We normally lose 50 - 100
hair strands per day. If there is more
hair loss than this, the first cause we look at is
diet. It has been long known that anorexia causes hair loss. Your 400 calories on alternate days is flirting with an anorexia-like diet and is most likely stressing your body. Rather than cut your long locks, look to have a balanced diet each and every day. Good luck.