The most important thing about the procedure, and the least explained.
This is the most important thing about the whole procedure, and the thing least often explained.
The hair at the back and sides of your head is resistant to DHT, which is why it survives after being moved. The number of follicles there is finite and does not regenerate.
So you have a budget. Every procedure draws from it.
If someone offers to cover everything in a single session with a very high graft count, that is not generosity — that is depletion. The result may look good in year one, and then, as loss continues in the surrounding areas, there is nothing left to fix it with.
The right approach is a surgeon who calculates your budget, spends it across a long horizon, and tells you honestly if your case needs to wait, or needs medical treatment before any surgery.
What does your case actually need?
The video explains the general rule. The number that applies to you is settled after an examination — the grafts your case actually needs, not a figure quoted before we have seen you.