**2. Materials and methods**

This paper consists of two analytical frameworks. First, we reviewed the historical documents, articles, and relevant policy documents in order to capture status and trends of issues of honey production from bees.

As second phase of analysis, we conducted e-DNA analysis to identify the nectar source of honey produced by the authors and compared them with those products sold in the supermarket.

We extracted the DNA according to the method of Hawkins et al. [9] and amplified the DNA using the ITS-p3/ITS-u4 primer pair [10]. Then, the DNA metabarcoding of the plant contained in honey was implemented using the next-generation sequencer MiSeq.
