A high-glycemic diet is associated with cerebral amyloid burden in cognitively normal older adults

You'll have to DEMAND your doctor give you a diet protocol rather than having to guess on your own.
https://www.mdlinx.com/internal-medicine/medical-news-article/2017/10/27/alzheimer-s-disease-amyloid-pet-imaging/7479281/?rcid=14&inrc=0

American Journal of Clinical Nutrition | October 27, 2017

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Taylor MK, et al. - Cross-sectional analyses were performed to evaluate the association of dietary glycemic measures with the cerebral amyloid burden and cognitive performance in cognitively normal older adults. The researchers found an association between high-glycemic diet and greater cerebral amyloid burden, which suggested diet as a potential modifiable behavior for cerebral amyloid accumulation and subsequent Alzheimer's disease risk.