A new study from John Hopkins University reveals that if Americans continue with their bad habits concerning nutrition, 75% will be fat or overweight by 2015.

The healthy nutrients Americans get every day are scarce and come from only three types of plants (corn, soy and wheat) while indigenous hunters in Australia for example are enjoying the benefits of more than 800 healthy plants, according to reports from "Fourth Annual Nutrition and Health Conference" held in San Diego, Calif., May 14-16, 2007.

Other similar reports indicate that one in three Americans is getting 47 percent of his/her calories from junk foods. The average American is eating 300 more calories each day than he or she did in 1985. Added sweeteners account for 23 percent of those additional calories; added fats, 24 percent.

Vitamin D deficiency is widespread. The following health problems have been linked to vitamin D deficiency: type 1 and 2 diabetes; multiple sclerosis; rheumatoid arthritis, osteoarthritis, periodontal disease, increased susceptibility to infection; osteoporosis, low birth weight infants; low seizure threshold; cancers of the breast, prostate, colon, pancreas and ovary; non-Hodgkin's lymphoma; hypertension, myocardial infarction, stroke, congestive heart failure; wheezing in childhood, and compromised muscle strength and falls in the elderly.

In real dollars, the price of fresh fruits and vegetables has risen nearly 40 percent since 1985. In real dollars, the price of soft drinks has dropped 23 percent. The reason unhealthy foods tend to be less expensive on average than foods such as fresh fruits and vegetables has much to do with American farm policy.

Such bad alimentary habits have negative impact on Americans’ weight and researchers at John Hopkins University in Baltimore, who have examined and analyzed more than 20 studies and national surveys relating to weight and behavior, have come to the conclusion by 2015, 41 percent will be obese, while 34% will be overweight.

Studies show that 66% of U.S. adults were overweight or obese in 2003 and 2004. Among black women 40 or older, 50% are obese and 30% more are overweight.

Dr. Youfa Wang of the Johns Hopkins School of Public Health said that "obesity may increase risk of other chronic disease like coronary artery disease, type two diabetes, cardiovascular disease and hypertension. So people can put these together to think about the health consequence."

Lack of physical activities and unhealthy food will determine weight increase in 24% of children and teenagers by 2015. Women 20 to 34 were found to have the fastest rate of weight gains.