IT HAS seen many a Malaysian through exam season, late nights, empty wallets and broken hearts.
The humble packet of instant noodles is practically a food group in this country, with Malaysians putting away an estimated 3.6 million packets a day in 2025. That is a lot of ramen.
But somewhere between the third packet of the week and the gentle concern of a worried parent hovering nearby, a question arises. Can eating too much instant noodle really damage your kidneys?
Verdict:
TRUE, BUT...
The good news is that the occasional bowl of instant noodles is not going to send anyone's kidneys into early retirement.
The bad news is that eating them as a daily staple, seasoning sachet and all, is genuinely not doing those two hardworking organs any favours.
The main villain in the story is sodium, which is a fancy word for salt, and instant noodles have an almost impressive amount of it.
A peer-reviewed study published in Nutrients that analysed 765 instant noodle products from 10 countries found that a single packet can account for anywhere between 35% and 95% of the World Health Organisation's recommended daily sodium limit of 2,000mg in one sitting.
Products from middle-income countries, a category that includes Malaysia, record sodium levels nearly three times higher than those sold in wealthier nations.
To put that another way: eating one packet of instant noodles in Malaysia can, depending on the brand, deliver close to an entire day's worth of salt before a person has even had lunch.
So why does that matter for the kidneys specifically?
The kidneys are essentially the body's filtration system, quietly processing around 200 litres of blood every single day without complaint or recognition.
When there is too much sodium in the body, the kidneys have to work harder to flush it out, and in the process the body retains more fluid, which pushes up blood pressure.
Sustained high blood pressure then puts chronic stress on the tiny, delicate blood vessels inside the kidneys that do all the filtering, and over years that stress causes real, cumulative damage.
A meta-analysis published in PMC reviewing studies on sodium intake and kidney disease finds that high sodium consumption is significantly associated with an increased risk of developing chronic kidney disease in both people with high blood pressure and those with perfectly normal readings.
In other words, a person does not need to already be unwell for excess sodium to be a problem.
A 2025 study published in Frontiers in Nephrology, drawing on disease data from 204 countries spanning three decades, finds that deaths from chronic kidney disease linked to high sodium intake more than doubled globally between 1990 and 2021, and projects the situation will worsen further by 2040.
Sodium is not even the only concern lurking inside that familiar packet.
Instant noodles also contain phosphate additives in the seasoning sachet, used to improve texture and shelf life, and a 2025 peer-reviewed paper by researchers at the Karolinska Institutet in Sweden identifies these as a hidden source of phosphorus that is particularly problematic for people with existing kidney disease.
A separate study involving 103 healthy young adults finds that high noodle consumption is associated with elevated phosphorus levels in the blood, which is linked in other research to higher risks of cardiovascular events and complications in kidney disease patients.
For those who already have weakened kidneys, the danger is not gradual at all.
A Taiwanese kidney specialist in 2015 documented the case of an elderly couple with advanced chronic kidney disease whose conditions collapsed dramatically after just one week of eating nothing but instant noodles, with one partner's kidney function dropping from 21% to 15% and the other's plunging from 10% to 8.4%, putting both perilously close to needing dialysis.
The important context is that the research consistently points to habitual, high-volume consumption as the real risk, not the occasional emergency bowl at midnight.
A systematic review published in Frontiers in Nutrition in 2024 finds a 24% higher risk of chronic kidney disease among those with the highest regular intake of ultra-processed foods, of which instant noodles are a confirmed member.
Malaysians average 47 servings of instant noodles per person per year according to the World Instant Noodles Association, placing the country on par with Japan and comfortably in the territory where dietary habits are worth paying attention to.
Eaten occasionally, instant noodles are fine, but eaten every day they can quietly load the kidneys with more salt than they were ever designed to handle.
The kidneys ask for very little in return for everything they do.
Perhaps, just occasionally, they deserve a meal that does not come in a packet.
Sources:
1. https://pmc.ncbi.nlm.nih.gov/articles/PMC5490591/
2. https://pmc.ncbi.nlm.nih.gov/articles/PMC4723867/
3. https://pmc.ncbi.nlm.nih.gov/articles/PMC7369961/
4. https://pmc.ncbi.nlm.nih.gov/articles/PMC12399397/
5. https://pmc.ncbi.nlm.nih.gov/articles/PMC7844660/
6. https://pmc.ncbi.nlm.nih.gov/articles/PMC12073181/
7. https://www.nature.com/articles/s41430-025-01600-6
8. https://www.thestar.com.my/business/business-news/2015/11/02/ramping-it-up/
10. https://www.taipeitimes.com/News/taiwan/archives/2015/09/26/2003628644
