Which vitamin help to growth head hair

What is the treatment of hair falling  :
1. consult a dermatology doctor to do the needed medical examnation and determine the treatment pathway
2. have a healthy diet and avoid stress 
3. if there is infection or disease in sculp or hair area , treat it first before starting hair loss treatment 
4. doctor may prescribe medication such as :
- minoxidil 
- Finasteride
5. if medications didnt work out effectivily , you can do hair implantation 
How long does the medication ( minoxidil and Finasteride ) take time before showing any effects :
usually minoxidil and Finasteride take around 6-12 months before showing results , but sometimes results show up as early as 3 months 
Vitamins that are helpful to hair loss :
1. vitamin C 
2. vitamin E 
4. vitamin A 
4. zinc 
5. selenium 
6. biotin 
7. vitamin b 12 
Causes of hair falling :
1. genetics 
2. stress
3. dont pay attention to hair hygine and hair care 
4. hypothyroidism
5. unhealthy diet and some medications side effect
6. low quality hair products 
Needed medical test :
1. physical examination 
2. blood test