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Veggie Nutrition Losses Over 30 Year Period

The Healing Power of Minerals, Special Nutrients and Trace Elements by Paul Bergner includes USDA figures that show a decline in mineral and vitamin content of several fruits and vegetables between 1914, 1963, and 1992.  Table 1 is a summary of mineral decreases in fruits and vegetables over a 30-year period, adapted from Bergner’s book.

Table 1.  Average changes in the mineral content of some fruits and vegetables†, 1963-1992

Mineral                          Average % Change

Calcium                                -29.82
Iron                                      -32.00
Magnesium                           -21.08
Phosphorus                          -11.09
Potassium                             -6.48

† Fruits and vegetables measured:  oranges, apples, bananas, carrots, potatoes, corn, tomatoes, celery, romaine lettuce, broccoli, iceberg lettuce, collard greens, and chard.   Source