However, health is not the main reason for Jewish dietary laws and in fact many of the laws of kashrut have no known connection with health.
To the best of our modern scientific knowledge, there is no reason why camel or rabbit meat (both treif) is any less healthy than cow or goat meat.
The method of slaughter is a quick, deep stroke across the throat with a perfectly sharp blade with no nicks or unevenness.
This method is painless, causes unconsciousness within two seconds, and is widely recognized as the most humane method of slaughter possible. This is the only dietary law that has a reason specified in Torah: we do not eat blood because the life of the animal is contained in the blood.
The word "Kashrut" comes from the Hebrew meaning fit, proper or correct.
The word ", is also often used to describe ritual objects that are made in accordance with Jewish law and are fit for ritual use.
As discussed above, shechitah allows for rapid draining of most of the blood.
The short answer to why Jews observe these laws is because the Torah says so.