Upon what do they base the UL of 10mg/d? Probably not based on what it would do to your odds of getting Alzheimers or various other conditions you'd rather not have. There's also a difference between the form of dietary copper and the form of most supplemental copper. It's possible that someone with a really crappy diet could benefit from a small amount of supplemental copper, but I prefer to eat a good diet and skip the supplemental form. It's not very hard to find multivitamins with more copper than even a person with a bad diet might need. A lot of people get various amounts of copper from their water supply, due to the large installed base of copper plumbing.
"Researchers at The Birchall Centre at Keele University in the UK released research in February that provided “unequivocal” evidence that copper protects the human brain against damage from beta amyloid. They also said it’s “highly unlikely” that copper is responsible for the formation of brain plaques."
http://www.healthlin...zheimers-081913
A better way to test than shooting copper into mice is to find areas with high copper content in the groundwater and epidemiologically evaluate the % of alzheimers in that population vs population as a whole.
Then there is Menke's Disease -- where copper cannot cross the blood brain barrier into the brain -- death by age 3.
"Unequivocal" is pretty strong language as the takehome from an in vitro experiment. In vitro work is frequently if not usually irrelevant to the human case; It's not something that you would want to base clinical decisions on. That is particularly true in this case, where there is so much countervailing evidence that excess copper is harmful. (As is pointed out in that very link)
Menke's Disease lets us know that the U-shaped curve is alive and well. (For any essential nutrient, a plot of "bad outcome" vs. consumption or biological concentration will be shaped like the letter 'U'.)
You may want to look at this and this, and references therein.
"Four classes of etiologic agents can produce toxic, hereditary, infectious and deficiency diseases. Recent research on Alzheimer's disease generally addresses pathogenesis related to the first three classes of agents with little emphasis on cause. Low copper and cytochrome oxidase in Alzheimer brain can be attributed to low copper intakes or higher than average nutritional requirements. Experiments with animals deficient in copper involving amyloid, ceruloplasmin, copper transport, cytochrome oxidase, myelination, organ analysis and oxidative defense are consonant. Decreased cognition and increased tau in cerebrospinal fluid in Alzheimer's disease also are associated with low copper status. A high requirement for copper may explain early onset of Alzheimer's disease in Down's syndrome. Copper deficiency is a plausible cause of Alzheimer's disease. This hypothesis should be tested with a lengthy trial of copper supplementation."
http://www.ncbi.nlm....pubmed/17928161
As seen by evidence showing low copper states are associated with worse cognition in Alzheimers, and also zinc deficiency; a likely contributing factor in AL-D is faulty enzymatic production and/or out of balance Zn-Cu. This results in low levels of SOD, leaving the brain unable to handle oxidative stress.
Couple that with low ascorbate, and you have multiple deficiencies that lead to issues with Zn-Cu complex synthesis as well as clearance of neurofibbrilary tangles and exess metals (of all kinds).
Ascorbate dissolves amyloid plaques
http://www.scienceda...10818101645.htm
"When we treated brain tissue from mice suffering from Alzheimer's disease with vitamin C, we could see that the toxic protein aggregates were dissolved. Our results show a previously unknown model for how vitamin C affects the amyloid plaques,"
Furthermore Ascorbic acid chelates metals -- and increases clearance from the body.
Edited by sensei, 29 December 2014 - 06:16 PM.