Kidney Diet 7 min read·Updated 22 July 2026 Clinician-reviewed

Are Almonds Bad for Your Kidneys?

A UK Consultant Nephrologist on almonds in chronic kidney disease — a nutrient-dense nut with high oxalate that requires portion discipline, especially for kidney-stone formers.

  • Clinically Reviewed
  • NHS & NICE Aligned
  • UK Evidence-Based
  • Last Reviewed 22 July 2026

Professor Mohammed Mahdi Althaf

Consultant Nephrologist & Acute Physician

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Professor Mohammed Mahdi Althaf

MD, MSc, PgDip (Clin Ed), FRCP, FHEA, FASN

Consultant Nephrologist & Acute Physician · GMC 7216325

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Direct answer

A 15 g portion (10–15 almonds) is renal-friendly for most CKD stages. Almonds are the highest-oxalate common nut — stone formers should limit and pair with calcium. Choose unsalted, dry-roasted or raw.

Key recommendation: Per 15 g (10–15 almonds): ~ 110 mg K, ~ 72 mg P, ~ 3 g protein.

Quick answer

✓ Best choices

  • Vegetables and lower-potassium fruit at every meal
  • Whole grains: oats, basmati rice, pasta, wholegrain bread
  • Lean protein in modest portions: fish, chicken, eggs, tofu
  • Extra virgin olive oil, herbs and spices for flavour

✓ Foods to limit

  • Added salt and salty sauces
  • Processed meats and foods with phosphate additives (E338–E452)
  • Very large portions of bananas, oranges, potatoes if potassium is rising

Key takeaway

A 15 g portion (10–15 almonds) is renal-friendly for most CKD stages. Almonds are the highest-oxalate common nut — stone formers should limit and pair with calcium. Choose unsalted, dry-roasted or raw.

Who should be cautious

People on dialysis, post-transplant, pregnant or breastfeeding, or taking prescription medication — confirm with your renal team before changes.

Are Almonds Bad for Your Kidneys?

Almonds and kidney stones

Calcium-oxalate stones account for ~ 80% of UK kidney stones. Almonds are one of the most oxalate-dense foods (more than spinach gram for gram). If you have ever passed a stone, treat almonds like spinach — small portions, paired with calcium at the same meal so oxalate binds in the gut before absorption.

CKD without stones

For people with CKD but no stone history, a 15 g portion daily is renal-friendly and delivers vitamin E, magnesium and unsaturated fat. Avoid salted, honey-roasted or chocolate-coated almonds — they add sodium, sugar and saturated fat. Dry-roasted unsalted (Sainsbury's, Whitworths) is the cleanest UK option.

Practical CKD-friendly ideas

  • 10 raw almonds with an apple as an afternoon snack.
  • Flaked almonds (~ 5 g) over porridge or rice pudding.
  • Small handful in a renal-friendly trail mix (no raisins).
  • Avoid: almond croissants, marzipan, salted almonds at the pub, large almond-flour baking portions.
Are Nuts Bad for Your Kidneys?
Related reading: Are Nuts Bad for Your Kidneys?.

Key practical tips

Designed for quick scanning — what to order, what to avoid, sensible portions, common mistakes.

  • Read labels: sodium ≤ 0.3 g per 100 g (low) is the target
  • Cook from scratch when you can — it controls the hidden salt and phosphate
  • Personalise potassium and phosphate targets with your renal dietitian

Clinical guidance

TL;DR summary

A 15 g portion (10–15 almonds) is renal-friendly for most CKD stages. Almonds are the highest-oxalate common nut — stone formers should limit and pair with calcium. Choose unsalted, dry-roasted or raw.

Key takeaways
  • Per 15 g (10–15 almonds): ~ 110 mg K, ~ 72 mg P, ~ 3 g protein.
  • Highest oxalate of common nuts (~ 469 mg/100 g).
  • Pair with calcium foods if stone-prone.
  • Choose unsalted dry-roasted, not honey-roasted or salted.
  • Watch fortified almond milk for additive phosphate.
Kidney Diet & Nutrition Considerations

On a kidney-friendly diet, single foods matter less than the overall pattern. Build meals around vegetables, lower-potassium fruit, whole grains, sensible protein and olive oil, and watch the three usual suspects — salt, phosphate additives and oversized portions of very high-potassium foods. Targets are individual and should be confirmed with your renal team.

Foods to prioritise

  • Vegetables and lower-potassium fruit at every meal
  • Whole grains: oats, basmati rice, pasta, wholegrain bread
  • Lean protein in modest portions: fish, chicken, eggs, tofu
  • Extra virgin olive oil, herbs and spices for flavour

Foods to limit

  • Added salt and salty sauces
  • Processed meats and foods with phosphate additives (E338–E452)
  • Very large portions of bananas, oranges, potatoes if potassium is rising

Potassium, phosphate and protein needs vary between individuals — please confirm personal targets with your renal team or dietitian. Browse the Kidney Diet Hub for more guides in this cluster.

Frequently asked questions

Are almonds bad for kidneys?

In small portions (10–15 almonds, ~ 15 g) almonds are renal-friendly. The catch is calcium-oxalate kidney stones — almonds are one of the highest-oxalate foods. Stone formers should be cautious; people with CKD without stone history can include a modest portion.

Are almonds high in potassium and phosphate?

Per 100 g: ~ 733 mg K and ~ 481 mg P — both high. A 15 g portion (10–15 almonds) gives ~ 110 mg K and ~ 72 mg P, which fits most CKD diets. Portion control is the single most important rule.

Do almonds cause kidney stones?

