Your kidneys work tirelessly behind the scenes — filtering around 180 litres of blood every single day, removing waste, balancing fluids, and helping regulate blood pressure. Yet most of us never give them a second thought until something goes wrong. After 50, kidney function naturally begins to decline, and the risk of chronic kidney disease (CKD) rises significantly. The good news? There is a great deal you can do to protect your kidneys and catch any problems early.
TL;DR
- Kidney function naturally declines after 50, but lifestyle changes can significantly slow this process and reduce the risk of chronic kidney disease (CKD).
- High blood pressure and type 2 diabetes are the two biggest risk factors for kidney disease in Ireland — managing both is essential for kidney protection.
- Early-stage kidney disease often has no symptoms at all, making regular GP check-ups and blood/urine tests vital for early detection.
- Staying well hydrated, reducing salt intake, and reviewing medications with your pharmacist are simple, practical steps you can take today.
- The HSE, Irish Kidney Association, and your GP provide free or subsidised supports including screening, dietary advice, and peer support groups across Ireland.
Why Kidney Health Matters More After 50
From around the age of 40, kidney filtration rate (known as eGFR) declines by roughly 1% per year. By the time you reach your 60s or 70s, your kidneys may be working at 60–70% of their youthful capacity — and that is considered normal. The concern is when this decline accelerates due to other health conditions or lifestyle factors.
In Ireland, chronic kidney disease affects an estimated 1 in 10 adults, though many are unaware they have it. According to the Irish Kidney Association, approximately 5,500 people are currently receiving treatment for kidney failure, with thousands more living with earlier stages of the disease. TILDA (The Irish Longitudinal Study on Ageing) research has consistently shown that reduced kidney function is closely linked to cardiovascular risk, cognitive decline, and reduced quality of life in older adults.
The Biggest Risk Factors
Understanding what puts your kidneys at risk is the first step towards protecting them. The two leading causes of kidney disease in Ireland — and worldwide — are:
- High blood pressure (hypertension): Sustained high blood pressure damages the tiny blood vessels in your kidneys over time, reducing their ability to filter effectively. If you have been diagnosed with hypertension, keeping it well managed is one of the single best things you can do for your kidneys.
- Type 2 diabetes: High blood sugar damages the kidneys’ filtering units. In Ireland, the prevalence of type 2 diabetes has been rising steadily, particularly among adults over 50. If you have diabetes, regular kidney function tests should be part of your annual review.
Other risk factors include a family history of kidney disease, smoking, obesity, regular use of anti-inflammatory painkillers (NSAIDs like ibuprofen), and a history of urinary tract infections or kidney stones.
The Silent Nature of Kidney Disease
One of the most challenging aspects of kidney disease is that it is often completely silent in its early stages. You can lose up to 90% of your kidney function before experiencing noticeable symptoms. When symptoms do appear, they may include:
- Unusual fatigue or difficulty concentrating
- Swollen ankles, feet, or hands
- Changes in urination — more frequent, foamy, or darker than usual
- Persistent itching
- Nausea or loss of appetite
- Shortness of breath
Because these symptoms overlap with many other conditions, the only reliable way to check your kidney health is through a simple blood test (measuring creatinine and eGFR) and a urine test (checking for protein). Your GP can arrange both.
Practical Steps to Protect Your Kidneys
1. Get Checked Regularly
If you are over 50, ask your GP to include kidney function in your routine blood work. This is especially important if you have high blood pressure, diabetes, or a family history of kidney problems. Under the HSE’s chronic disease management programme, adults with certain conditions can access structured reviews that include kidney function monitoring at no additional cost with a GP visit card or medical card.
2. Manage Blood Pressure and Blood Sugar
If you have been prescribed medication for hypertension or diabetes, take it consistently. Even small improvements in blood pressure control can significantly reduce the strain on your kidneys. The HSE recommends a target blood pressure of below 140/90 mmHg for most adults, though your GP may set a different target based on your individual circumstances.
3. Stay Well Hydrated
Your kidneys need adequate fluid to function properly. Aim for 6–8 glasses of water or other fluids daily, though you may need more in warm weather or if you are physically active. Tea and coffee count too — the old myth that caffeine dehydrates you has been largely debunked. However, try to limit sugary drinks and excessive alcohol, both of which can burden the kidneys over time.
4. Watch Your Salt Intake
The average Irish adult consumes around 10g of salt per day — well above the recommended maximum of 6g (about one teaspoon). Excess salt raises blood pressure and forces the kidneys to work harder. Most dietary salt comes from processed foods, bread, and ready meals rather than the salt cellar, so reading labels is key. Look for products with less than 1.5g salt per 100g.
5. Review Your Medications
Some common over-the-counter medications, particularly NSAIDs (ibuprofen, naproxen), can harm the kidneys if used regularly or in high doses. If you take these for arthritis or chronic pain, speak with your GP or pharmacist about kidney-friendly alternatives. Paracetamol is generally considered safer for the kidneys when used as directed. If you are managing multiple medications, your pharmacist can conduct a medication review — a free service available in many Irish pharmacies.
6. Eat a Kidney-Friendly Diet
A balanced diet rich in fruit, vegetables, whole grains, and lean protein supports kidney health. The Mediterranean-style diet, which emphasises plant-based foods, healthy fats, and moderate portions, has been shown to reduce CKD progression. If you have been diagnosed with kidney disease, a renal dietitian can provide tailored advice — ask your GP for a referral through the HSE.
7. Stay Active
Regular physical activity helps control blood pressure, blood sugar, and weight — all of which benefit the kidneys. The HSE recommends at least 150 minutes of moderate activity per week for adults over 50. Walking, swimming, cycling, and gardening all count. Even small increases in activity can make a meaningful difference.
Supports Available in Ireland
If you are concerned about your kidney health, or have been diagnosed with CKD, there are excellent supports available:
- Your GP is your first port of call for screening, monitoring, and referrals. The HSE chronic disease management programme covers kidney function testing for eligible patients.
- The Irish Kidney Association (IKA) provides peer support, counselling, holiday dialysis coordination, and patient information. Their helpline and local branches are invaluable resources for anyone living with kidney disease.
- HSE renal services operate across Ireland’s hospital network, with specialist nephrology clinics available for those who need closer monitoring or treatment.
- Community pharmacies can help with medication reviews and blood pressure monitoring — many offer these services free of charge.
At Críonna Health, we believe that understanding your body’s changing needs is one of the most empowering things you can do as you age. Kidney health may not grab the headlines, but looking after your kidneys is a quiet, powerful investment in your overall wellbeing and independence.
Key Takeaway
Your kidneys are remarkably resilient, but they do need your help — especially after 50. A few simple steps — regular check-ups, staying hydrated, managing blood pressure, and being mindful of medications — can make all the difference. Talk to your GP, and take that first step today.
📷 Photo by Anton Maksimov 5642.su on Unsplash
