CGM-Guided Nutrition: Impact of Fat Quality on Glycemic Variability

Time-averaged glucose values measured as glycosylated hemoglobin (HbA1c) serve as a key indicator of glycemic control and have become the reference parameter for therapies aimed at reducing complications in type 2 diabetes mellitus (T2DM).[1] Elevated HbA1c despite normal fasting and premeal glucose levels may reflect postprandial glucose excursions. Continuous glucose monitoring (CGM) helps correlate glucose fluctuations with meals, exercise, and daily activities.[2] CGM analysis often identifies meal-related carbohydrates and dietary fat quality as contributors to glycemic variability and glucose excursions, while monounsaturated fatty acid (MUFA)-rich meals may help reduce glucose excursions, improve parameters of glycemic control, and lower T2DM risk.[3] Reference(s): 1. Song J, Oh TJ, Song Y. Individual Postprandial Glycemic Responses to Meal Types by Different Carbohydrate Levels and Their Associations with Glycemic Variability Using Continuous Glucose Monitoring. Nutrients. 2023;15(16):3571. Published 2023 Aug 13. doi:10.3390/nu15163571. https://pmc.ncbi.nlm.nih.gov/articles/PMC10459284/ 2. Suh S, Kim JH. Glycemic variability: how do we measure it and why is it important? Diabetes Metab J. 2015;39(4):273-282. doi:10.4093/dmj.2015.39.4.273. https://synapse.koreamed.org/articles/1084818 3. Schwingshackl L, Lampousi AM, Portillo MP, Romaguera D, Hoffmann G, Boeing H. Olive oil in the prevention and management of type 2 diabetes mellitus: a systematic review and meta-analysis of cohort studies and intervention trials. Nutr Diabetes. 2017;7(4):e262. Published 2017 Apr 10. doi:10.1038/nutd.2017.12. https://pmc.ncbi.nlm.nih.gov/articles/PMC5436092/  

Moving Beyond the Low-Fat Paradigm

Extra Virgin Olive Oil in Glycemic Control & Insulin Sensitivity: Clinical Evidence and Mechanisms

India faces a substantial diabetes burden, with 101 million affected adults and 136 million in the prediabetes window of prevention, underscoring the need for feasible dietary interventions.[1] Extra virgin olive oil (EVOO), distinguished by 70-85% MUFA content and bioactive polyphenols including oleocanthal, oleuropein, and hydroxytyrosol, demonstrates meaningful metabolic benefit.[2][3] A comprehensive dose-response meta-analysis of 51 RCTs (n=4,334) confirmed that 25–50 g/day significantly improves HOMA-IR (WMD −0.09; P=.024), supporting EVOO integration into Indian dietary patterns for glycemic modulation.[4] Reference(s): 1. Anjana RM, Unnikrishnan R, Deepa M, et al; ICMR-INDIAB Collaborative Study Group. Metabolic non-communicable disease health report of the ICMR-INDIAB national cross-sectional study (ICMR-INDIAB-17). Lancet Diabetes Endocrinol. 2023;11(7):474-489. doi:10.1016/S2213-8587(23)00119-5. https://pubmed.ncbi.nlm.nih.gov/37301218/ 2. Gorzynik-Debicka M, Przychodzen P, Cappello F, et al. Potential health benefits of olive oil and plant polyphenols. Int J Mol Sci. 2018;19(3):686. doi:10.3390/ijms19030686. https://pubmed.ncbi.nlm.nih.gov/29495598/ 3. Jimenez-Lopez C, Carpena M, Lourenço-Lopes C, et al. Bioactive Compounds and Quality of Extra Virgin Olive Oil. Foods. 2020;9(8):1014. Published 2020 Jul 28. doi:10.3390/foods9081014. https://pmc.ncbi.nlm.nih.gov/articles/PMC7466243/ 4. Takhttavous A, Rostampour K, Gerami S, Mohammadi-Sartang M. The Effect of Different Types of Olive Oil on Glucose Control and Insulin Sensitivity: A GRADE-Assessed Systematic Review and Dose-Response Meta-Analysis of 51 Randomized Controlled Trials. Nutr Rev. 2026;84(2):345-365. doi:10.1093/nutrit/nuaf099. https://pubmed.ncbi.nlm.nih.gov/40971936/

