which sugars attach to proteins such as dermal collagen without an enzyme controlling the process. The products of this reaction are collectively called advanced glycation end products, or AGEs.
A 2022 review calls this reaction "skin saccharification" and describes it as "one of the basic root causes of endogenous skin aging," meaning aging driven from inside the body (Zheng et al., 2022). AGEs form through several stages and pathways, and they accumulate in tissues over time. A 2024 review lists protein glycation among the aging theories "best supported by evidence" (Dorf & Maciejczyk, 2024). Evidence: Moderate (mechanism, consistent across reviews).
How does skin glycation damage collagen and elastin?
AGEs link collagen and elastin fibers to each other, much like extra stitches in a fabric. The result is stiffer, less elastic skin that repairs itself more slowly.
A 2026 narrative review explains that AGEs build up in dermal proteins and induce cross-links (Haykal, 2026). AGEs also bind a receptor called RAGE. That receptor signal "amplifies oxidative stress and inflammation," which speeds up breakdown of the dermis. The review ties glycation to wrinkles, laxity, uneven pigment and impaired healing. Its funding was not reported in the abstract.
A 2022 review adds "dull yellowing" to that list (Zheng et al., 2022). Much of the cross-link evidence is not from human skin. A 2025 review notes that glycation increases cross-links in the tail tendon collagen of animals, which prolongs how long that collagen takes to break down (Choi et al., 2025). Evidence: Lab / animal only for cross-linking; expert opinion for visible skin effects.
Does glycation in skin increase with age?
Yes. The clearest human data come from a study of 102 healthy adults, in which skin AGE levels rose across 3 age groups.
The study split participants into groups aged 19–40, 41–60 and 61–80, and measured AGEs with fluorescence spectroscopy (Xin et al., 2021). AGEs "increased with age," and the difference between groups was statistically significant. Men and women showed no significant difference. Funding was not reported in the abstract.
The links to elasticity are harder to interpret. In the youngest group, AGEs had no significant relationship with skin elasticity. The 41–60 group showed a low correlation. In people over 60, the authors write that AGE levels were "significantly positively correlated with skin elasticity," which is the opposite of what the stiffening mechanism would predict. The abstract doesn't explain this. The design is also cross-sectional, so the study can't show that AGEs caused the age changes. Evidence: Limited (1 cross-sectional study).
Does sugar cause skin glycation?
Sugar is the raw material for glycation. However, no human study in our sources shows that eating less sugar lowers skin AGEs or improves wrinkles.
Here is what each type of evidence shows:
| Feature | Lab or animal evidence | Human evidence |
|---|---|---|
| Sugar and AGEs | High fructose impaired growth and wound closure in cultured skin cells (Rella) | No trial of cutting sugar measured skin |
| Dietary AGEs | Hydroxytyrosol eased AGE-induced skin aging in mice (Fan) | None found |
| UV exposure | Reviews say UV amplifies AGEs (Zheng) | No trial in our sources |
| Diet as a factor | Mechanism reviews | 'Unsuitable diet' listed as an aging factor (Dorf) |
Bottom line: Plausible mechanism, no human proof that diet changes skin glycation.
In the fructose study, skin cells grown in high-fructose conditions showed impaired growth, delayed closure of an artificial wound, inflammatory signals and higher senescence markers (p16, p21 and p53) (Rella et al., 2025). The Estée Lauder Companies funded the study, and 5 authors are its employees. These are cells in a dish, not skin on a person.
A 2022 review says UV radiation amplifies AGE build-up in skin (Zheng et al., 2022). No study in our sources tests whether sunscreen lowers skin AGEs. For sunscreen basics, see SPF numbers explained. Evidence: Lab / animal only.
How does diabetes relate to glycation and skin?
People with diabetes have higher AGE levels in their skin, which is why researchers use diabetic skin as a model of faster aging. One small cream trial was based on this idea.
