The concerns about meaningful decline are also essentially fake / bullshit https://www.sciencedirect.com/science/article/pii/S088915751....

EDIT: Also being worried about nutrient deficiency on a modern balanced Western diet is also basically deranged and wildly out of touch with the evidence. There are some interesting exceptions for women and iron, to some degree vitamin C (easily solved), and then some serious B12 issues in vegans, but, otherwise, vitamin deficiency is basically a non-problem in the developed world.