The diagnostic term for beri/beri refers to <u>body weakness "weakness/weakness"</u> and is caused by the lack of thiamine (part of B complex: B-1) in the diet. Beri/beri typically attacks/damages the nerves and can further lead to loss of strength of muscles or worse case - paralysis.
Nuts indeed are a good source of vitamin E. This is true. However, when talking about nuts we have to consider that not all nuts have the same nutritional information nor do all of them have plenty of vitamin E. While we can say this for most, it is necessary to be wary of making such statements.
It could have the most direct effect on the amount of mitochondria in cells and also the system of the membrane.