Ask them how many years experience they have working in the area that you’re looking for help in, to start. For example, bloating and women’s health is 99% of my work, so I may be able to best connect-the-dots on that one little nuance a client tells me about when describing their symptoms compared to someone who doesn’t research or deal with the topic of bloating day in and day out:
Location of the bloating (high, centred, low, all around), how it feels (sharp, dull, tight), when it comes on, after what foods, and what the size, frequency and colour of their poops look like all can hold the key to the issue (or issues) that are occurring, and thus how to best approach them via nutrition and/or other evidence-based measures to alleviate symptoms.