Potassium Supplementation on Low-Carb Diets

Monitoring and Treatment

The European Heart Journal recommends monitoring serum potassium levels in patients taking medications that affect potassium, such as ACE inhibitors, ARBs, potassium-sparing diuretics, and spironolactone, particularly in high-risk patients 1
The European Heart Journal suggests that patients with chronic kidney disease require close monitoring of serum potassium levels 1
Diabetes Care recommends monitoring serum potassium levels in patients with diabetes requiring insulin or other glucose-lowering medications 2
The European Heart Journal recommends treating patients with serum potassium levels below 3.0 mmol/L, and maintaining levels above 3.5 mmol/L in certain high-risk individuals, such as those on digoxin 1

The European Heart Journal recommends increasing dietary potassium intake to 0.5-1.0 g/day above baseline through low-carb, potassium-rich foods, such as avocado, spinach, and fish 1
The Journal of the American College of Cardiology suggests that fish and lean meats are good sources of potassium, and that nuts and seeds are compatible with low-carb eating 3
Diabetes Care recommends consuming low-carb vegetables, such as broccoli, summer squash, and salad greens, as a source of potassium 4
The World Health Organization recommends a daily intake of at least 3,510 mg (90 mmol) of potassium from food sources, while the 2015 Dietary Guidelines suggest 4,700 mg/day for optimal cardiovascular health 3

The European Heart Journal recommends using 75% sodium chloride/25% potassium chloride blends to achieve favorable sodium-to-potassium ratios of 1.5-2.0 1
The Journal of the American College of Cardiology suggests that oral potassium chloride is a preferred supplementation method, providing 40-60 mmol (1,380 mg) daily 3

The European Heart Journal recommends avoiding excessive potassium supplementation in patients with advanced chronic kidney disease, restricting dietary potassium to <2.4 g/day 1
The European Heart Journal suggests that patients on potassium-sparing medications require close monitoring of serum levels 1
Diabetes Care recommends that very low-carb ketogenic diets (<50g carbs/day) be considered short-term (3-4 months maximum) due to limited long-term safety data, and that they are not recommended for pregnant/lactating women, children, those with renal disease, or individuals at risk for disordered eating 2

The Journal of the American College of Cardiology suggests that potassium supplementation reduces systolic blood pressure by 2 mmHg in normotensive and 4-5 mmHg in hypertensive patients, with a doubled effect in those consuming high-sodium diets 3