The 2009 trial explains that chronic high blood sugar drives AGE production, and that AGEs are found "in increased concentration in diabetic skin, representing a model for accelerated aging" (Draelos et al., 2009). A 2025 review also suggests that GLP-1 receptor agonists may influence skin aging through AGE-RAGE activation, but this is a proposed mechanism, not a measured skin result (Paschou et al., 2025).
None of this is guidance on managing diabetes. Talk to your clinician about blood sugar and diet, and don't change a prescribed medication on your own. Evidence: Expert opinion.
Do anti-glycation creams work?
The evidence is thin. One human study improved appearance scores without changing skin AGEs. A newer study reported lower AGEs but left out its sample size.
The 2009 single-center study enrolled 20 women aged 55 and over with type II diabetes (Draelos et al., 2009). They applied a cream with blueberry extract (an AGE inhibitor) and C-xyloside twice daily for 12 weeks, and 19 finished the study. The investigator reported significant improvements in fine lines (P = 0.01), firmness, radiance, smoothness and overall appearance. Corneometry, a skin-hydration reading, also rose (P < 0.001); see our barrier and hydration guide for why moisturization alone can change appearance. However, the "12-week duration of the study was insufficient to measure a change in skin AGEs." The abstract describes no control group and doesn't report funding.
| Draelos et al., J Cosmet Dermatol, 2009 | 20 (19 completed) | 12 weeks | Blueberry extract + C-xyloside, twice daily | Appearance improved; no measurable change in skin AGEs |
| Shin et al., J Cosmet Dermatol, 2025 | Not reported | 4 weeks | New synthetic antioxidant (concentration not reported) | Lower skin AGEs at 2 and 4 weeks |
| Yoon et al., Molecules, 2022 | Not reported | Not reported | Cirsium japonicum flower extract | Broke collagen-AGE cross-links in the lab; clinical effects on wrinkles and elasticity reported |
| Markiewicz et al., Clin Cosmet Investig Dermatol, 2022 | Lab only | Not reported | Resveratrol derivatives | Fewer AGEs in 3D skin models |
Draelos et al., J Cosmet Dermatol, 2009
Result: Appearance improved; no measurable change in skin AGEs
Single-center study of women with type II diabetes. No control group described; funding not reported. Evidence: Early / preliminary.
Shin et al., J Cosmet Dermatol, 2025
Result: Lower skin AGEs at 2 and 4 weeks
Lab, skin-explant and healthy-volunteer tests. Authors declared no conflicts. Evidence: Early / preliminary.
Yoon et al., Molecules, 2022
Result: Broke collagen-AGE cross-links in the lab; clinical effects on wrinkles and elasticity reported
No clinical numbers in the abstract. Authors declared no conflicts. Evidence: Early / preliminary.
Markiewicz et al., Clin Cosmet Investig Dermatol, 2022
Result: Fewer AGEs in 3D skin models
Authors include Estée Lauder and HexisLab employees. Evidence: Lab / animal only.
No vehicle-controlled randomized trial of an anti-glycation topical appears in our sources.
In the 2025 study, healthy volunteers showed significantly lower skin AGE levels, plus better elasticity and hydration, after 2 and 4 weeks (Shin et al., 2025). The abstract gives no sample size or control details. Other candidates, such as dihydroartemisinin, have only lab data, and those authors work for Shanghai Jahwa (Zhao et al., 2026). A 2025 natural blend reduced AGEs in cells, zebrafish and mice only (Sun et al., 2025).
For peptides with stronger trial records, see our peptide ingredients ranked by evidence. Evidence: Early / preliminary.
Can supplements reduce skin glycation?
Possibly, but the human evidence is not there yet. A 2025 review concluded that dietary or topical antiglycation agents "may help mitigate skin aging induced by AGEs" (Choi et al., 2025). Its authors declared no conflicts.
