That actually seems like an improvement. A couple of years ago, an article like this one probably would have said that you needed 120 grams of dietary carbohydrate a day, rather than 50. That was based on how much glucose the brain generally goes through in a day when a person's on a high carbohydrate diet. At least this recommendation is based on the threshold where most people will go into ketosis--they leave some room for a more moderate, just short of ketogenic, carbohydrate diet. The idea that ketosis guarantees loss of lean mass is utter nonsense.