Almonds contain ~ 469 mg oxalate per 100 g — the highest of common nuts. If you have a history of calcium-oxalate stones, limit to 5–10 almonds per day, pair with calcium (yoghurt, milk), and drink 2 L of water daily. Almond butter and almond flour carry the same oxalate load.

Is almond milk OK for CKD?

Unsweetened, unfortified almond milk is low in K and P per serving — but most UK brands fortify with calcium phosphate (an additive phosphate that is ~ 90% absorbed). Read the label and choose 'no added phosphate' versions where possible.

What foods are best for kidney health?

A kidney-friendly diet centres on vegetables, lower-potassium fruit (apples, pears, berries), whole grains (oats, basmati rice, pasta), sensible portions of fish, eggs or lean meat, beans and lentils in modest portions, and olive oil as the main cooking fat — broadly a Mediterranean pattern with reduced salt.

Nutritional challenges in kidney disease

Many people living with kidney disease have to limit foods because of potassium, phosphate, diabetes, dialysis, appetite changes or simply the time it takes to cook from scratch every day. That can make it harder to keep daily nutrition balanced — particularly for vitamins and minerals that food alone may not fully cover.

Kidney Vitality is a UK-formulated daily nutritional support product designed by Consultant Nephrologist Professor Mohammed Mahdi Althaf with renal nutrition in mind from the start. It keeps doses moderate, leaves out added potassium, phosphate and magnesium, and avoids megadose vitamin A — sitting alongside a kidney-friendly diet, not replacing it.

Why Kidney Vitality fits this need

Built around UK renal guidance

Aligned with NICE NG203, KDOQI 2020, and BDA renal nutrition guidance.

Designed by a UK Consultant Nephrologist

Formulated and reviewed by Professor Mohammed Mahdi Althaf (GMC 7216325).

Evidence-based by design

No added potassium or phosphate; sensible vitamin doses.

Designed by a UK Consultant Nephrologist

Ready to support your kidney health?

If you have been researching kidney health, supplements, CKD nutrition or kidney-friendly living, Kidney Vitality was developed specifically around those principles by Professor Mohammed Mahdi Althaf (GMC 7216325). Nephrologist Developed Daily Multivitamin.

  • No Added Potassium
  • No Added Phosphorus
  • No Added Iron
  • UK Manufactured
  • One capsule daily
  • UK GMP — BRCGS, NSF GMP, Halal
Subscribe & Save — £20.39/monthCheck your current multivitamin

✓ Free UK tracked delivery  ·  ✓ Delivered every 30 days  ·  ✓ Pause or cancel anytime  ·  ✓ Never run out

ComparisonKidney VitalityTypical high-street multivitamin
Added potassiumNoneOften included
Added phosphateNoneOften included (E338–E452)
Vitamin A (retinol)No megadoseOften high-dose retinol
Kidney-focused formulationYesNo — general population
Consultant Nephrologist involvementYes (GMC 7216325)No
UK GMP manufacturedYes (BRCGS, NSF GMP)Varies

Food supplement. Not a medicine and not a treatment for kidney disease. Speak with your GP, pharmacist or renal team before starting any new supplement, especially in advanced CKD, on dialysis, post-transplant, pregnant or breastfeeding.

Clinical reviewer

Professor Mohammed Mahdi Althaf

Consultant Nephrologist

Acute Physician

GMC 7216325

View Full Biography

Professor Mohammed Mahdi Althaf is a UK Consultant Nephrologist and Acute Physician with a special interest in chronic kidney disease, AKI prevention and renal nutrition. He combines hospital practice with patient education and clinical guidance review.

View professional profile →
View Credentials
  • MD
  • MSc
  • PgDip (Clin Ed)
  • FRCP
  • FHEA
  • FASN

About this article

Written for UK patients and based on:

  • NICE guidance
  • NHS resources
  • British Dietetic Association guidance
  • Kidney Care UK resources
View methodology

Each article is researched against current UK clinical guidance (NICE NG203, NG118, NG136), NHS patient resources, KDIGO and KDOQI international guidelines, and the British Dietetic Association Renal Nutrition Group. Drafts are written by the Kidney Vitality editorial team and reviewed by a UK Consultant Nephrologist before publication. Content is reviewed on a rolling basis and updated when guidance changes.

Editorial standards

  • Clinically reviewed
  • NHS-aligned
  • NICE-aligned
  • Evidence-based
  • Reviewed before publication
View full editorial process

Every article is researched and written by the Kidney Vitality editorial team using current UK clinical guidance (NICE NG203, NG118, NG136), NHS patient resources, KDIGO/KDOQI international guidelines, and British Dietetic Association renal nutrition guidance. Drafts are reviewed for clinical accuracy by Professor Mohammed Mahdi Althaf, MD, MSc, PgDip (Clin Ed), FRCP, FHEA, FASN (Consultant Nephrologist & Acute Physician, GMC 7216325) before publication. Content is updated when UK guidance changes.

References (4)View Sources
  1. NICE NG203: Chronic kidney disease — assessment and management
  2. KDIGO 2024 Clinical Practice Guideline for the Evaluation and Management of CKD
  3. KDOQI Clinical Practice Guideline for Nutrition in CKD: 2020 Update
  4. British Dietetic Association — Renal Nutrition Group

Medical disclaimer

This content is educational only and does not replace personalised medical advice.

Read full disclaimer

This page is general information, not personal medical advice. If you have chronic kidney disease, are on dialysis, have had a kidney transplant, are pregnant or breastfeeding, or take prescription medication, please confirm any supplement with your GP, pharmacist or renal team before starting.

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