Will Drinking Protein Shakes Stop Hair Loss How To Stop My Hair From Falling Out? (vegetarian)?

How to stop my hair from falling out? (vegetarian)? - will drinking protein shakes stop hair loss

I have lots of hair when I wash my hair in the shower.
I had my hair dyed black) (roots, but not often.
I am a vegetarian.
but I take a protein smoothie in the morning, like protein bars, which as a substitute for meat, I eat vegetables / fruits.
Take B12 C, prenatal vitamin A and vitamin and DHA.
What other vitamins should I have chosen.
I eat a balanced diet, I do not know why I lose so much hair.
Need help?