The best-known hydroxytyrosol study (an antioxidant found in olives) was done in mice (Fan et al., 2025). It used 48 male mice aged 8 months over 16 weeks. The higher dose increased skin moisture, epidermal and dermal thickness, and collagen markers. We don't know whether that translates to people. For collagen products themselves, see our reviews of collagen supplement trials and collagen and vitamin C. Evidence: Lab / animal only.
How is skin glycation measured?
Skin glycation is usually measured with skin autofluorescence, a light-based reading of AGEs that needs no needle or biopsy. A 2024 review says aging "may also be assessed non-invasively" this way (Dorf & Maciejczyk, 2024).
Both the 2021 age study and the 2009 cream trial relied on fluorescence methods (Xin et al., 2021; Draelos et al., 2009). A 2026 review cautions that limitations "remain across skin tones" (Haykal, 2026). That means results may be less reliable for some people. Evidence: Expert opinion.
Where the evidence stops
- No vehicle-controlled RCT of any anti-glycation topical appears in our sources.
- No human diet trial has measured skin AGEs or wrinkles after cutting sugar.
- The only 12-week trial that measured skin AGEs found no measurable change.
- Most ingredient data come from lab or animal studies, several of them with cosmetics-industry ties.
- Autofluorescence is less reliable across skin tones.
- Energy-based devices are mentioned in reviews but not studied in our sources.
- Pregnancy, breastfeeding and drug interactions: no data; ask a clinician.
FAQ
What is glycation in skin?
Glycation is a reaction in which sugars bond to proteins such as collagen without enzymes, forming advanced glycation end products (AGEs). A 2026 review says AGEs build cross-links in collagen and elastin that reduce elasticity, increase stiffness and impair tissue repair.
How do AGEs affect the way skin looks?
Reviews link AGEs to wrinkles, loss of elasticity, laxity, uneven color, dull yellowing and slower healing. These links come mainly from mechanism and lab research, not from trials that lowered AGEs and then measured wrinkles.
Does glycation in skin get worse with age?
Yes. In a study of 102 healthy adults aged 19 to 80, skin AGEs increased with age across 3 age groups, with no significant difference between men and women.
Does eating sugar cause skin glycation?
Reviews describe glycation by sugars as a root cause of skin aging and list unsuitable diet as an aging factor. The direct high-fructose findings come from lab-grown cells in a study funded by Estée Lauder, and we found no human trial that cut sugar and measured skin AGEs or wrinkles.
Do anti-glycation creams work?
The evidence is thin. In a 12-week study of 20 women with type II diabetes, appearance scores improved, but the study period was insufficient to measure a change in skin AGEs, and no control group is described. A 2025 study reported lower skin AGEs after 2 and 4 weeks but did not state its sample size in the abstract.
Can supplements reduce glycation in skin?
A 2025 review concludes that supplements or topicals with antiglycation agents may help mitigate AGE-related skin aging. The hydroxytyrosol study often discussed in this area was done in mice, so the effect in people is unknown.
Can skin glycation be measured?
Yes. Skin autofluorescence measures the natural glow of AGEs in skin without a needle or biopsy. A 2026 review notes that the method has limitations across skin tones.
Can glycation in skin be reversed?
No human study in our sources shows that skin AGEs can be reversed. Lab work suggests some plant extracts can break collagen-AGE cross-links, but the only 12-week human trial that measured skin AGEs found no measurable change.
