Could my diet be causing my hair loss?

I researched a lot but got a diverse array of answers. If the delivery system is inhibited, does that mean a healthy Lifestyle (Stop Smoking, Lots of Water and veggies, exercise) might have positive influence on your hairloss prevention?

99% of men who lose hair are losing is for genetic reasons. To lose hair from diet, for example, you would have to have undergone very rapid weight loss or be dietary insufficient with multiple vitamin deficiencies.