Medical Citations

Glow Guide – Facial Harmony

Effective Date: 5/12/2026
Last Updated: 5/12/2026

Glow Guide is designed for personal appearance reflection and general wellness education only. The app does not diagnose, treat, prevent, or monitor any medical, dermatological, dental, orthodontic, psychological, or cosmetic condition. The app does not provide medical advice, cosmetic procedure advice, diagnosis, treatment recommendations, or professional evaluation.

The app’s facial harmony score, facial structure labels, and appearance insights are private, app-generated estimates based on visible image features in the photo you upload. These outputs are intended for personal reflection and entertainment, not as objective measurements of attractiveness, health, identity, facial development, or personal value.

Sources & Citations

Facial Proportion, Balance, and Anthropometry

Facial anthropometry is the study of facial measurements, proportions, and soft-tissue relationships. Research literature describes anthropometry as a method used to evaluate facial proportions, though it also recognizes that measurement error and population variation exist.
Source: “Standards of Facial Esthetics: An Anthropometric Study,” Journal of Maxillofacial and Oral Surgery, available through PubMed Central.
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC3485457/
Citation: Chandra HJ, Ravi MS, Sharma SM, Rajendra Prasad B. “Standards of Facial Esthetics: An Anthropometric Study.” J Maxillofac Oral Surg. 2012.

Digital anthropometry and facial imaging can be used to evaluate craniofacial form, but these methods depend on image quality, landmarks, measurement technique, and context.
Source: “Application of Digital Anthropometry for Craniofacial Assessment,” Craniomaxillofacial Trauma & Reconstruction, available through PubMed Central.
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC4078131/
Citation: Jayaratne YSN, Zwahlen RA. “Application of Digital Anthropometry for Craniofacial Assessment.” Craniomaxillofac Trauma Reconstr. 2014.

Facial proportions are commonly studied in orthodontics, maxillofacial analysis, and aesthetic research, but there is no single universal standard that applies perfectly to every person, population, or image.
Source: “Evaluation of Facial Beauty Using Anthropometric Proportions,” The Scientific World Journal, available through PubMed Central.
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC3951104/
Citation: Milutinovic J, Zelic K, Nedeljkovic N. “Evaluation of Facial Beauty Using Anthropometric Proportions.” ScientificWorldJournal. 2014.

Symmetry, Attractiveness, and Facial Perception

Research on facial perception suggests that symmetry, averageness, skin cues, and sexually dimorphic shape cues may influence attractiveness judgments, but attractiveness is complex and affected by social, cultural, contextual, and individual factors.
Source: “Facial attractiveness: evolutionary based research,” Philosophical Transactions of the Royal Society B, available through PubMed Central.
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC3130383/
Citation: Little AC, Jones BC, DeBruine LM. “Facial attractiveness: evolutionary based research.” Philos Trans R Soc Lond B Biol Sci. 2011.

Some studies have found relationships between facial symmetry and attractiveness ratings, but these findings should not be interpreted as a universal rule or as a measure of personal worth.
Source: “Facial attractiveness, symmetry and cues of good genes,” Proceedings of the Royal Society B, available through PubMed Central.
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC1690211/
Citation: Scheib JE, Gangestad SW, Thornhill R. “Facial attractiveness, symmetry and cues of good genes.” Proc Biol Sci. 1999.

Perception of facial asymmetry has limits, and small differences in symmetry may not be meaningfully noticeable to observers.
Source: “Limits in the Perception of Facial Symmetry,” Journal of Clinical Medicine, available through PubMed Central.
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC11595402/
Citation: Eißing FL, et al. “Limits in the Perception of Facial Symmetry.” J Clin Med. 2024.

Photo, Camera, and Image Quality Limitations

Image-based facial analysis can be affected by photo quality, lighting, camera angle, facial pose, resolution, expression, lens distortion, and other image conditions. These factors can change how facial features appear in a photo without reflecting a true change in a person’s face.
Source: “Forensic Facial Comparison: Current Status, Limitations, and Future Directions,” Biology, available through PubMed Central.
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC8698381/
Citation: Bacci N, et al. “Forensic Facial Comparison: Current Status, Limitations, and Future Directions.” Biology. 2021.

Three-dimensional facial photogrammetry and facial scanning research show that facial measurement depends on standardized image capture, landmark detection, and technical methodology. Glow Guide uses ordinary user-uploaded images, not a clinical 3D imaging system.
Source: “Facial Anthropometry Measurements Using 3D Stereophotogrammetry Analysis,” available through PubMed Central.
Link: https://pmc.ncbi.nlm.nih.gov/articles/PMC8783922/
Citation: Adekunle AA, et al. “Facial Anthropometry Measurements Using 3D Stereophotogrammetry Analysis.” 2021.

Skin Appearance and General Skincare Education

Where the app references visible skin clarity, texture, acne-like appearance, or sun-related skin appearance, those statements are general educational information only and are not medical findings.

The American Academy of Dermatology Association provides public guidance on sun protection, including shade, protective clothing, and broad-spectrum, water-resistant sunscreen with SPF 30 or higher.
Source: American Academy of Dermatology Association — “How to Prevent Skin Cancer”
Link: https://www.aad.org/public/diseases/skin-cancer/prevent/how

The U.S. Food & Drug Administration provides public guidance on sunscreen use, sun exposure, protective clothing, and broad-spectrum sunscreen.
Source: U.S. Food & Drug Administration — “Sunscreen: How to Help Protect Your Skin from the Sun”
Link: https://www.fda.gov/drugs/understanding-over-counter-medicines/sunscreen-how-help-protect-your-skin-sun

Mayo Clinic provides general educational information about acne, including that acne can involve hair follicles becoming plugged with oil and dead skin cells.
Source: Mayo Clinic — “Acne: Symptoms and Causes”
Link: https://www.mayoclinic.org/diseases-conditions/acne/symptoms-causes/syc-20368047

Body Image and Mental Wellbeing

Glow Guide should be used as a light self-reflection tool, not as a judgment of personal value. If appearance tracking causes distress, anxiety, compulsive checking, or negative self-image, stop using the feature and consider speaking with a qualified mental health professional.

The National Institute of Mental Health provides public information about body dysmorphic disorder, including distress related to perceived flaws in appearance.
Source: National Institute of Mental Health — “Body Dysmorphic Disorder”
Link: https://www.nimh.nih.gov/health/topics/body-dysmorphic-disorder

Important Limitations

Glow Guide’s facial analysis is not a clinical facial examination, dermatology exam, orthodontic assessment, dental assessment, plastic surgery consultation, psychological evaluation, or medical measurement.

The app does not:

  • Diagnose acne, rosacea, eczema, melanoma, infection, or any other skin condition

  • Diagnose facial asymmetry, jaw disorders, dental issues, orthodontic conditions, craniofacial conditions, or developmental conditions

  • Measure health, fertility, hormones, genetics, biological status, or disease risk

  • Provide medical, dermatological, dental, orthodontic, surgical, or psychological advice

  • Recommend cosmetic procedures, medication, supplements, injections, surgery, or treatment

  • Guarantee attractiveness, appearance outcomes, confidence, social results, or how others will perceive you

  • Replace a dermatologist, physician, dentist, orthodontist, psychologist, therapist, or other licensed professional

Your result may change from photo to photo. This does not necessarily mean your face changed. Lighting, camera angle, focal length, head tilt, expression, grooming, skin condition, lens distortion, filters, and image quality can all affect the output.

For medical concerns, changing moles, persistent acne, rashes, irritation, infection, pain, swelling, jaw issues, dental concerns, facial injury, severe asymmetry, or distress about appearance, consult a licensed healthcare professional.