Hayden Panettiere has publicly shared the profound impact of her brother Jansen's death on her health, revealing that she experienced significant weight gain and a resurgence of agoraphobia following his passing in February 2023. Jansen, who died at 28 from an undiagnosed heart condition, was described by Hayden as her only sibling and a source of emotional support. In her grief, she reported gaining 40 pounds in just days due to stress and cortisol, leading her to feel unrecognizable and fearful of leaving her home. With the help of personal trainer Marnie Alton, Panettiere began taking therapeutic walks that allowed her to process her grief and regain confidence. While she has made strides in her mental and physical health, she acknowledges that the loss of her brother will always haunt her, stating, 'I felt like I lost half of my soul.' Panettiere's journey underscores the intertwining of mental health and physical well-being in the wake of trauma.