because prevention is better than cure.

because prevention is better than cure.

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Fish Consumption and Depression (2016)

A sample of 2,034 individuals (age >55) in Singapore were studied to explore the link between fish consumption and depression. The study was conducted as part of the Singapore Longitudinal Aging Studies (SLAS) project and results were adjusted for all other possible factors such as smoking, exercise, diabetes etc.

Individuals consuming fish three times per week were observed to report lower depressive symptoms, compared with those who did not consume fish. 

The abstract can be accessed here

Wu D., Feng L., Gao Q., Li J.L., Rajendran K.S., Wong J.C., Kua E.H., Ng T.P. Association between fish intake and depressive symptoms among community-living older Chinese adults in Singapore: A cross-sectional study. J. Nutr. Health Aging. 2016;20:404–407.exercise, diabetes etc

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Nutritional Status of Older Adults and Health (2017)

This study looked at the correlation between nutritional status of older adults and health. Correlation was observed between quality of nutritional status and depressive symptoms. Elderly individuals who perceived that they had poorer health, were also observed to be at higher risk of depression.

The full text can be accessed here

Jung, S. E., Bishop, A. J., Kim, M., Hermann, J., Kim, G., & Lawrence, J. (2017). Nutritional Status of Rural Older Adults Is Linked to Physical and Emotional Health. Journal of the Academy of Nutrition and Dietetics, 117(6)

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Tryptophan & Emotional Processing (2006)

This study assessed  tryptophan & emotional processing. It explored whether tryptophan (TRP) induces cognitive changes opposite to the negative biases found in depression and characteristic of those induced by serotonergic antidepressants in healthy volunteers. Thirty eight healthy volunteers were randomised to receive 14 days double-blind intervention with TRP (1g for 3x a day) or placebo. On the final day, emotional processing was assessed using four tasks: facial expression recognition, emotion-potentiated startle, attentional probe and emotional categorisation and memory. The results showed that TRP increased the recognition of happy facial expressions and decreased the recognition of disgusted facial expressions in female, but not male, volunteers. TRP also reduced attentional vigilance towards negative words and decreased baseline startle responsivity in the females. It concludes that these findings provide evidence that TRP supplementation in women induces a positive bias in the processing of emotional material that is reminiscent of the actions of serotonergic antidepressants. This highlights a key role for serotonin in emotional processing and lends support to the use of TRP as a nutritional supplement in people with mild depression or for prevention in those at risk.

Murphy SE et al. ‘Tryptophan supplementation induces a positive bias in the processing of emotional material in healthy female volunteers’. Psychopharmacology (Berl). 2006 Jul;187(1):121-30. Epub 2006 May 4

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Breakfast & Cognition (2006)

This study examined the relationship between consumption of breakfast  & cognition. Subjects included 7,343 10th grade students from Oslo, Norway who completed a questionnaire assessing these variables. The main finding from this study was that eating breakfast regularly is associated with less mental distress and improved academic performance. The association was stronger for boys, than girls.

Lien, L., ‘Is breakfast consumption related to mental distress and academic performance in adolescents?’, Public Health Nutrition, 10(4), 422-428, 2006 July

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Folate & Depression (2004)

This review explored folate & depression. A review of all randomized controlled trials that compared treatment with folic acid or 5′-methyltetrahydrofolic acid to an alternative treatment, for patients with depression. Three randomized trials (247 participants) were included. Two studies assessed the use of folate in addition to other treatment, and found that adding folate reduced Hamilton Depression Rating Scale (HDRS) scores on average by a further 2.65 points [95% confidence interval (CI) 0.38-4.93]. The remaining study found no significant difference when folate alone was compared with trazodone. The limited available evidence suggests folate may have a potential role as a supplement to for depression. It is currently unclear if this is the case both for people with normal folate levels, and for those with folate deficiency.

M J Taylor, ‘Folate for depressive disorders: systematic review and meta-analysis of randomized controlled trials.’, J Psychopharmacol., 18(2):251-6, 2004

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Vitamins, Minerals & Mood (2007)

This study investigated vitamins, minerals & mood. 225 hospitalised acutely ill elderly people were either given a normal hospital diet plus multivitamin and mineral supplements (providing 100 per cent of the Reference Nutrient Intakes for a healthy older person for vitamins and minerals), or a normal hospital diet plus a placebo for six weeks. Measures of mood and mental agility were taken at the start, at six weeks and six months later. There were significant differences in symptoms of depression scores in the supplement group compared with the placebo group at 6 months. This effect was seen in all patient groups including those with no symptoms of depression, mild depression and those with severe depression.

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Gariballa S and Forster S, ‘Effects of dietary supplements on depressive symptoms in older patients: A randomised double-blind placebo-controlled trial.’  Clin Nutr. 2007 Jul 25

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Iron & Depression (2007)

This study investigated iron & depression. Two hundred women who were not anaemic had their mood and blood iron levels measured. The iron levels in the women who were rated as depressed (67) were significantly lower than in the healthy controls (125).

M Vahdat Shariatpanaahi et al., ‘The relationship between depression and serum ferritin level’, European Journal of Clinical Nutrition, 61; 532-535, 2007

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Fish Oil & Depression (2011)

This study investigated fish oil & depression. Moderate dose of Omega-3 fish oil was observed to improve mood in depressed elderly. In this small randomised controlled trial, a group of elderly people with mild to moderate depression were given either a fish oil capsule (with 300mg of the omega-3 essential fats EPA and DHA) or a placebo for six months. The researchers found that intervention with the fish oil was clinically effective.

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Tajalizadekhoob, Y., Sharifi, F., Fakhrzadeh, H., Mirarefin, M., Ghaderpanahi, M., Badamchizade, Z., & Azimipour, S. (2011). The effect of low-dose omega 3 fatty acids on the treatment of mild to moderate depression in the elderly: a double-blind, randomized, placebo-controlled study. European archives of psychiatry and clinical neuroscience261(8), 539–549. https://doi.org/10.1007/s00406-011-0191-9
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Depression & Processed Foods (2009)

This study investigated depression & processed foods. Eating a diet high in processed food increases the risk of depression, according to a recent study.  Data on diet among 3,500 middle-aged civil servants was compared with self reported depression five years later. Those in the ‘whole food’ (plenty of vegetables, fruit and fish) group had a lower risk of depression compared with those who had a high consumption of processed foods, the University College London team found.  The team said the study was the first to look at the UK diet and depression.

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Akbaraly, T. N., Brunner, E. J., Ferrie, J. E., Marmot, M. G., Kivimaki, M., & Singh-Manoux, A. (2009). Dietary pattern and depressive symptoms in middle age. The British journal of psychiatry : the journal of mental science195(5), 408–413. https://doi.org/10.1192/bjp.bp.108.058925

 

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Microbiome, Anxiety & Depression (2011)

This study investigated the microbiome, anxiety & depression. It is understood that there is constant communication between the gut and the brain (the gut-brain axis). In this study, mice were fed a strain of probiotic (gut bacteria) or placebo. The mice who received the probiotics showed significantly fewer stress, anxiety and depression-related behaviours than the unsupplemented mice (controls).  Not only was their behaviour different, but their levels of stress hormones were lower too. The researchers also observed altered GABA activity in the brains of the supplemented mice, suggesting a direct effect on brain chemistry.

Bravo JA, Forsythe P, Chew MV, Escaravage E, Savignac HM, Dinan TG, Bienenstock J, Cryan JF. (2011) Ingestion of Lactobacillus strain regulates emotional behavior and central GABA receptor expression in a mouse via the vagus nerve. Proc Natl Acad Sci U S A. Aug 29. [Epub ahead of print]

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