"The homocysteine in animal flesh becomes
amyloid plaque which lines the brain arteries and causes Alzheimer's."
A better explanation is that mercury fouls up many enzymes such as methionine synthase--MS in the diagram below. This fouls up conversion of homocysteine to methionine. http://mercuryandmore.weebly.com/methylation-figure.html
People may also be lacking in magnesium (Mg), vitamin B6 (P5P), iron (Fe), glutamine, glycine, vitamin C and molybdenum (Mo) as seen in the diagram.
Boyd Haley former chair of the chem dept at the U of KY says the 3 major indicators of Alzheimer's can be recreated in the lab by introducing mercury. This includes the amyloid plaque, and neurotangles seen in the Calgary video. https://www.youtube.com/watch?v=3B-qo818GXM&list=PLF4585FDD89038ACE