Welcome to steemit!
You pose an interesting question. In my view, America's obesity problem has been systemically cultivated:

• A food pyramid that encourages grains and carbs.
• Subsidies for agribusiness, complete with hormone disrupting chemicals and gmos.
• Highest use of pharmaceuticals in animals (and people)
• American Heart Association claiming coconut oil (not generally sourced in America) as unhealthy.
• American Diabetes Association saying fat, not sugar, is main cause of diabetes.
• Putting fluoride in our drinking water.
• Funding drug research through universities, and making natural remedies suspect - even illegal.

Here are some of my other posts:

Gut Biome and Birthday Cake

Safe Drinking Water?

Partially Torn ACL - Health Care Cost

Latin America most happy - US ranks 38th

Ethereum's Ups and Downs

Did the FDA do something right? Proposal to reduce opioids with alternative pain therapy like acupuncture

Gets rid of Zits, Cold Sores, Scars, and Wrinkles. Sleep Sounder. Light Therapy.

Plastic Bag use Dropped 85%

Don't know how to cook with turmeric?

Fasting -- more time on Steemit

My New Favorite Thing

How to Make a List Like This!