Ya if he is lucky, or kidney failure, colon cancer and heart disease if not...All good Perry. But supplement with fibre ( fruits or veggies or flax/chia etc)..else you will get constipation.
This fad diet is one of the more medically dangerous ones of recent years. It's also marketed based on half truths, an inaccurate understanding of evolution, and is also backed by some pretty nasty underlying anti feminist philosophy. For those who are interested, see below.
As with most things in life, beware of people offering quick fixes.
Take short cuts, get cut short.