In Google Adwords bid to cull advertising they consider undesirable, many good advertisers have also been hit, and have had their business shut down because they can't find any new source of customers.
2 common areas that are quickly shut down by Adwords are the "make money" websites that try to advertise on Adwords.
An Ad that says "Make $5000 a month" is almost certainly shut down by the Google Bot. A manual review may take place which confirms that decision.
That manual review is usually done by someone from India. Inferred by an Indian name at bottom of every Suspension email.
Weight loss landers, are very easily fall prey to the google adwords bot as well. Certain words on the lander that give the Bot cause that weight loss is too "fantastic or quick" gets an account permanently suspended. A manual review from india may or may not help. Even if you are a legitimate weight loss website with a brick and motar business, your website can still be prohibited from every advertising on Google Adwords once the suspension review is determined final by the Indian vetting center.
If you are a weight loss center, my suggestion is not to rely on Adwords for your business marketing, diversify to classified Ads, radio and other advertising medium.