Integrating Anti-Inflammatory Nutrition With Standard Cardiometabolic Care

Anti-inflammatory nutrition is an evidence-based adjunct in cardiometabolic care, with olive oil as a key functional fat due to its high MUFA content (up to 85%) and bioactive polyphenols that reduce oxidative stress.[1][2][3][4] Strong clinical evidence supports its role across disease domains: in primary prevention, the PREDIMED trial demonstrated a significant reduction in major CVD events, while the CORDIOPREV trial confirmed benefits in secondary prevention with reduced MACE.[5][6] Additional RCT evidence in metabolic pregnancy-related dysregulation reports improved glycaemic control and reduced insulin requirement.[7] Incorporating olive oil within dietary patterns provides a practical adjunct to pharmacotherapy in cardiometabolic risk reduction.[8] Reference(s): 1. Prabhakaran D, Jeemon P, Roy A. Cardiovascular Diseases in India: Current Epidemiology and Future Directions. Circulation. 2016;133(16):1605–1620. doi:10.1161/CIRCULATIONAHA.114.008729. https://www.ahajournals.org/doi/10.1161/circulationaha.114.008729 2. Anjana RM, Unnikrishnan R, Deepa M, et al. Metabolic non-communicable disease burden report of India: the ICMR–INDIAB national cross-sectional study (ICMR-INDIAB-17). Lancet Diabetes Endocrinol. 2023;11(7):474–489. doi:10.1016/S2213-8587(23)00119-5. https://www.thelancet.com/journals/landia/article/PIIS2213-8587(23)00119-5/fulltext 3. Puri R, Mehta V, Duell PB, et al. Proposed low-density lipoprotein cholesterol goals for secondary prevention and familial hypercholesterolemia in India with focus on PCSK9 inhibitor monoclonal antibodies: Expert consensus statement from Lipid Association of India. Clin Lipidol. 2020;14(2). doi:10.1080/21602006. https://www.sciencedirect.com/science/article/pii/S1933287420300064 4. Jimenez-Lopez C, Cardenas M, Lourenco-Lopes C, et al. Bioactive Compounds and Quality of Extra Virgin Olive Oil. Foods. 2020;9(8):1014. doi:10.3390/foods9081014. https://www.mdpi.com/2304-8158/9/8/1014 5. Estruch R, Ros E, Salas-Salvadó J, et al. Primary Prevention of Cardiovascular Disease with a Mediterranean Diet Supplemented with Extra-Virgin Olive Oil or Nuts. N Engl J Med. 2018;378(25):e34. doi:10.1056/NEJMoa1800389. https://www.nejm.org/doi/full/10.1056/NEJMoa1800389 6. Delgado-Lista J, Alcala-Diaz JF, Torres-Peña JD, et al. Long-term secondary prevention of cardiovascular disease with a Mediterranean diet and low-fat diet (CORDIOPREV): a randomized controlled trial. Lancet. 2022;399(10383):1876–1885. doi:10.1016/S0140-6736(22)00122-2. https://linkinghub.elsevier.com/retrieve/pii/S0140-6736(22)00122-2 7. Xia M, Zhong Y, Peng Q, Qin C. Olive oil consumption and risk of cardiovascular disease and all-cause mortality: A meta-analysis of prospective cohort studies. Front Nutr. 2022;9:1014203. https://pmc.ncbi.nlm.nih.gov/articles/PMC9623257/ 8. Lichtenstein AH, et al. 2021 Dietary guidance to improve cardiovascular health: A scientific statement from the American Heart Association. Circulation. 2021;144:e472–e487. doi:10.1161/CIR.0000000000001031. https://www.ahajournals.org/doi/10.1161/CIR.0000000000001031

Global Evidence and Regional Adaptation of Mediterranean Dietary Pattern in NCD Prevention

