1. CROP NUTRIENT LOSSES BECAUSE: 
  • intensive farming
  • crop rotation is no longer done
  • our land is not resting
  • after the Second World War in order to deal with the increasing number of children (baby-boomer generation ) NPK fertilizer was authorized (nitrogen, phosphorus and potassium)
  • tropical fruits are coming from thousands of miles (in tropical countries) where they are picked green and forced to ripen on the road​
​2. DIGESTION PROBLEMS :
  • gas
  • bloating
  • heartburn
  • problems with pancreas, liver, gall bladder, intestine or colon are LIMITING NUTRIENT ABSORPTION due mainly to digestive tract inflammation or inability to digest.
​3. OVER-COOKED MEALS: 
  • boiling
  • roasting
  • use of oven at very high temperatures destroys what remains of the vitamins and minerals.
​4. FOOD STORAGE:  usually remain in trucks, warehouses, on shelves, in refrigerators and freezers from a few days to several weeks, and vitamins and minerals are very sensitive to temperature changes.
5. FOOD SELECTION: 
  • some of us are allergic to certain foods
  • others do not tolerate them or keep eating by different regimes
  • some are vegetarians, others carnivorous ...
Despite all the above mentioned, what is clear is that the body needs 47 ESSENTIALS NUTRIMENTS a day and chances are that it doesn't obtain them. Increasing the possibility of becoming more and more deficient, and the physical manifestations will only appear 5 to 10 years later.
6. ENVIRONMETAL FACTORS:  
  • herbicides, pesticides that kill not only insects and herbs, but the vitamins as well.
  • heavy metals (mercury, cadmium, lead, arsenic, etc)
  • PCBs (polychlorinated biphenyls)
  • organic residues

FORE MORE DETAILS, VISIT OUR PAGE: 
Nutritive value of fruits and vegetables
7. REPEATED ANTIBIOTIC THERAPY OR OVERPRESCRIBED DRUGS interfere with the intake of essential nutrients
8. LIFESTYLE:
  • SMOKING
  • ALCOHOL
  • COFEE INTAKE
  • DRUGS
  • ENERGY DRINKS
9. STRESS
​10. CHRONIC SLEEP DEPRIVATION
11. CHRONIC ILLNESS 
When the body suffers from any illness, his fight against the changes are more and more intensive, which increases the need for vitamins and minerals.
12. ALL ARTIFICIAL PRESERVATIVES AND DYES are destroying vitamins in food.
13. FOOD IRRADIATION

Since 2002, American Medical Association Acknowledges the Role of Vitamins for Chronic Disease Prevention in Adults
http://www.mreassociates.org/pages/ama_speaks_out.html
Harvard medical school - A daily multivitamin is a great nutrition insurance policy. Some extra vitamin D may add an extra health boost.
http://www.hsph.harvard.edu/nutritionsource/what-should-you-eat/pyramid/