Diet Doc offers new hCG diet plans, each closely tailored around every patient’s individual dietary needs, now understood to be the most effective method to produce fast weight loss. In a recent news report from the USDA, investigations are being conducted by researchers who are trying to establish a link between weight gain and the ability of subjects to make good dietary decisions, concerning mostly poor food choices. Another important topic of study is the already established connection between raised levels of cortisol and weight gain. The USDA reports "In one investigation, 29 obese but otherwise healthy women age 20 to 45 participated in a 12-week weight-loss regimen. The researchers assessed several factors related to weight management, including the volunteers' patterns of decision making, and changes in their levels of cortisol, a stress-associated hormone." This research is drawing important parallels between weight management and weight gain, and the ability to control one's eating habits.