References
- Haykal D. Skin Glycomics: Unmasking the Role of Glycation End Products in Cutaneous Aging and Dermatology. J Cosmet Dermatol. 2026. Narrative review; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/42169381/
- Zheng W, et al. Research Advances on the Damage Mechanism of Skin Glycation and Related Inhibitors. Nutrients. 2022. Review; no conflicts declared. https://pubmed.ncbi.nlm.nih.gov/36364850/
- Dorf N, Maciejczyk M. Skin senescence-from basic research to clinical practice. Front Med (Lausanne). 2024. Review; no conflicts declared. https://pubmed.ncbi.nlm.nih.gov/39493718/
- Xin C, et al. Correlation analysis between advanced glycation end products detected noninvasively and skin aging factors. J Cosmet Dermatol. 2021. Cross-sectional, n=102; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/32333482/
- Draelos ZD, et al. An evaluation of the effect of a topical product containing C-xyloside and blueberry extract on the appearance of type II diabetic skin. J Cosmet Dermatol. 2009. Single-center clinical trial, n=20, 12 weeks, no control described; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/19527341/
- Farris PK. Innovative cosmeceuticals: sirtuin activators and anti-glycation compounds. Semin Cutan Med Surg. 2011. Review; funding not reported in abstract. https://pubmed.ncbi.nlm.nih.gov/21925370/
- Rella A, et al. Fructose-Induced Glycation End Products Promote Skin-Aging Phenotypes and Senescence Marker Expression in Human Dermal Fibroblasts. Int J Mol Sci. 2025. In vitro; funded by Estée Lauder Companies, 5 authors employees. https://pubmed.ncbi.nlm.nih.gov/40649936/
- Fan R, et al. Improvement Effect and Mechanism of Hydroxytyrosol on Skin Aging Induced Advanced Glycation End Products. Nutrients. 2025. Animal study, 48 mice + 6 young controls, 16 weeks; no conflicts declared. https://pubmed.ncbi.nlm.nih.gov/40944206/
- Choi JY, et al. Synthetic and Natural Agents Targeting Advanced Glycation End-Products for Skin Anti-Aging: A Comprehensive Review of Experimental and Clinical Studies. Antioxidants (Basel). 2025. Review; no conflicts declared. https://pubmed.ncbi.nlm.nih.gov/40298870/
- Shin K, et al. Anti-Glycation and Anti-Aging Efficacy of Newly Synthesized Antioxidant With Autophagy Stimulating Activity. J Cosmet Dermatol. 2025. In vitro, ex vivo and clinical, n not reported, 4 weeks; no conflicts declared. Authors affiliated with Incospharm Corp. https://pubmed.ncbi.nlm.nih.gov/40387285/
- Yoon S, et al. Effect of Cirsium japonicum Flower Extract on Skin Aging Induced by Glycation. Molecules. 2022. In vitro, 3D culture and clinical study, n not reported; no conflicts declared. Author affiliation: BioSpectrum, Inc. https://pubmed.ncbi.nlm.nih.gov/35408493/
- Markiewicz E, et al. Anti-Glycation and Anti-Aging Properties of Resveratrol Derivatives in the in-vitro 3D Models of Human Skin. Clin Cosmet Investig Dermatol. 2022. In vitro; authors employed by Estée Lauder and HexisLab. https://pubmed.ncbi.nlm.nih.gov/35615726/
- Zhao Y, et al. Potential Cosmetic Applications of Dihydroartemisinin. Molecules. 2026. In vitro; authors employed by Shanghai Jahwa United. https://pubmed.ncbi.nlm.nih.gov/41599277/
- Sun C, et al. Mixtures of EGCG, bamboo leaf flavonoids, and broccoli seed water extracts exhibit anti-glycation and skin-protective effects. Phytomedicine. 2025. Cell, zebrafish and mouse models; no competing interests declared. Authors affiliated with Beijing Qingyan Boshi Health Management Co. https://pubmed.ncbi.nlm.nih.gov/40081290/
- Paschou IA, et al. GLP-1RA and the possible skin aging. Endocrine. 2025. Review; no competing interests declared. https://pubmed.ncbi.nlm.nih.gov/40498168/
Disclosure: This article is for general information only. It is not medical advice. Peptide Skincare has no affiliate links in this article and received no payment from any manufacturer mentioned. This article does not replace medical advice; talk to a clinician about blood sugar and diet changes, and never change a prescribed medication on your own.