When obesity in Brazilian adults went up from 7.5 per cent in 2002 to 17.5 per cent in 2013, Professor Carlos Monteiro from University of Sao Paulo, and his team researched their dietary patterns. They found that consumption of processed foods made people eat more, and led to increased obesity and Type-2 diabetes. This was happening in spite of the fact that people were buying less sugar and oil. The researchers also noticed an increase in the consumption of highly processed or ultra-processed, ready to eat, sugary and packaged food products. Following this, Professor Carlos Monteiro and his team developed the NOVA food classification which categories food into four groups, based on the processing, rather than in terms of nutrients.