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Cortisol Face

Chu B, Marwaha K, Ayers D, Sanvictores T. Physiology, Stress Reaction. PubMed. Published May 7, 2024. https://www.ncbi.nlm.nih.gov/books/NBK541120/

Tomiyama AJ. Stress and obesity. Annual review of psychology. 2019;70(1):703-718. doi:https://doi.org/10.1146/annurev-psych-010418-102936

Uwaifo GI, Hura DE. Hypercortisolism. PubMed. Published July 4, 2023. https://www.ncbi.nlm.nih.gov/books/NBK551526/

Thau L, Gandhi J, Sharma S. Physiology, Cortisol. National Library of Medicine. Published August 28, 2023. https://www.ncbi.nlm.nih.gov/books/NBK538239/

Ortiz R, Kluwe B, Odei JB, et al. The association of morning serum cortisol with glucose metabolism and diabetes: The Jackson Heart Study. Psychoneuroendocrinology. 2019;103:25-32. doi:https://doi.org/10.1016/j.psyneuen.2018.12.237

Ortiz R, Kluwe B, Lazarus S, Teruel MN, Joseph JJ. Cortisol and cardiometabolic disease: a target for advancing health equity. Trends in endocrinology and metabolism: TEM. 2022;33(11):786-797. doi:https://doi.org/10.1016/j.tem.2022.08.002

Morgante C, Camma C, Petta S, Guarnotta V, Arnaldi G. Relation between cortisol and metabolic dysfunction-associated steatotic liver disease: A dog chasing its tail. World Journal of Gastroenterology. 2026;32(16). doi:https://doi.org/10.3748/wjg.v32.i16.116142

Thota S, Akbar A. Insulin. PubMed. Published 2023. https://www.ncbi.nlm.nih.gov/books/NBK560688/

Delgado MR, Fareri DS, Chang LJ. Characterizing the mechanisms of social connection. Neuron. 2023;111(24). doi:https://doi.org/10.1016/j.neuron.2023.09.012

Twohig-Bennett C, Jones A. The Health Benefits of the Great outdoors: a Systematic Review and meta-analysis of Greenspace Exposure and Health Outcomes. Environmental Research. 2018;166(1):628-637. doi:https://doi.org/10.1016/j.envres.2018.06.030

Corazon SS, Sidenius U, Poulsen DV, Gramkow MC, Stigsdotter UK. Psycho-Physiological Stress Recovery in Outdoor Nature-Based Interventions: A Systematic Review of the Past Eight Years of Research. International Journal of Environmental Research and Public Health. 2019;16(10):1711. doi:https://doi.org/10.3390/ijerph16101711

Singh T, Ahmed TH, Mohamed N, et al. Does insufficient sleep increase the risk of developing insulin resistance: A systematic review. Cureus. 2022;14(3). doi:

https://doi.org/10.7759/cureus.23501

When Vitamin D Levels Improve

Office of Dietary Supplements - Vitamin D. Nih.gov. Published 2025. Accessed April 9, 2026. https://ods.od.nih.gov/factsheets/VitaminD-HealthProfessional/?uid=312bb47a6dcb5s16

Wang L, Su S, Liu Y. Meta-analysis of the effect of vitamin D on depression. Frontiers in Psychiatry. 2025;16. doi:https://doi.org/10.3389/fpsyt.2025.1622796

Bishop E, Ismailova A, Dimeloe SK, Hewison M, White JH. Vitamin D and immune regulation: antibacterial, antiviral, anti‐inflammatory. JBMR Plus. 2020;5(1). doi:https://doi.org/10.1002/jbm4.10405