Top 5 Kidney Stone Triggers

Kidney stones are a painful and often preventable condition influenced by various factors. Since triggers vary from person to person, identifying your unique risk factors is key to protecting your health and avoiding discomfort.

Common Kidney Stone Triggers and Tips

1- Dehydration:

The most common trigger for kidney stones is dehydration. Stones form when there are too many stone-forming substances like calcium, oxalate and uric acid compared to water. Here’s how to combat this:

• Aim to drink half your body weight in ounces of water. Typically, 3L is a good goal, or 2L if you are petite.
• Prioritize water intake by carrying a water bottle everywhere.
• Enhance the taste of water by adding lemon or fruit if you don’t enjoy it plain.

2- High Sodium Intake:

Eating too much sodium can lead to kidney stone formation as it increases calcium excretion in the urine. Here’s what you can do:

• Cook at home using fresh ingredients to reduce reliance on processed foods.
• Limit processed foods like canned goods, bread, processed meats, and pizza, which are high in sodium.

Pro Tip: Don’t make the common mistake of attempting to follow a no sodium diet when what you really need is a low sodium diet! Limiting processed foods should be your top priority when managing your sodium intake. The chart below lists the sodium content in commonly consumed processed foods. The next chart looks at the sodium content in minimally processed foods prepared with added salt. Notice the major differences in sodium between each group of foods. Processed foods contain dramatically more sodium when compared to unprocessed or minimally processed foods, even when those minimally processed foods have added salt.

Sodium Content of Common Processed Foods

Food Item	Portion	Sodium (mg)
Fast-food cheeseburger	1 medium, ~150g	1,200
Deli turkey sandwich	1 sandwich, 2 slices bread	1,340
Canned chicken noodle soup	1 cup, 240g	870
Frozen pizza	1 slice, ~140g	760
Hot dog with bun	1 link ~45g + 1 bun ~43g	750
Instant ramen noodles	1/2 package, ~43g, dry	780
Chicken burrito	1 medium, ~250g	1,250
Ham and cheese croissant	1 piece, ~100g	700

Sodium Content of Fresh Foods Prepared at Home with Added Salt

Food Item	Portion	Sodium (mg)
Lemon chicken	3 oz chicken breast, lemon juice, 1/4 tsp salt	220
White rice	1/2 cup cooked, 1/8 tsp salt	145
Asparagus	1/2 cup steamed, 1/8 tsp salt	145
Broccoli	1/2 cup steamed, 1/4 tsp salt	175
Salad with grilled chicken, feta, and olive oil + vinegar	1 cup greens, 3 oz chicken, 1 oz feta, 1/8 tsp salt in dressing	350
Peanut butter and jelly sandwich	2 slices whole wheat bread, 2 tbsp natural peanut butter with added salt, 1 tbsp jelly, no added salt	355
Homemade chicken noodle soup	1 cup, ~240g, low-sodium broth, 1/8 tsp salt	270

As you can see from the tables, even with a bit of added salt, you can still maintain a low-sodium diet. This is crucial because a little salt can significantly enhance flavor and satisfaction, making this dietary lifestyle more realistic and sustainable in the long term. Remember, balance is key to enjoying your meals while staying healthy.

3- Dairy/Oxalate Imbalance

Dairy is helpful for preventing stone formation as the calcium in dairy binds to oxalate in the gut, preventing it from forming a stone in the urine. Here’s how you can manage your intake:

• Include at least two servings of dairy daily
• Limit high sodium forms of dairy such as cottage cheese
• Limit high sugar forms of dairy such as ice cream
• Avoid the following high oxalate foods, especially spinach, beet greens and Swiss chard due to their significantly high oxalate content..

High-Oxalate Foods

Food Item	Portion	Oxalate (mg)
Swiss chard, cooked	1/2 cup	960
Spinach, cooked	1/2 cup	755
Beet greens, cooked	1/2 cup	610
Cashews	1 oz	150
Buckwheat, cooked	1/2 cup	133
Hazelnuts	1 oz	130
Almonds	1 oz	122

Low-Sodium Dairy Sources

Dairy Food	Portion	Calcium (mg)	Sodium (mg)
Plain kefir	1 cup	350	100
2% milk	1 cup	300	100
Parmesan cheese, low-sodium	1 oz	310	140
Swiss cheese	1 oz	270	75
Emmental cheese	1 oz	280	60
Gruyère cheese	1 oz	270	100
Low-fat regular plain yogurt	3/4 cup	250	85
Low-fat Greek yogurt	3/4 cup	220	60
Ricotta cheese, part-skim	1/4 cup

4- Excess Animal Protein

Consuming too much animal protein, such as meat, poultry, and seafood, can lead to kidney stone formation. This is because it increases calcium excretion and makes the urine more acidic. Here’s how to manage your protein intake:

• Limit flesh animal protein to 1-2 times per day.
• Be mindful of portion sizes; a good rule is to stick to a portion the size of your palm.
• Consider incorporating more plant-based proteins into your diet.

5- Insufficient Vegetables and Fruits

Vegetables and fruits help alkalize urine and increase urinary citrate, both of which are beneficial in preventing kidney stones. Many people fall short in this area, so consider these tips:

• Make fruits and vegetables a staple at every meal and snack.
• Aim for a combination of cooked and raw produce for variety and maximum nutrient intake.
• Experiment with different fruits and vegetables to find those you enjoy most.

Check Also: Kidney Friendly Snacking

Bonus Pro Tip:

For recurring stones, ask your doctor for a 24-hour urine test to identify your unique triggers. OR

Frequently Asked Questions