Question: what are some of the main causes of obesity in america?
Answer: Genetics. Obesity has a strong genetic component. ... 
Engineered Junk Foods. Heavily processed foods are often little more than refined ingredients mixed with additives. ... 
Food Addiction. ... 
Aggressive Marketing. ... 
Insulin. ... 
Certain Medications. ... 
Leptin Resistance. ... 
Food Availability.