Developing an informational Instagram account is easy, but it needs frequent posting. The account is about health and this is required.
You can interact a lot with people by raising topics of interest to them and ask them about their opinion. By this, you will increase their interaction. Moreover, sponsored ads on some pictures increase the number of followers if you have a sufficient amount. Finally, you can communicate with people according to the region you are in, follow people who have similar interests, correspond with them, share information or give them advice.