IBM Dietary Surveillance Study

Inclusion Criteria (Adults with IBM): * Diagnosis of Inclusion Body Myositis: As defined by the revised European Neuromuscular Centre 2013 diagnostic criteria (Definite or Probable IBM) * Age: Adults aged ≥40 years at the time of consent. * Ability to Provide Informed Consent: Participants must be cognitively capable of providing written, informed consent. * Disease Progression: Participants must be able to walk short distances, with or without the use of an assistive aid (e.g., a cane or frame) for balance, so that they can undertake study procedures without safety concerns. Must be able to consume solid or modified-texture food, with or without dysphagia adaptations (i.e., not exclusively tube-fed). * Willingness to Participate: Willing to attend study visits and comply with all study procedures. Inclusion Criteria (Control Participants): * Disease-Free: Control participants must be generally healthy, with no known myopathies or metabolic diseases. They must not have any conditions that, in the judgement of a clinician, would compromise their safety, impair their ability to complete study procedures, or influence study outcomes. * Age: Adults aged ≥40 years at the time of consent. * Ability to Provide Written Informed Consent * Willingness to Participate * Matched to IBM participants according to their age and physical activity levels Exclusion Criteria (Adults with IBM): * Coexisting Neuromuscular or Metabolic Disorders: Presence of other neuromuscular or metabolic di…