Noncommunicable diseases (NCDs) are a major public health challenge in India with 59.1% of deaths due to NCDs, 53.5% from CVD, and over 101 million people living with T2DM. [1][2] Dietary transitions toward refined carbohydrates, added sugars, refined oils, trans fats, and processed foods are increasing cardiometabolic risk.[3][4] Adopting Mediterranean-style dietary patterns serves as a countermeasure. Specifically, incorporating olive oil as primary fat provides cardioprotection due to high MUFA and low SFA profile among cooking fats, improving lipid metabolism, oxidative stress and gut health.[5][6] Reference(s): 1. Sridhar K, Dhillon PK, Bowen L, Kinra S, Bharathi AV, Prabhakaran D, Reddy KS, Ebrahim S; Indian Migration Study Group. The association between a vegetarian diet and cardiovascular disease (CVD) risk factors in India: the Indian Migration Study. PLoS One. 2014;9(10):e110586. doi:10.1371/journal.pone.0110586. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0110586 2. Anjana RM, Unnikrishnan R, Deepa M, et al. Metabolic non communicable disease health report of India: the ICMR INDIAB national cross sectional study (ICMR INDIAB 17). Lancet Diabetes Endocrinol. 2023;11(7):474–489. doi:10.1016/s2213-8587(23)00119-5. https://linkinghub.elsevier.com/retrieve/pii/S2213-8587(23)00119-5 3. Khanna U, Shah H. Dietary patterns, habits, and the rising burden of noncommunicable diseases in India. Indian J Kidney Dis. 2025;4(2):39–42. doi:10.4103/ijkd.ijkd_17_25. https://journals.lww.com/ijkd/fulltext/2025/04000/dietary_patterns,_habits,_and_the_rising_burden_of.1.aspx 4. Dehghan M, Mente A, Zhang X, et al. Associations of fats and carbohydrate intake with cardiovascular disease and mortality in 18 countries from five continents (PURE): a prospective cohort study. Lancet. 2017;390(10107):2050–2062. doi:10.1016/S0140-6736(17)32252-3. https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(17)32252-3/abstract 5. Mazzochi A, Leone L, Agostoni C, et al. The Secrets of the Mediterranean Diet: Does [Only] Olive Oil Matter. Nutrients. 2019;11(12):2941. doi:10.3390/nu11122941. https://pmc.ncbi.nlm.nih.gov/articles/PMC6949890/ 6. Pant A, Chau DP, Magmas MA, Zaman S. Cardiovascular Disease and the Mediterranean Diet: Insights into Sex Specific Responses. Nutrients. 2024 Feb 19. doi:10.3390/nu16040570. https://pmc.ncbi.nlm.nih.gov/articles/PMC10893368/

Extra Virgin Olive Oil as an Anti-Inflammatory Intervention: Mechanisms and Clinical Evidence

Chronic inflammation is a central amplifier of cardiometabolic and cardiovascular disease, driving endothelial dysfunction, oxidative stress, and progressive vascular injury.[1] Dietary compounds influence these pathways, including bioactive polyphenols in extra virgin olive oil (EVOO) — such as hydroxytyrosol and oleuropein — alongside monounsaturated fatty acids (MUFAs), predominantly oleic acid. EVOO exerts anti-inflammatory and antioxidant effects by modulating inflammatory signalling pathways, immune cell activity, and endothelial responses, thereby reducing vascular damage. It represents a clinically relevant dietary strategy that complements medical nutrition therapy in cardiometabolic risk management.[2][3][4] Reference(s): 1. Higashi Y. Roles of oxidative stress and inflammation in vascular endothelial dysfunction-related disease. Antioxidants. 2022 Sep 30;11(10):1958. 2. Ghazali R. Olive oil Compounds: Biological and Chemical Actions for Health-An updated review. Food Chemistry Advances. 2026 Mar 10:101273. https://www.sciencedirect.com/science/article/pii/S2772753X26000560 3. Casas R, Estruch R, Sacanella E. The protective effects of extra virgin olive oil on immune-mediated inflammatory responses. Endocrine, Metabolic & Immune Disorders—Drug Targets. 2018;18(1):23-35. https://www.researchgate.net/profile/Rosa-Casas2/publication/321135121_The_Protective_Effects_of_Extra_Virgin_Olive_Oil_on_Immune-mediated_Inflammatory_Responses.pdf 4. Milena E, Maurizio M. Exploring the cardiovascular benefits of extra Virgin Olive oil: insights into mechanisms and therapeutic potential. Biomolecules. 2025 Feb 14;15(2):284. https://www.mdpi.com/2218-273X/15/2/284

Blood Sugar: Balance Starts in the Kitchen

With rising diabetes in India, sugar reduction alone is not enough-cooking oil choice matters. Olive oil, rich in MUFAs and phenolic compounds, may help prevent and manage type 2 diabetes by lowering glycemic load, reducing insulin secretion, and improving insulin sensitivity. Within a Mediterranean-style diet, EVOO improves glucose markers, inflammation and lipid levels. EVOO suits salads and light cooking, while high-smoke point olive oil variants fit Indian dishes such as curries, sabzi and parathas.