What Foods Have Low Potassium? Kidney-Friendly Guide

Low-potassium foods typically contain less than 200 mg of potassium per serving, including fruits like apples and berries.

If you’ve been told to lower your potassium, you might assume your diet is about to get very restrictive. Bananas, potatoes, and tomatoes are out — but the list of foods you can still enjoy is surprisingly long.

A low-potassium diet doesn’t mean bland eating. It means choosing fruits, vegetables, grains, and proteins that naturally keep potassium under 200 mg per serving. This guide covers the foods that fit the bill, plus practical tips for making the transition easier.

What Counts as a Low-Potassium Food

A low-potassium food is generally defined as one containing less than 200 milligrams of potassium per serving. That threshold comes from major kidney organizations and health agencies, including the National Kidney Foundation and the NIH.

Most fruits and vegetables fall into two camps: those under 200 mg per serving (safe) and those over (limit). Grains, proteins, and dairy alternatives also have clear low-potassium options.

The key is knowing which specific items fit the 200 mg rule — and how much of them counts as a single serving. Serving sizes matter because even a low-potassium food can add up if you eat a large portion.

Why the Potassium Rule Feels Tricky

Potassium is everywhere in whole foods, so it’s easy to assume you have to cut out entire food groups. But the truth is more nuanced: many common favorites are perfectly fine in moderation, while a few surprising items spike potassium quickly.

Here are the main high-potassium foods to limit or avoid on a low-potassium diet:

• Potatoes and sweet potatoes: A medium baked potato contains around 900 mg of potassium — more than four times the low-potassium threshold.
• Tomatoes and tomato products: One cup of tomato sauce can pack over 800 mg. Fresh tomatoes are also high, though smaller amounts may be okay.
• Melons, oranges, and bananas: Cantaloupe, honeydew, oranges, and bananas are classic high-potassium fruits. A medium banana has about 420 mg.
• Dried fruits and beans: Raisins, dates, and baked beans are concentrated sources. Even half a cup of kidney beans exceeds 350 mg.
• Acorn squash, artichokes, and bamboo shoots: These vegetables are notably high. Baked acorn squash (1 cup) provides nearly 900 mg.

To bring high-potassium foods back within the 200 mg limit, you can sometimes reduce the serving size drastically. But for many of these items, the best strategy is swapping them for lower-potassium alternatives.

Fruits and Vegetables That Fit the Bill

The low-potassium fruit and vegetable list is long enough to keep meals colorful. Apples, berries, grapes, pineapple, and watermelon are all safe bets. On the vegetable side, green beans, cabbage, cauliflower, cucumber, and bell peppers work well.

Per WebMD’s guide to a low-potassium diet servings, you can aim for 1–3 servings of low-potassium fruits and 2–3 servings of low-potassium vegetables per day. That gives plenty of variety without worrying about potassium overload.

Here are common low-potassium fruits and vegetables with typical serving sizes:

Draining canned fruits and vegetables can further lower their potassium content. The liquid in the can absorbs some of the mineral, so rinsing and draining helps bring numbers down closer to fresh levels.

Grains, Proteins, and Dairy Alternatives

Building a low-potassium meal also means choosing the right starches and proteins. These are the steps that make the diet practical:

1. Choose refined grains over whole grains. White rice, white pasta, white bread, and cooked rice cereal are low in potassium. Whole wheat versions contain more, so stick with refined options for now.
2. Pick fresh poultry or fish. Fresh chicken and turkey breast, as well as fish like cod or tilapia, are low-potassium proteins. Avoid processed meats and canned fish with salt added.
3. Use unenriched rice milk instead of cow’s milk. Dairy milk has about 380 mg per cup. Unenriched rice milk contains less than 50 mg per cup, making it a safe swap.
4. Scan labels for potassium chloride. Some salt substitutes and packaged foods use potassium chloride in place of sodium. If you see it on the ingredient list, skip that product.
5. Keep a simple food journal. Tracking what you eat for a week helps you spot hidden sources of potassium and stay within your daily limits.

These steps make the low-potassium diet manageable. A food journal also helps you notice patterns — like which meals leave you satisfied without pushing potassium too high.

Putting It All Together: A Sample Low-Potassium Day

Seeing how these foods stack up in a real day can remove the guesswork. Below is a sample meal plan that stays within typical low-potassium guidelines. Exact potassium amounts depend on portion sizes and preparation methods.

The Cigna resource on less than 200 mg potassium per serving provides additional food ideas. Use it as a reference when building your own menu.

This day includes roughly 1,500–1,800 mg of potassium total, depending on exact portions. Many renal diets limit total potassium to around 2,000–3,000 mg per day, so this sample leaves room for small adjustments.

The Bottom Line

A low-potassium diet focuses on foods under 200 mg per serving — apples, berries, green beans, white rice, and fresh poultry are safe staples. Avoid high-potassium foods like potatoes, tomatoes, melons, and dried beans. Draining canned produce and skipping potassium chloride help keep intake in check.

Potassium needs vary by kidney function stage and medication use. Your nephrologist or renal dietitian can tailor these food lists to your specific lab values and health goals, so bring this guide to your next appointment for discussion.