You do not need expensive groceries, specialty foods, or fancy supplements to follow the Kidney Stone Diet®. Some of the most affordable foods at your grocery store can help you meet your kidney stone prevention goals, and I want to show you how to make the most of your food budget.
I’ve been helping patients prevent kidney stones since 1998, and I know how overwhelming it can feel when you’re trying to change the way you eat, especially when groceries are so expensive. Many people assume eating for kidney stone prevention means buying special foods or shopping at expensive grocery stores, but that simply isn’t true. You can follow the six goals of the Kidney Stone Diet® with ordinary foods that are available at most grocery stores. The key is knowing which foods to buy, how to use them in different meals, and where you can save money without sacrificing your nutrition.
The Cheapest Foods for Each of the Six Goals
Let’s start with water, because this is probably the easiest place to save money. If your tap water is safe to drink, there’s absolutely no reason to spend your hard-earned money on expensive bottled water. You don’t need fancy alkaline water or specialty electrolyte drinks to stay hydrated. In fact, some of those expensive drinks may actually be increasing your kidney stone risk because they’re loaded with sodium and added sugar, two things we’re specifically trying to reduce. Most kidney stone formers don’t need electrolyte drinks for everyday hydration, although there are exceptions, such as heavy sweating, vomiting, diarrhea, or certain medical conditions. I cover this in my article, Electrolyte Drinks: Do You Need Them? For most of us, plain water is all we need, and keeping a reusable water bottle nearby makes it easier to drink throughout the day without spending extra money.
When it comes to sodium, some of the least expensive foods in the grocery store can also be some of your best choices. Plain rice, oats, frozen vegetables without sauces, and fresh produce are great staples to keep on hand. Cooking at home gives you much more control over how much sodium you eat, and if you’re not sure what to do with all those vegetables, I’ve got plenty of ideas in my article, Eat Your Darn Veggies!
You can also add plenty of flavor to your meals without relying on salt. I’ve put together a collection of salt-free seasoning recipes that you can make yourself using spices you probably already have in your kitchen. If you struggle to lower sodium, check out my 100 tips for lowering sodium. You can make so many simple changes without spending more money. Remember, we’re working toward about 1,500 mg of sodium per day, and you don’t need expensive specialty products to do it.
People sometimes make the calcium goal more complicated than it needs to be. Regular milk and plain yogurt can be affordable calcium sources, especially when you buy larger containers instead of individual servings. But I also recognize that not everyone likes, tolerates, or chooses to eat dairy, and that’s perfectly fine! Calcium-fortified oat, flax, and pea milks can be good alternatives, and foods like kale and calcium-fortified non-dairy yogurt can also contribute to your daily calcium intake. You can find more options in my article on 16 non-dairy calcium sources for kidney stone formers. Whatever you choose, read the labels, compare prices, and remember to spread 1,000 to 1,200 mg of calcium throughout the day, depending on your needs. I also encourage you to include calcium-containing foods with your meals, especially when you’re eating oxalate-rich foods. This will help lower oxalate in your urine.
Reducing added sugar is one goal that can actually save you money. Instead of buying expensive flavored oatmeal packets, get a large container of plain oats and add your own fruit. The same goes for yogurt. A larger container of plain yogurt may cost less per serving than those little individual cups, and you get to decide what goes in it. You don’t have to buy specialty sugar-free products or expensive snacks just because you’re trying to eat less added sugar. Ordinary foods work just fine. If you want more ways to cut back, I put together an article with tips and tricks for lowering sugar. You’ll find plenty of practical ideas to reduce added sugar without feeling like you’re giving up everything you enjoy.
Protein is another area where people often spend more than they need to. You don’t need enormous portions of chicken, steak, or fish at every meal. Eggs, beans, and reasonably priced cuts of chicken can help you get the protein you need without spending a fortune. But how much protein do you actually need? For many adults, a starting point is about 0.36 grams of total protein per pound of body weight per day (the lower end of the range), but your needs depend on age, activity level, and medical conditions. Remember that total protein includes everything you eat, not just meat. I explain your total protein needs in my article, where you’ll also find my meat protein calculator to help you figure out the right amount for you. Remember, we’re not trying to eat as much protein as possible. We’re trying to get enough protein to meet our needs while keeping our kidney stone prevention goals in mind.
And for my vegetarian and vegan kidney stone formers, I haven’t forgotten about you! Foods like tofu, lentils, and beans can also be affordable protein sources. Please don’t be afraid of beans just because they contain oxalate. However, not all beans are alike, and portion sizes matter. Here is an article on bean oxalate levels to help you make informed choices. I also have a guide to protein sources for non-meat eaters with additional ideas.
Finally, let’s talk about oxalate, because I know this goal can be confusing. You don’t need to buy special low-oxalate foods, and you certainly don’t need to fear every fruit, vegetable, or grain in the grocery store. Foods like cabbage, cauliflower, green peas, apples, oats, and red kidney beans can all fit into your plan. I generally use 100 mg of oxalate per day as a practical guide for calcium oxalate stone formers, although individual recommendations can vary.
This leaves room for a wonderful variety of foods, and I want you to focus on what you can eat rather than worrying about every milligram. If oxalate is something you’re struggling to understand, I’ve got you covered! My oxalate education page is filled with information about oxalate, food choices, and the important role calcium plays. You’ll also find my searchable oxalate food list, plus a high-fiber, low-oxalate grocery list for even more ideas. Please don’t let oxalate worry keep you from eating affordable, nutritious foods you enjoy.
