Based on the information in the paragraph from the website, what is the author's level of expertise on the topic of eating healthy after a heart attack?

The author's credentials give him a moderate amount of expertise on the topic, but you would want to learn more before using him as a source.

The author's credentials give him a low level of expertise on the topic, and he is unlikely to be a good source of information.

The author's credentials give him a high level of expertise on the topic.