Quit drinking and smoking, quit eating dairy products, quit consuming caffeine.
Hair loss is caused by bad diet, foods that inflame the skin (caffeine, alcohol), and hormones that accelerate the death of hair follicles (BgH hormones in milk).
At your age it may be too late to stop the progression but you can slow it down with a healthy diet and clean living.
I'm 50 and have a full head of hair with no bald spot. I have never drank, smoke, I avoid all dairy products except for the occasional bit of cheese on pizza, and I stopped drinking caffeine because it was wrecking my skin.
Also if you are fat, you can make yourself diabetic and diabetes accelerates hair loss.
