I am just curious to know how many grafts would it take for a Norwood 6 to return back to a Norwood 1? I know this is not possible, but suppose hair multiplication became possible in the next decade, can you give us an estimate of how many grafts it would take for a Norwood 6 to return back to Norwood 1 ?
In general, you need about 15% of your original hair density to achieve the appearance of non-balding if you have an average hair density. Please note that this will give you a non-balding look (somewhere between a Class 2 and 3 pattern), but not the complete original density. Moreover it is NOT all about the numbers. Factors such as hair color, skin color, texture, etc are of great importance. For more, check out the Assessing Hair Loss page at the NHI site (scroll down to “How Much Hair Do I Need?”).
But if you want to know how many grafts you need to replace (hair for hair) of hairs lost, it could be in the 30 to 50 thousand hairs range. This is based on a general assumption that you are born with about 100,000 hairs. Remember, grafts are made up of 1-4 hairs.