NOTE: The 1:1 Diet is NOT suitable for any of the the following conditions: Alcohol/ substance misuser within 1 year of recovery. Current eating disorders. Heart failure/ attack/arrhythmia or valve disease requiring treatment in the last 3 months. MAOI medication taker. Serious mental health disorders such as schizophrenia, delusional disorder, psychotic episode, bipolar disorder within the last 6 months. Serious illness trauma or surgery within the last 3 months. Stroke / TIA within the last 3 months. Anti obesity medication. Ladies who are pregnant, breastfeeding, or who have given birth in the last 3 months, and those younger than 14 years.