It is very common to hear and see companies use anecdotes and their cousin, testimonials, to support their claim of a product or service. By using emotional appeal, people have a tendency to fall for such claims without verifying their legitimacy. Because anecdotes are intrinsic to bias, this is one of the reasons why they are mostly fiction like memory.
In fitness, nutrition, massage therapy, and even in physical therapy, it is essential that practitioners and clients must do a little homework before accepting if claim. Even if a treatment works, clients and patients sometimes do not recall specifically their experience or the information given by their practitioner.
In this article, I highlight a research and a few examples on why anecdotes are unreliable evidence to support a claim.