Phasing in is a process in that is involved in living healthy.
Phasing in is the introduction of regimens such as exercises, eating healthy using a nutrition or dietary guide, maintenance of blood pressure level e.t.c.
Phasing in is done in phases or stages i.e. over a stipulated period of time.
Tadpoles start off having gills like a fish but the older they get there gills start to disappear they breathe like fish because they do have gills as younglings.
