this one is really effective.
To avoid dandruff u have to apply these simple tips :
1. apply curd with a teaspoon of lemon juice then wash ur hair after 1 hr with a mild shampoo (avoid using dandruff control shampoo bcuz they contains harmful chemicals)
2. apply warm coconut oil with a teaspoon of lemon juice then wash after half an hour.
and also control ur hair fall and increase the length of hair.
These two are most effective tips as i have very long hair and these tips helps me a lot .