What does this score mean?
The Trust Index is not a treatment success rate, but an editorial methodology score indicating to what extent the scientific finding evaluated on this page can be trusted. Study design, risk of bias, sample size, precision, direct applicability, reproducibility, transparency, and clinical relevance are evaluated together.
What did the study investigate?
It investigated whether topical quinoa bioester application shifts protein patterns in human skin toward a molecular profile associated with younger age.
How was it conducted?
In 61 women aged 20–80, the active formulation was applied to one forearm and the control formulation to the other forearm of the same individual for 30 days; skin samples were evaluated using LC-MS/MS proteomic analysis and machine learning.
What was found?
Particularly in the group aged 50 and older, the proteomic age estimation of the treated skin shifted toward a younger profile compared to the control side. The approximately 16-year difference is not a clinical age rejuvenation, but an output of the proteomic model.
Limitations of the study
The study is exploratory in nature, has a limited sample size, and consists solely of women; it does not directly demonstrate a 16-year rejuvenation in clinical appearance, wrinkles, or long-term skin aging. Industry ties also make independent validation important.
What does it mean clinically?
The findings suggest that a topical bioactive can produce measurable molecular changes in human skin; however, it is too early to interpret this as a clinically proven rejuvenating effect.
What do we not know yet?
Whether the effect can be replicated across different sexes and phototypes, whether it persists over the long term, to what extent it correlates with clinical skin appearance, and the optimal concentration remain unclear.
Reference
Full bibliographic details and links to sources are preserved in the detailed evaluation section of this page.
Written and medically reviewed by: Dr. Kerem Çağlayan · Information about skin rejuvenation · All Scientific Research
Detailed evaluation
What is the study?
The study by Camillo-Andrade et al. was published in Communications Biology on April 9, 2026, under the title Quinoa bioester application shifts human skin proteome toward molecular profiles associated with younger age. The study investigated whether a topical cosmetic active ingredient could alter large-scale protein patterns in human skin and whether this change was measurable in molecular age estimation.
Study design
A total of 61 women aged 20–80 with Fitzpatrick phototypes II–IV were included in the study. There was one participant for each age. The formulation containing quinoa bioester was applied to one forearm of each participant, while the vehicle formulation without the active ingredient was applied to the contralateral forearm. The products were used morning and evening for at least 30 days.
Samples were collected from both forearms at baseline and at the end of treatment, generating a total of 244 biological samples. Samples were analyzed with technical duplicates using LC-MS/MS mass spectrometry, yielding 488 raw data files, approximately 45.7 million tandem mass spectra, and up to 2,906 protein sequences.
Where does the “16-year rejuvenation” come from?
The researchers developed a Support Vector Regression (SVR)-based machine learning model to predict chronological age from pre-treatment skin proteomes. The model was then applied to samples following 30 days of application.
In 30 participants under the age of 50, an approximately 11-year median proteomic age difference was observed between the side treated with quinoa bioester and the vehicle side. The difference in this subgroup was not statistically significant. In 31 participants aged 50 and older, however, the median difference was approximately 16 years and was statistically significant (p<0.01).
The critical point here is that the researchers also specifically emphasize that these values cannot be directly interpreted as “biological years.” The model measures which age group the protein expression patterns most closely resemble. Therefore, the result should not be read as “skin was rejuvenated by 16 years,” but rather as “the proteomic profile of the treated skin shifted toward a molecular pattern associated with younger ages.”
Which proteins changed?
The effect was not merely limited to the machine learning score. Paired proteomic analysis showed changes in proteins associated with the epidermal barrier, oxidative stress defense, protease control, and cellular homeostasis.
- Filaggrin (FLG): important for the integrity of the epidermal barrier and the control of water loss.
- Desmoglein-1 (DSG1): one of the key components of intercellular junctions between keratinocytes and epidermal integrity.
- SOD1: one of the primary antioxidant enzymes involved in the detoxification of superoxide radicals.
- Glutaredoxin-1 (GLRX) and glutathione synthetase (GSS): associated with cellular redox balance and the glutathione system.
- SERPINB3, SERPINB7, and SERPINA12: protease inhibitors associated with the regulation of proteolytic activity.
- Dermcidin (DCD): a peptide involved in the skin’s innate antimicrobial defense.
The co-occurrence of these changes supports the hypothesis that quinoa bioester may act not just through a single target, but through multiple biological pathways such as barrier function, redox defense, and protease balance.
Hydration result
In hydration measurements performed with bioelectrical impedance, improvements were observed after both the vehicle and the active formulation. The mean change was 0.54 units for the vehicle and 1.14 units for the quinoa bioester. Although the increase was higher on the active side, the difference between the groups did not reach statistical significance (p=0.17). Therefore, it is not accurate to interpret the proteomic findings as proven clinical hydration superiority.
What exactly is the “quinoa bioester” used?
