from outside u can only condition the hair to look it better for a while and it might effect a little.. but the real treatment cant be done with shampoos or oils..

1. Buy Sevenseas pure cod liver oil capsules for daily use
2. Use other vitamins containing Biotin.. that is especially made for hair.. i guess permea plus ppl have these tablets
3. keep ur hair short and have a regular haircut
4. Use black strap molasses for iron/zinc deficiencies in case u have
5. use a mild shampoo daily.. not the one that r advertised everyday.. its the sign of weaker products.. i would recommend Flora or u can find lot of mild shampoos in Japanese products.. or even garnier is ok for daily use.
6. the most important thing is to have a balanced and pure diet..fruits/veges and meat.. in meat prefer liver meat.. its better for hair growth.. eat egg yolk.. its very good for hair/skin.. eat all types of fruits regularly.. choose only green salad as a meal once or twice a week.. prefer it with olives
avoid any food that is too much processed..
7. as everyone said exercise daily.. keeping all the above ingredients in ur body will help but to make sure it flows well all over ur body is exercising/yoga etc.
8. work hard but only during the office timings.. give a f.. to ur boss and job once ure out of the office.. it will release stress n u will be back to normal life
9. At the end use chicken korma, curry, rice/sambar or extra virgin olive oil :) wateva for a healthy and shiny look.. avoid gel/wax.. even if u use it wash it as soon as u reach home.. keeping ur scalp dirty can effect ur hair