There are endless reasons as to why long hair is good for you.
You must understand our Guru's made us keep our hair for a reason, and the problem with todays youth is that they have trouble understanding and accepting those reasons.
Hair are some of the scientifc reasons why i beleive long hair is good for us:
1) Greek and Italian Scientists such as Leanardo Di Vinci as wells many others beleived that long hair was able to pick of cosmic energy that is all around us. Although no one has really been able to prove this, neither has anyone been able to disprove this.
2) Keeping long hair gives a good indication as to how healthy you are. If your diet is poor you hair will show signs of this e.g it may begin to fall out, or change colour etc... Other diseases and traumas can cause temporary or permanent loss of hair, either generally or in patches.
3) You have eyes so you can see, you have ears so you can hear, nose so you can smell/ breathe, etc.....
God gave everything on our bodies for a reason. People will beleive everything the read or hear on Tv and in newspapers but when our Guru's tell us to keep long hair we cant stop questioning this decision.
4)long Hair tied in a jora is able to protect your head. (This isnt scientific but Common sense).
5)Long Hair is able to block harmful UV rays from reaching our skin. Why else do you think skin cancer rates in punjab were so low compared to other parts of the world where people cut there hair.
6) Darwins thoery of natural selection states that all beings evolve in order to better adapt themselves to their environments. Therefore we have evolved into having long hair for a reason. One of the problems is that we have not been able to fully understand the benifits of long hair. But bear this in mind our Guru's told us not to consume alcohol/tabacoo/drugs hundreds of years before any scientists proved their negative effects on our body. They told us, so we could be protected from them. Our Guru's told us to keep long hair and maybe one day some scientists will be able to fully explain its benifit
STOP QUESTIONING THE GURU'S TEACHINGS AND ACCEPT GOD'S WILL!!!