This is not to suggest that Meridian Health Protocol Review vitamin C intake should be restricted, because the health benefits of this nutrient are far too powerful for that. But it is yet another example of the body's holistic functioning; meaning that it is rarely if ever a good idea to supplement with high doses of a single nutrient, and that attention needs always to be paid to obtaining a balanced and comprehensive supplementation programme.
A wide variety of foods are useful sources of dietary copper, but the problem is that the richest ones, liver and shellfish particularly, are foods which not everyone finds easily palatable or accessible. Nuts and pulses, whole-grain cereals and green vegetables may also provide a certain amount, but levels have been badly affected by the demineralisation of farm soils. A further problem is that dietary copper is often poorly absorbed, particularly when the diet is high in refined carbohydrates or artificial sweeteners.
The risks of copper toxicity appear to be low, although prolonged high doses may sometimes give rise to liver problems. The US Food and Nutrition Board has therefore prescribed an upper safe limit of 10 mg per day for copper consumption. Some authorities, however, argue that the potential pro-oxidant action of copper, and its interaction with other vital minerals, particularly zinc, makes this limit too high for safety; and certainly for optimal health.
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