There is no specific cut-off date for when you can bank your cells. While no two people are the same, the average person reaches a peak cellular health in their 20s and then begins an arithmetic decline until sometime in the mid 60s, at which point the pace of aging begins to accelerate considerably, and you start to see an increase in age related conditions.
You’re never as young as you will be today, so for most patients, we recommend to bank as early as possible so that you can leverage regenerative treatments when they become available.