Many dietary experts now question the wisdom of isolating single nutrients from the usual company they keep in foods.

If you're taking large amounts of single nutrients," Dr. Marriott said, "that's cause for concern.

However, no single nutrient can replace eating fruits and vegetables.

As for single nutrients, stores of sodium, potassium, magnesium, and some B vitamins may also be reduced after strenuous exercise.

Impairment can be of single or multiple nutrients depending on the abnormality.

That is, it has to provide the child with every single nutrient a child needs in exactly the right proportions.

Overall, no single nutrient has been found to reduce the risk of cancer.

Previous studies that tested the ability of single nutrients to reduce high blood pressure have yielded contradictory results.

Even a mild deficiency of any single nutrient can greatly disrupt important functions.

The evidence is pretty clear that foods work, but single nutrients don't.