The active in the study is not ordinary quinoa oil or quinoa extract. It is a quinoa seed oil derivative whose cosmetic INCI name is Chenopodium Quinoa Seed Oil Ethyl Esters. This substance is a mixture of fatty acid ethyl esters obtained through the transesterification of Chenopodium quinoa seed oil with ethyl alcohol. It is listed as a skin conditioner and emollient in European cosmetic nomenclature.
In simplified terms, the process can be thought of as: quinoa seed → quinoa seed oil → transesterification with ethanol → quinoa seed oil ethyl esters. Therefore, ordinary “quinoa seed oil” purchased from the market or as a cosmetic raw material is not the same substance as the bioester used in the study.
What is the concentration used in the study?
There is an important scientific limitation in this regard. The published main text of the 2026 human study does not disclose the exact percentage concentration of the quinoa bioester used. Therefore, it is not accurate to equate the study results with a specific percentage.
According to Grupo Boticário’s statement regarding the study, the concentration used in the research is higher than the concentration in the company’s existing commercial products. The company reported that products containing this new dosage are planned to enter its portfolio starting in 2027. Therefore, it is not scientifically appropriate to directly expect the proteomic results of the study from quinoa-containing cosmetics sold today.
What did previous research show?
Earlier experimental studies in the same line of research indicated that quinoa bioester could affect mechanisms related to keratinocyte differentiation, the epidermal barrier, oxidative stress, and collagenase activity. The significance of the 2026 study is that it investigated these biological signals in real human skin using large-scale proteomic analysis and machine learning.
Strengths of the study
- A paired design in which one arm of the same individual served as the active and the other arm as the control.
- Large-scale proteomic data with 244 biological samples and technical duplicates from 61 participants.
- LC-MS/MS analysis extending up to approximately 2,900 protein sequences.
- Evaluation of molecular changes on a proteome-wide scale rather than with the conventional single-marker approach.
- An attempt to quantify molecular change through SVR-based age prediction.
Limitations of the study
Several important points should be taken into account when interpreting the results. The study is exploratory/proof-of-concept in nature. There is only one participant for each age; this makes it difficult to represent the biological diversity among individuals of the same chronological age. All participants are women, and individuals with similar skin characteristics from the same city were selected. Independent validation is required across different phototypes, in men, and in different geographic/ethnic populations.
Furthermore, the proteomic age algorithm and clinical skin rejuvenation are not the same thing. The study did not demonstrate “16 years fewer wrinkles,” “16 years of elasticity recovery,” or a 16-year reduction in an individual’s systemic biological age. The improvement in hydration also did not reach statistical significance.
Conflict of interest and funding
Some authors of the study are employees of Grupo Boticário, which develops and markets cosmetic products containing quinoa bioester. This relationship is explicitly declared in the article. The study was supported by CNPq, CAPES, Fiocruz/INOVA Fiocruz, Grupo Boticário, and other research funds. This does not invalidate the study; however, it makes replication of the results by independent research groups particularly important.
What does it mean from a clinical and longevity perspective?
The most important message of this study is not that a single cosmetic raw material “rejuvenates by 16 years.” In a broader perspective, it is showing that molecular protein patterns accompanying skin aging can be measurably altered with short-term topical interventions.
In the future, proteomic age clocks may become an objective research tool to compare different dermatological and longevity interventions, such as retinoids, peptides, polyphenols, photoprotection, laser, and energy-based procedures. For this, the models used must undergo external validation in larger and independent populations.
Conclusion
A 30-day application of quinoa bioester shifted the skin protein profile toward a proteomic pattern associated with younger ages, particularly in women over 50 years of age. The findings are also supported by changes in proteins related to the epidermal barrier and antioxidant defense. However, the statement that “the skin rejuvenated by 16 years” is a scientific overinterpretation. Today’s level of evidence is sufficient to position quinoa bioester as an interesting cosmetic bioactive worthy of investigation, but insufficient to define it as a clinically proven “16-year rejuvenation treatment.”
References
- Camillo-Andrade AC, Sales LA, Catarino CM, et al. Quinoa bioester application shifts human skin proteome toward molecular profiles associated with younger age. Communications Biology. 2026;9:775. DOI: 10.1038/s42003-026-10006-4. Original article.
- European cosmetic ingredient nomenclature: Chenopodium Quinoa Seed Oil Ethyl Esters — transesterification product of quinoa seed oil and ethyl alcohol; skin conditioning/emollient.
- Grupo Boticário. Grupo Boticário cria “régua molecular” que mede o envelhecimento cutâneo. 2026. Corporate announcement.
Medical evaluation note: This content has been prepared for the purpose of evaluating scientific research; it is not a personal diagnosis or treatment recommendation. The fact that a cosmetic active ingredient alters molecular markers does not indicate that it provides rejuvenation to the same extent clinically.