JJ Virgin is a triple-board certified nutrition expert, Fitness Hall of Famer, and 4-time New York Times bestselling author who has spent decades helping women reclaim their energy, strength, and confidence.
After years of watching women struggle with restrictive diets, endless cardio, and advice that stopped working after 40, JJ set out to uncover what was really happening beneath the surface: declining muscle, a disrupted metabolism, and a system working against them, not because they were failing, but because the approach was.
In The Metabolism Fix, JJ combines the latest science on metabolism, muscle, recovery, nutrition, and aging with a practical, sustainable plan women can actually follow.
Her message is simple:
You don’t need to punish your body into changing.
You need to rebuild the systems that make it thrive.
Through her books, programs, podcast, and global community, JJ has helped millions of women feel strong, energized, and in control of their health again, without extremes, restriction, or starting over.