Some of the reasons why!

Xenoestrogens
Overuse of Anti-biotics
Subclinical Scurvy
Subclinical De-hydration
Benezene
extremely low Oxygen content
Chemtrails aka Aerosols
Heavy Metals
Sweetners
Excitotoxins
Sugars
McDonalds, Burger King Junk food
Processed food
Microwaves & Ovens + Cellphones & Towers
DOR
Lack of nutrition
Modern Farming methods
Government sponsored Viruses, Bacteria, Fungus & MYCOPLASMA
Toxic Allopathic drugs
IGNORANCE and PROFITS

What more?

-Anunnaki Tweet