Alzheimer's disease (AD) risk increases with age and lacks efficacious pharmacological options. Summaries of the existing evidence reveal an association between Mediterranean-style diet adherence and reduced AD incidence; however, no review has investigated this relationship with respect to the hallmark AD biomarkers (tau and beta-amyloid) that manifest decades before clinical symptomatology. MEDLINE, PubMed, PsycINFO, Google Scholar, and SCOPUS databases were systematically searched to identify peer-reviewed articles investigating diet and AD biomarkers in the last 2 decades. Two thousand seven hundred twenty-six records were extracted, quality assessed, and double-blind screened by 2 authors. Fifteen studies met the inclusion criteria and 13 studies found a significant relationship. Of these, 4 studies found a high-glycemic load was related to an increase in AD biomarker burden; 6 found adherence to a Mediterranean or "AD-protective" dietary pattern conferred a reduction in AD biomarker burden. Meta-analysis revealed a small but significant effect of diet on AD biomarkers (β = 0.11 [95% CI 0.04-0.17], p = 0.002). This systematic review supports the notion that diet and nutrition display potential for nonpharmacological AD prevention.

Item Type:	Refereed Article
Keywords:	Alzheimer's disease, beta-amyloid, biomarkers, diet, nutrition, Tau
Research Division:	Biomedical and Clinical Sciences
Research Group:	Nutrition and dietetics
Research Field:	Nutrition and dietetics not elsewhere classified
Objective Division:	Health
Objective Group:	Public health (excl. specific population health)
Objective Field:	Nutrition
UTAS Author:	Hill, E (Dr Edward Hill)
ID Code:	134900
Year Published:	2019
Web of Science® Times Cited:	21
Deposited By:	Menzies Institute for Medical Research
Deposited On:	2019-09-11
Last Modified:	2019-10-16
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