How To Prevent Hair Falling Problem?

Hi, I'm 18 years old, male. I dont know if I have to worry about my problem because when i was checking my 10 year old pictures i saw that my forehead widens for like 1 inch.. and i remember i was using gel when i was 10 years old and never missed a day up to now. Is this serious or normal? Is there a known food that i can eat to restore or should i just buy a hair restore pills or something?