What to Eat for Kidney Health: A Dietitian’s Guide to Getting Started

Learn how to protect and support your kidneys with practical nutrition tips from a registered dietitian. This beginner-friendly guide covers the best foods for kidney health — and what to limit — no matter where you are on your journey.

Written by Danielle Gersmehl, RD LDN

Why Kidney Nutrition Matters

Your kidneys play a crucial role in your body — filtering waste, balancing fluids, and supporting blood pressure and bone health. But when your kidneys are under stress or not functioning at full strength, nutrition becomes even more important.

As a registered dietitian specializing in kidney health, I help people with all types of kidney concerns — including chronic kidney disease (CKD), kidney stones, dialysis, transplant, and early-stage concerns — use food to feel better and protect their long-term health.

What to eat for Kidney Health?

There’s no one-size-fits-all kidney diet, but here are some commonly recommended kidney-friendly foods:

Fruits & Vegetables (low in potassium)

• Blueberries, apples, cabbage, cauliflower, bell peppers

• Rich in antioxidants and fiber without overloading potassium

Whole grains (in moderation)

• White rice, oats, couscous, lower-phosphorus breads

• Provide energy and fiber without burdening the kidneys

Healthy fats

• Olive oil, avocado (in small amounts), flaxseed

• Help reduce inflammation and support heart health

Lean proteins (as appropriate for your kidney stage)

• Chicken, eggs, tofu, fish

• Focus on the right amount — not too much, not too little

Herbs and spices

• Garlic, onion powder, lemon juice, rosemary

• Add flavor without relying on salt

What to Limit or Watch Out For

Your individual needs may vary, but common nutrients to monitor include:

Sodium – Found in processed foods, canned soups, deli meats

Phosphorus – In dark colas, processed cheese, packaged baked goods

Potassium – May need to be limited in later stages of CKD

Protein – Too much can stress the kidneys; balance is key

Oxalates – For stone formers, limit spinach, almonds, and beets

How to Personalize Your Kidney Nutrition

The most important thing to know? Your kidney nutrition plan should be tailored to you.

What’s right for someone with early-stage CKD might not be right for someone on dialysis — and vice versa. That’s where working with a registered dietitian can help you cut through the confusion and get a plan that fits your life.

Final Thoughts

Eating for kidney health doesn’t have to be complicated or restrictive. With a few simple swaps and expert guidance, you can feel more confident, more energized, and more in control of your health.

Ready to work with a Dietitian who specializes in kidney nutrition? Book your first session here.