There is no doubt that the mind changes as it ages. You'll be a different person in your 20s, 30s, and so on.
For some, brain deterioration is genetic. While you can't medicate mental problems away, you can upgrade your internal software by widening your perception and controlling your emotions to so-called triggers.
The human brain is plastic
Strengthening the operating system protects against the destructive forces of sensory stimulants that try to undermine chemical synchronicity. Knowing that you can gauge your reactions to uncertainty while strengthening the bonds between neurons and synaptic connections helps alleviate anxiety's thinking problem.
Babies are born platform agnostic; it's mostly the environment that shapes their internal compass as they grow into adults. Health, philosophy, and social behaviors produce an entire ecosystem of choices where balancing the right springs and gears to maintain the human clock is the key, per say.