GABA and GSH in FRDA

Inclusion Criteria: * Age ≥ 8 years; \<16 years * Written informed consent provided * Balletic Guanine-adenine-adenine (GAA) trinucleotide repeat length \> 55 in intron 1 of Frataxin (FXN) and/or GAA repeat length \> 55 in intron 1 of FXN in one allele and another type of mutation that is inferred to cause loss of function in the second FXN allele as documented in the medical record * Friedreich's Ataxia Rating Scale (FARS) Functional staging score of ≤ 5\^ and total modified Friedreich's Ataxia Rating Scale (mFARS) score of ≤ 65 on enrolment Exclusion Criteria: * Age \< 8 years \> 16 years * Acute or ongoing medical or other conditions that is deemed to interfere with the conduct and assessments of the study * Other psychiatric or neurologic conditions apart from FRDA that, in the opinion of the Site Investigator, would interfere with the conduct and assessments of the study * MR contraindications (e.g., pacemaker or other metallic surgical implants) * Presence of metallic dental braces * Currently pregnant participants * Confined to wheelchair or bed with total dependency for all activities of daily living. Total disability. * Unable to understand English instruction