Renal Nutrition
Cardiovascular-Kidney-Metabolic Syndrome: What to Eat
The American Heart Association's 2023 Presidential Advisory on Cardiovascular-Kidney-Metabolic (CKM) Syndrome [1] reframes obesity, type 2 diabetes, chronic kidney disease, and atherosclerotic cardiovascular disease as a single biological continuum driven by visceral adiposity, insulin resistance, neurohormonal activation, and oxidative stress. Roughly 90% of US adults meet criteria for at least CKM stage 1, and ~15% are stage 3 or 4 [1]. The clinical implication is striking: a single dietary pattern can move all four risk axes simultaneously.
The four CKM stages at a glance
| Stage | Definition | Diet priority |
|---|---|---|
| 0 | No CKM risk factors | Prevent — Mediterranean baseline |
| 1 | Excess/dysfunctional adiposity | Reduce ultra-processed food, add fiber |
| 2 | Metabolic risk factors (HTN, hyperglycemia, dyslipidemia) or moderate-high risk CKD | DASH + sodium <2,300 mg, soluble fiber 10–15 g |
| 3 | Subclinical CVD in CKM, or high-risk CKD (eGFR <45 or albuminuria) | Add plant-forward protein at 0.6–0.8 g/kg if CKD 3b–4 |
| 4 | Clinical CVD in CKM | Mediterranean + cardiac rehab nutrition |
The four CKM-friendly anchors
- Sodium under 2,300 mg/day (1,500 if hypertensive) — each 1 g/day reduction lowers systolic BP ~2 mmHg [2]
- Plant-forward protein at 0.6–0.8 g/kg in CKD stages 3b–4; 1.0–1.2 g/kg without CKD [3]
- Soluble fiber 10–15 g/day (oats, psyllium, beans) — lowers LDL ~5–10% and improves glycemia [4]
- Mediterranean fats: extra-virgin olive oil, fatty fish 2x/week, nuts — PREDIMED cut major CV events ~30% [5]
What to limit
- Phosphate additives ('PHOS' on labels) — 90–100% bioavailable and linked to vascular calcification [6]
- Sugar-sweetened beverages — independently associated with CKD progression in NHANES and the Nurses' Health Study [7]
- Processed red meat — each 50 g/day raises CHD risk ~42% and CKD incidence ~22% [8]
- Refined carbohydrates with low fiber — drives postprandial glucose excursions that accelerate endothelial dysfunction
A one-day CKM-aligned plate
| Meal | Foods | Why it works |
|---|---|---|
| Breakfast | Steel-cut oats, berries, walnuts, cinnamon | Soluble β-glucan lowers LDL and postprandial glucose |
| Lunch | Lentil-quinoa bowl, roasted vegetables, olive oil-lemon | Plant protein + fiber + MUFA |
| Snack | Greek yogurt (low-sodium), pear | Protein + soluble fiber |
| Dinner | Baked salmon, double-boiled potato, sautéed greens | Omega-3s, potassium-managed starch |
References
- 1.Ndumele CE, et al. Cardiovascular-Kidney-Metabolic Health: A Presidential Advisory from the AHA. Circulation 2023. Read source ↗
- 2.He FJ, et al. Effect of longer-term modest salt reduction on blood pressure. Cochrane Database Syst Rev 2013. Read source ↗
- 3.Ikizler TA, et al. KDOQI Clinical Practice Guideline for Nutrition in CKD: 2020 Update. AJKD. Read source ↗
- 4.Brown L, et al. Cholesterol-lowering effects of dietary fiber: a meta-analysis. Am J Clin Nutr 1999. Read source ↗
- 5.Estruch R, et al. Primary Prevention of CVD with a Mediterranean Diet (PREDIMED). NEJM 2018. Read source ↗
- 6.Calvo MS, Uribarri J. Public health impact of dietary phosphorus excess. Am J Clin Nutr 2013. Read source ↗
- 7.Rebholz CM, et al. Dietary acid load and incident CKD: NHANES. Am J Nephrol 2015. Read source ↗
- 8.Lew QJ, et al. Red meat intake and risk of ESRD. JASN 2017. Read source ↗
About the author
Swetha Raju
Columbia M.S. Candidate in Clinical Human Nutrition · NKF peer mentor · CKD patient advocate · Published nutrition researcher
Swetha Raju is the founder of NephroNourish. As a published researcher and lifelong chronic disease patient, she translates renal nutrition science into practical guidance people can actually use.
A note on scope. This article is educational and not individual medical advice. Always discuss changes with your nephrologist, dietitian, or care team.