Answer to Question 1
If a site's URL ends in .edu or .gov it is probably a reliable site. If the site is not selling something, this is also a good sign. If the people who sponsor the site are open about their credentials, such as their being medical doctors or registered dieticians, then the site is likely more credible. A site sponsored by a pharmaceutical company may be prone to promote their drugs or treatments and may be biased. Links provided in the site should also be credible, and current information is likely preferable to older information.
Answer to Question 2
TRUE