Extra-Virgin Olive Oil Improves Depression Symptoms Without Affecting Salivary Cortisol and Brain-Derived Neurotrophic Factor in Patients With Major Depression: A Double-Blind Randomized Controlled Trial
Foshati S, Ghanizadeh A, Akhlaghi M
Journal of the Academy of Nutrition and Dietetics · 14 citas
Cómo se estudió
- Diseño
- Ensayo controlado aleatorizado (indexado por PubMed)
- Estudiado en
- Personas
- Resultado principal
- Marcadores de salud y funcionamiento
- Consumo medido con
- No se indica
Quién lo pagó
- Financiación
- Financiación independiente
- Universidad u hospital
- Shiraz University of Medical Sciences
- Subvenciones
- Shiraz University of Medical Sciences (94-01-84-9923)
Según 1 financiador declarado.
Publicación
- Publicado
- 2021-08-03 · J Acad Nutr Diet · vol. 122 · número 2 · págs. 284–297.e1
- Editorial
- Elsevier BV
- Citado
- 23 citas · más que el 83% de estudios similares · 1.7× el promedio de su campo
- Referencias
- 80 trabajos
- Acceso
- De pago
- Áreas de investigación
- Treatment of Major Depression · Fatty Acid Research and Health · Medicinal Plant Extracts Effects
- Palabras clave
- extra virgin olive oil, major depressive disorder, depressive symptoms, salivary cortisol, cortisol awakening response, brain-derived neurotrophic factor, antidepressant effects, dietary intervention, complementary therapy, sunflower oil, depression severity, depression biomarkers, Beck Depression Inventory-II, Hamilton Depression Rating Scale
- MeSH
- saliva, humans, hydrocortisone, brain-derived neurotrophic factor, treatment outcome, double-blind method, adult, iran, female, male, olive oil, sunflower oil, major depressive disorder
3 autores
- Sahar Foshati🇮🇷Shiraz University of Medical Sciences
- Ahmad Javid Ghanizadeh🇺🇸🇮🇷University of California, Los Angeles; Shiraz University; Shiraz University of Medical Sciences; Kern Medical Center
- Masoumeh Akhlaghi🇮🇷 · autor de correspondenciaShiraz University of Medical Sciences
Resumen
El texto original del estudio, en el idioma en que se publicó.
Background
Many patients with depression are reluctant to take psychiatric medications. Hence, complementary therapies such as nutritional considerations could be advantageous. The antidepressant potential of olive oil has been proved in observational studies.
Objective
The effect of extra-virgin olive oil (EVOO) on depression symptoms and cortisol and brain-derived neurotrophic factor (BDNF) levels in patients with depression was examined.
Design and participants
This was a double-blind randomized controlled trial conducted on 73 patients suffering from major depressive disorder in Shiraz, Iran, in 2016.
Intervention
The patients were randomly assigned to intervention (EVOO) and control (sunflower oil) groups and consumed 25 mL/d of the corresponding oil for 52 days.
Main outcome measures
Depression symptoms were assessed by Beck Depression Inventory-II (BDI-II) and 7-item Hamilton Depression Rating Scale (HAMD-7). Salivary cortisol levels were determined immediately after awakening and 30 minutes later. Cortisol awakening response and the area under the curve with respect to ground and increase were computed. Serum BDNF concentrations were also measured.
Statistical analyses performed
Statistical analysis was conducted based on intention-to-treat and per-protocol approaches. Within-group changes were examined with repeated measures (for BDI-II and HAMD-7) and with paired t test (for other variables). Between-group comparisons were performed with analysis of covariance after adjustment for confounding factors.
Results
In intention-to-treat analysis, HAMD-7 score was the only variable with significant changes within and between groups, the latter as a greater decline in EVOO group (P = .001). BDI-II score did not show significant change in either group but the between-group comparison revealed a significant difference (P = .021). EVOO showed antidepressant effect in severely depressed patients (P = .017 for BDI-II and 0.008 for HAMD-7) but not in mild/moderate depression category. Serum BDNF concentrations, salivary cortisol levels at immediately after awakening (T0) and 30 minutes later, cortisol awakening response, the area under the curve with respect to ground and increase did not change within or between groups. Results of per-protocol analysis were not different.
Conclusions
The results of this study suggested beneficial effects of EVOO on depression symptoms in patients with severe depression but not in those with mild to moderate depression. The effects were significant from both statistical and clinical points of view.
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