From what I read, a lot of older people will get these ridges naturally, but I think those of us with heavy mercury loads will get them way before we might have without such a load. Mercury seems to cause maldistribution or malabsorption of different elements.

I looked back over a hair test result, and for me manganese was low. One of the symptoms of this concerns "slow growth of fingernails and hair" so I think something is connected there.

That is a great idea to observe fingernails on various people you meet! See if people who have a lot of silver fillings and other dental work show Mees' Lines or other abnormalities. If anyone does this, please report back in and let us know.

One point, I think, is that some people who have lots will not show poor fingernails unless they have been in a long time, and are poor excretors - mine were fine until a year or two ago, and some people who are better excretors of mercury (unlike us APOE-E4s - I am guessing, I have not been tested) may not show signs.

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TW