The National Academies of Science (NAS) recommends keeping sodium intake to below 2,300 mg a day . However, this applies only to the general population. Athletes, construction workers, soldiers and anyone who sweats profusely can and should take more sodium. The same goes true for beginning keto dieters who lose a lot of sodium through frequent urination .
Depending on how much fluid you're losing as well as your activity levels, you may need to take anywhere between 3,000-5,000 mg sodium. You can get this amount from simple table salt, bouillon cubers, and sugar-free sports drinks.
Talk to your doctor or other healthcare professional before adding sodium to your diet if you have kidney disease, high blood pressure, or heart problems.