In July 2018 researchers from France published the results of their study to assess the effect of a 2-year diet that excluded six refined foodstuffs, ie margarine, vegetable oils, butter, cream, processed meat, and sugary drinks, which have been implicated in obesity. The diet was called the “1,2,3 diet”. A total of 105 individuals (average age 50 years; average BMI 30.5 kg/m2) were involved in the study, of whom 39% had diabetes type 2. Weight and fasting blood glucose levels were assessed both at the start and end of the two year period. It should be noted that professional contact was kept to a minimum to mimic the approach used by most dieters. Results showed that over the two-year period, the average weight loss was 4.8 kg, which represented 5.6% of their initial body weight. However, only 51% of individuals were able to complete the two year duration, but amongst these individuals the average weight loss was 5.5 kg, with 56% having a reduction of at least 5% of their initial body weight. Diabetics were seen to have a similar weight loss to non-diabetics, and the average HbA1c level was seen to decrease by 1% without there being any modification in glucose-lowering medications. It was also noted that those who completed the two year period had made changes to their diet which was typically in the form of a higher intake of bread, dairy products, chocolate, and fresh fruit. The researchers concluded that the “1,2,3 diet” produced significant long-term weight loss despite minimal professional contact. However, further research is required to confirm these findings in view of the fact there was no control group and a high number failed to complete the study.
Courie R et al. Weight outcome after 2 years of a diet that excludes six processed foods: exploratory study of the “1,2,3 diet” in a moderately obese population. Diabetes Metab Syndr Obes. 2018 Jul 12;11:345-355