Please do whatever you can to get the recommended salt intake... according to Dr. Tran Tien, "During the protein-saving diet, a drop in blood pressure is the main cause of fatigue. This is referred to as orthostatic hypotension, which is the result of a significant loss of water and salt. Increased water and salt intake should eliminate fatigue."
You certainly don't have to take it all at once... a pinch here & a pinch there & by the end of the day, you'll hardly know you had any salt, but it'll all be gone...
hugs