A Week’s Grocery List on a Budget
If I were shopping for one person on a tight grocery budget, I would start with a few affordable proteins, some calcium-rich foods, a couple of grains, and fruits and vegetables I could use in several meals. I wouldn’t try to make seven completely different dinners or buy a bunch of ingredients I might use only once. That’s an easy way to spend more money than you need to, especially when some of those ingredients go bad before you get around to using them.
For protein, I might buy eggs, sale-priced chicken, and dry or no-salt-added canned beans. If I didn’t eat meat, I could substitute tofu or lentils. For calcium, I’d compare the price of regular milk with larger containers of plain yogurt, or choose a calcium-fortified plant milk if I didn’t eat dairy. Then I would add old-fashioned oats, rice, and pasta, along with affordable vegetables like cabbage, carrots, onions, and frozen broccoli or green peas. Apples, bananas, and frozen strawberries would give me fruit options without buying a huge variety of produce. This would give me a good starting point for a week of simple meals, and I could adjust the quantities based on how much food I actually needed.
With those ingredients, I could make oatmeal with fruit and milk for breakfast, eggs with vegetables for lunch, and chicken with rice and broccoli for dinner. I could use leftover chicken in pasta the next day, make a simple bean-and-vegetable dish, or put together a meal with eggs, rice, and whatever vegetables I still had in the refrigerator. If I were eating plant-based meals, I could use tofu or beans instead of chicken and choose calcium-fortified non-dairy milk. None of these meals needs to be complicated, and you can always adjust the portions and ingredients to meet your personal nutrition goals.
Also, check what you already have before heading to the store. If there’s a bag of rice in your pantry and frozen vegetables in your freezer, you already have part of a meal. Build around those foods instead of starting from scratch every time you shop. If you need ideas for what to cook, take a look at my Kidney Stone Diet recipes. Use them for inspiration, and substitute ingredients based on what you have available and what fits your budget. Your kitchen, your rules!
Frozen Produce and Store Brands
One of my favorite ways to save money is buying frozen fruits and vegetables, especially when fresh produce is expensive, or I know I won’t use it quickly enough. Frozen produce can be just as nutritious as fresh, and I love that you can take out exactly what you need and put the rest back in the freezer. There’s no reason to feel like you have to buy everything fresh to eat well. Frozen broccoli, cauliflower, green peas, and strawberries are all convenient options that can be used in different meals throughout the week.
Just make sure you’re checking the ingredients, because plain frozen vegetables aren’t the same as those covered in salty sauces or seasonings. Know what you’re buying, especially when you’re working to lower sodium. The same goes for canned vegetables and beans. When possible, choose no-salt-added versions and compare labels to find what fits your budget and kidney stone prevention goals.
And please don’t overlook store brands! You don’t need the fancy name on the package to get good nutrition. Compare unit prices and nutrition labels on oats, rice, yogurt, milk, and frozen produce. Sometimes the store brand gives you exactly what you need for less. I would much rather see you spend less money on perfectly good everyday foods than feel pressured to buy expensive products because the packaging makes them look healthier.
What to Skip
This is where you can really save money. First, skip specialty products marketed specifically to people with kidney stones. You do not need expensive waters, kidney cleanses, detox products, or miracle supplements to follow the Kidney Stone Diet®. I know those products can sound tempting, especially when you’re worried about forming another stone, but don’t assume something is better just because it costs more or makes a big promise on the label. And please remember, you need to understand your individual stone risk factors before you know what to treat. That’s why a 24-hour urine collection matters. It shows us what’s going on in your urine and what needs to be addressed.
Learn how and why to do a 24-hour urine collection. Spending money on products that promise to prevent stones without knowing your risk factors may be a complete waste. You need to know what you’re treating before you can make the right changes.
I would also be careful about paying extra for foods just because they’re labeled organic, gluten-free, high-protein, or sugar-free. There may be good reasons to choose some of those products, depending on your needs, but none of those labels automatically mean a food is better for kidney stone prevention. If you enjoy a specialty product and it fits your budget, that’s your choice. I don’t want you thinking that you have to buy it to meet your six goals.
Another thing I would skip is buying too much food without a plan. I know how easy it is to get excited at the grocery store (been there, done that), especially when you see something on sale, but a bargain isn’t much of a bargain if the food ends up in the garbage. Think about what you actually eat, what you can realistically cook, and how you can use ingredients more than once. A head of cabbage can be used in several meals, and a bag of frozen vegetables can last beyond one dinner. Simple planning can make your grocery money go further.
Above all, remember that kidney stone prevention doesn’t have to be expensive or complicated. You don’t need a refrigerator filled with specialty foods, and you certainly don’t need to spend money you don’t have trying to eat perfectly. What matters is consistently working toward your six goals with foods that you enjoy, can afford, and will actually eat.
Here’s what I’d love for you to do before your next grocery trip. Check your pantry, refrigerator, and freezer, and see how many foods you already have that fit your Kidney Stone Diet® goals. Then plan a few simple meals using those ingredients before making your shopping list. You might be surprised at how much you can accomplish without buying anything fancy.
And if you want to take the guesswork out of meal planning, I’ve already done the work for you! My Kidney Stone Diet® Weekly Meal Plans include simple, satisfying recipes with all the nutritional information, including oxalate, already figured out for you. Every week, you’ll get new meal ideas that fit your kidney stone prevention goals, so you can spend less time worrying about what to eat and more time enjoying your food.
What about you? Do you have any tips or tricks for saving money on your grocery bill? I’d love to hear them! Share your ideas in the comments below so we can all learn from each other.
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