Nickel sensitivity leading to allergy is reported to be on the rise, although the common cause for this is attributed to jewellery rather than diet. One theory around diet-induced nickel allergy is that people are eating more whole, unprocessed foods, which includes more plants grown in soils that naturally contain nickel.
I’m a bit cautious about drawing health conclusions on the basis of ideas around the evolution of the human body. I think paleo is the foremost proponent of a diet based on this theory, but regardless of diet type, whether we achieve a positive or negative health outcome is ultimately going to depend on the actual application of the diet from a nutritional standpoint. From this perspective, there are any number of diet types that can be beneficial. Alternatively, relying on non-nutrition-based ideas can have some negative outcomes.
So what is the nutritional perspective here? Is the argument that people with nickel sensitivity can’t assume a healthy plant based diet? Is the argument generally against higher consumption of “soy, pulses, beans and wholegrains”, and if so, why does this warning target only vegan diets and not also other diet types that encourage higher consumptions of wholefoods or grains? If we accept the argument against eating wholefoods, are their potentially other health concerns beyond nickel allergy that come into play?