The Science of Youth: When Do We Peak and When Does Decline Begin?

• Physically, humans are youngest between 20 and 30 years old, with peak muscle strength, stamina, lung capacity, and bone density.
• During this period (20-30), the body recovers fastest from injury or illness, as indicated by studies from Harvard and Stanford Universities.
• Brain processing speed peaks between 20 and 30, but decision-making, emotional control, and practical intelligence mature between 30 and 40.
• Physical changes like muscle mass decrease (1% annually), slowed metabolism, and hormonal shifts begin gradually after 30.
• A healthy lifestyle, including diet, exercise, sleep, and stress reduction, can significantly extend the feeling of youth into the 50s and 60s.