70 years is a long time without food. So that part of the claim on whether it is true or false can be a separate debate.

My curiosity has been aroused by the other side of the story. If you actually read the whole story (more than what is just here in sajha), Indian military scientists had this yogi under scientific observation for 15 days during which the yogi didn't eat or drink, although he is said to have come into contact with water during his (frequent? I think one story said, "yes, frequent!") bath and gargled. His vital processes didn't even budge a bit.  And these scientists are the same guys who successfully landed a water mapping satellite on the moon may be a year or so ago. 

I hope they will soon publicize their findings of the 15 days and we get to go through the data collected! There has to be an energy source that the yogi is utilizing and the data will tell us if the CCTV monitoring the yogi was dysfunctional for short period of time, may be each day!