Managing IgA Nephropathy: A Guide to Lowering Sodium Intake

If you are living with IgA nephropathy (IgAN), a kidney disease, you may be more sensitive to sodium—the mineral in salt. Sodium can cause blood pressure to rise more quickly, potentially putting extra stress on already inflamed kidneys. You may as well experience proteinuria (extra protein leaking into the urine), medication issues, and other kidney problems with excessive sodium intake. However, there are effective ways to reduce sodium in your diet while still enjoying flavorful meals.

1. Cut Back on Salt Gradually

Abruptly eliminating salt can be challenging. Instead, slowly scale back to retrain your taste buds, as preferences naturally adapt over time.

• Avoid adding salt at the table. Keeping the salt shaker out of sight can reduce habitual salting.
• Reduce the amount of salt added during cooking incrementally.
• When following a recipe, start by using half the recommended salt and adjust to taste.

Over time, you’ll grow more satisfied with less salt and better able to detect high sodium levels in food.

2. Swap Salt for Herbs, Spices, and Citrus

Herbs, spices, and acidic ingredients can add flavor without increasing sodium intake, adding depth and brightness to your meals. Experiment with different combinations to find what you enjoy.

• Utilize fresh or dried herbs like basil, thyme, rosemary, cilantro, or parsley.
• Utilize pantry spices such as garlic powder, onion powder, smoked paprika, cumin, or black pepper.
• Add a splash of acid with lemon or lime juice, balsamic vinegar, or apple cider vinegar.
• Squeeze a lemon wedge over your food to brighten the flavor.

3. Cook More Meals at Home to Control Sodium

Cooking at home gives you greater control over salt content compared to eating out or relying on convenience foods. Restaurant meals, takeout, and packaged foods contribute approximately 70% of the sodium in a typical diet.

For example, a fast-food hamburger with condiments can contain around 640 milligrams (mg) of sodium. If you’re aiming for a daily sodium intake of 1,500 to 2,000 mg (depending on blood pressure, kidney function, and medications), that hamburger alone can account for a significant portion of your daily allowance.

Planning can make home cooking more manageable. Spend 20-30 minutes each week taking inventory and creating a grocery list. Meal-planning apps and AI-based resources can also help streamline the process.

4. Dine Out With a Plan

You don’t have to avoid restaurants altogether. Limit dining out to once or twice a week and employ these strategies:

• Review menus online beforehand and choose “heart-healthy” or lower-sodium options when available. Chain restaurants with more than 20 locations are required to provide nutritional information upon request.
• Request sauces and dressings on the side to control the amount used.

5. Choose Wisely at the Grocery Store

Opt for fresh vegetables and meats over packaged or processed options. When buying canned goods, look for labels that say “no salt added” or “low sodium.” If those aren’t available, rinsing canned beans or vegetables under cold water can reduce sodium content.

Be mindful of the “salty six” – foods commonly high in sodium:

• Breads and rolls
• Pizza
• Sandwiches
• Cold cuts and cured meats
• Soup
• Burritos and tacos

Swapping a standard slice of bread (around 350 mg of sodium) for a lower-sodium version (around 80 mg) can save roughly 270 mg of sodium on a sandwich.

6. Get in the Habit of Reading Nutrition Labels

Nutrition labels are essential for managing an IgAN diet. Look for foods where the milligrams of sodium are lower than the number of calories per serving. Aim for 140 mg of sodium or less per serving, which the Food and Drug Administration (FDA) considers “low sodium.” Be cautious of foods labeled “instant,” “ready-to-eat,” or “seasoned,” as they often contain added sodium.

Also, be aware that sodium can be listed under different names:

• Sodium chloride
• Sodium bicarbonate (baking soda)
• Sodium phosphate or disodium phosphate
• Monosodium glutamate (MSG)
• Brine or curing salts
• Baking powder

7. Be Careful With Salt Substitutes

Salt substitutes are not always safe for people with IgAN. Most replace sodium with potassium chloride, which can raise potassium levels in the blood. If your kidneys aren’t functioning properly, they may not eliminate excess potassium effectively, potentially causing heart rhythm problems.

Avoid salt substitutes unless your nephrologist or a dietitian has approved them based on your kidney function, medications, and potassium level monitoring.

The Takeaway

Reducing sodium is crucial for managing IgAN, as excess salt can raise blood pressure, increase proteinuria, and stress the kidneys. Gradually cutting back on salt, using herbs and spices, and cooking at home can make lowering sodium easier. Pay attention to nutrition labels, high-sodium foods, and hidden sources of sodium to stay within your daily goals. Consult with your nephrologist or a dietitian to create a safe and manageable kidney-friendly eating plan.