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.
As with other diet plans, people who maintain a low-carbohydrate diet lose weight. In the case of low-carbohydrate diets, weight loss is helped by the increased feeling of fullness and a tendency towards selecting nutrient-rich food. A very low-carbohydrate diet performs slightly better than a low-fat diet for long-term weight loss.