Maria explains that she learned about the effects of coconut oil on the internet, while reading an online article about a well-known movie star who claims it him lower his bad cholesterol. what are these types of testimonials called?

anecdotes

Explanation:

When evidence of a particular incidence is collected from some personal incidence narrated/provided by a person, usually casually or informally with no other evidence except personal testimony, such testimony is known as an anecdote. In the given example, Maria is learning about the effects of coconut oil only based on an online article which describes the personal experience of a movie star of using the oil to lower the bad cholesterol. The article provides no further evidence regarding the fact the oil is good except that of the experience of the movie star and hence, the given testimony is an anecdote.