The hate I hate believing.

the first one is an active growth fueled by hormonal signals like growth hormone and puberty hormones, and this one develops your body and mind into your highest peak as a mature adult roughly until age 25

after that these growth hormones simply stop, and your body then just ages because its being worn down through physical wear and tear and you are literally just physically using yourself out faster than you can replace yourself

since we know god tiers continue to age from 13 to 16 since we can see and perceive the physical and mental differences in maturity between living god tier characters of different ages, but we know they cannot die unless it is just or heroic

then it makes sense to me that god tiering does not get involved with any biological processes of maturity, but does prevent natural wear and tear of the body so as to prevent death

conclusion? all living god tier people will age into maturity, reach their peak at roughly age 25, and then stay there permanently and never age higher than that, always constantly at their peak physical and mental condition due to the immortality condition of god tiering constantly refreshing their body and preventing wear and tear