The path to enlightenment, or the practice of meditation, has biological consequences to the practitioner, as measured by brain and body chemistry. .....and brain electrical output. Lots of research has established that phenomenon and I won't rehash all of that.
Also, I believe that there are inductive changes in the energy fields of people surrounding realized beings, leading to unconscious learning and biological changes as well. This is where the teacher teaches without teaching. This phenomenon is also called transmission. Regarding remote influencing of people's biology by masters, Lynne McTaggert has written a book documenting much of that research called The Field.