Primary, secondary, and tertiary sources may all be appropriately used, if (1) they are used without engaging in original research or synthesis and (2) if in the event of conflicts between sources they are treated with the appropriate deference to the better source.
There is some evidence that a low-carbohydrate diet may help people lose weight more quickly than a low-fat diet (31,32)âand may help them maintain that weight loss.
Based on decades of research, low-carb diets have been linked to benefits including: 1  fast weight loss. 2  reduced hunger. 3  better control over insulin and blood sugar.  enhanced cognitive 1  performance. lower risk for heart disease factors.  reduced risk for certain types of cancer.