This post is gluten-free.
Consider the following:
A seven month-old baby in Belgium died from malnutrition after his parents put him on an alternative gluten-free diet despite no actual medical diagnosis or recommendation. The child weighed only 9 pounds, about half the size of an average child his age, and was extremely dehydrated. The story brings to light just how dangerous alternative diets can be for very young children.
The baby, identified only as “Lucas” by The Daily Mail, was raised on a gluten-free diet consisting of quinoa milk, rice milk, oat milk, and other alternative milk products. Upon noticing their child’s diminishing health—the boy was described as extremely thin and “gasping for air”—his parents, named only as Peter S and Sandrina V, took him to visit a homeopathic doctor. The homeopath however immediately sent the family to a hospital.
(full article here: Baby Dies of Malnutrition).
And some people still don’t believe in natural selection. I think that’s proof in itself of natural selection.