Brief Answer:
Keratin works from outside

Detailed Answer:
Hello and welcome,

How many hair do you lose in a day? Are you seeing any bald patches and where? Do you see new hair growing?
Keratin works from outside and strengthens the hair shaft to make it smooth and straight. So you may try it. Although we need to figure out the cause of hairfall before trying chemicals on it. Do you have any dandruff, anemia, stressor like infection, anxiety etc,use of any medicines or any other obvious cause?
Do you take a healthy nutritious diet and clean drinking water?
Do you take 4-5 fruits in a day?

In eatables, healthy, home cooked foods, fruits and clean drinking water are needed. An exercise or yoga regime will also help.
If excess hairloss is there, you may try Tab XXXXXXX XXXXXXX Tattva Sukesha XXXXXXX once a day for a week and see if new hair growth happens with it.

Hope this helps. Let me know if I can assist you further.
Dr Vaishalee

---