A doctor shares her muscle-building routine for longevity, from quick weightlifting workouts to daily protein

Longevity doctor Jennifer Timmons said she follows the same advice she gives to patients about lifting weights and eating plenty of protein to build lean muscle. Felicia Lasala Muscle mass is an investment in your future health, according to a longevity doctor. She keeps her fitness portfolio strong by lifting weights and eating enough protein throughout the day. For an extra edge, she uses supplements like creatine to support muscle building and brain health. For Dr. Jennifer Timmons, building muscle isn't just aesthetic; it's a prescription for a long, healthy life for both herself and her clients. Timmons, a board-certified longevity doctor in California, said muscle is essential for a healthy metabolism, protecting the bones and joints, and staving off illness and frailty as we age. "The key to maintaining our independence is maintaining our muscle mass," she told Business Insider. "Strong is the new goal.