Because they captured energy from the sun through a process called photosynthesis
By strengthening your body it allows it to take more hits or strain without becoming injured.
Types of drugs that relieve depression...
(SSRIs), such as citalopram (Celexa), escitalopram oxalate (Lexapro), fluoxetine (Prozac), fluvoxamine (Luvox), paroxetine HRI (Paxil), and sertraline (Zoloft)
Hope this helped