What is the ruling on using the telomerase enzyme available in tablet form, which is said to regenerate nerve cells, restore youth, and achieve immortality?

The aforementioned enzyme, if scientifically proven, works to regenerate nerve cells and preserve youth, but it does not prevent death, for death is decreed for every soul. Allah Almighty said: ﴿Every soul will taste death﴾, and His saying: ﴿Indeed, you are to die, and indeed, they are to die﴾. So, no matter how much strength or youth a person attains, he has a predestined term from Allah, and no one can repel death when its time comes. Death is an observed reality that cannot be pushed away, and cell regeneration does not suffice against it.