Another person may view «low carb» as 40 % of daily calories coming from carbs instead of the traditionally recommended 55 % to 60 %. (truthaboutabs.com)
The is, of course, obvious as your body prefers to use glucose as its main source of energy — which comes from the carbs you eat. (bodyketosis.com)
Essentially it means all the calories come from carbs on this day. (lowcarbalpha.com)