Some scammers are setting up fake news sites, displaying logos of legitimate news organizations to promote all kinds of scams, including the Acai Supplement scam. They post a 'true-life' experience-based report from a 'reporter' about his or her dramatic weight loss as a result of using the products they are promoting. The truth is, the site is in no way affiliated with any legitimate news reporting organization.
One way you can check to see if a site is likely to be ligitmate is to check the 'WHOIS' database (see below) to see who the site is registered to. If the scammers have not marked the site 'Private', you will see the name, address and email contact information they used to register the site. It will be obvious that it is not information from a legitimate news source.
A couple of additional clues are that news organizations very rarely actually endorse products. It would affect their objectivity. Also, if the claim sounds too good to be true....
To check the WHOIS database, click here. Type in the URL of the website you want to research. A page will come up that says, 'This website is taken. You can view the WHOIS.' Click on 'WHOIS' to see who the site is actually registered to.