One Square Meal was tested by the University of Otago's accredited GI research facility. The Apricot with Manuka Honey OSM and the Cranberry with Blackcurrant OSM have a low glycemic index with a rating less than 55, while the Chocolate with Manuka Honey OSM has a moderate glycemic index.

Prior to designing One Square Meal, we looked at a huge number of cereal bars on the market here and overseas and found that the one thing they all lacked was balance. For example those claiming to be low fat were often high in sugar. These bars tend to be bound together with white sugar and glucose syrup. The flow on from this is they generally have a high glycemic index causing a spike in your blood sugar followed by a crash that leaves you craving for more. It is hard to balance your energy intake with energy output when your blood sugar level is up and down like a yo yo.