Well, since the 50s studies have been done and have shown nutrients in soil have dropped between 30 and 60% it thus is obvious the same will have happened in the crop growing in them.
In the Journal of the American College of Nutrition. They studied U.S. Department of Agriculture nutritional data from both 1950 and 1999 for 43 different vegetables and fruits, finding “reliable declines” in the amount of protein, calcium, phosphorus, iron, riboflavin (vitamin B2) and vitamin C over the past half century.
There have likely been declines in other nutrients, too, he said, such as magnesium, zinc and vitamins B-6 and E, but they were not studied in 1950 and more research is needed to find out how much less we are getting of these key vitamins and minerals.
A Kushi Institute analysis of nutrient data from 1975 to 1997 found that average calcium levels in 12 fresh vegetables dropped 27 percent; iron levels 37 percent; vitamin A levels 21 percent, and vitamin C levels 30 percent. A similar study of British nutrient data from 1930 to 1980, published in the British Food Journal,found that in 20 vegetables the average calcium content had declined 19 percent; iron 22 percent; and potassium 14 percent. Yet another study concluded that one would have to eat eight oranges today to derive the same amount of Vitamin A as our grandparents would have gotten from one.
Take home note is that taking a multivitamin ensures you get everything your body needs, especially if pushing it hard for muscle growth – everything needs to be optimum.
We use Animal Pak, for its vitamins, minerals, digestive aids and indeed a few key aminos.
In Team Wild’s view?  Well worth the use for optimum muscle growth and of course, optimum healh.