Anyone with no salt, low carb diet?

That's exactly the diet my mom is on for congestive heart failure. She has to do fewer than 600 mg of sodium person day, and she's been doing a diabetic diet to lose weight and put less pressure on her knees. She's been pretty successful with both, although she's had to make a lot of things from scratch to avoid huge amounts of sodium. She's stumbled across some pretty good recipes and low-so products.