Caffeine is the world’s favorite stimulant, which fuel our morning and mid-day slums with coffee, tea and energy drinks. But while that daily cup (or three) keeps us awake and cautious, how does it affect our kidneys? According to experts, the answer is not as straight as you can think.

The head of nephrology at Manipal Hospital Sarjapur Road, Dr. Pallavi Patri says that medium caffeine intake has been linked to many kidneys related benefits. Studies show that a proper amount of caffeine is associated with lower risk of acute and chronic kidney disease. Additionally, it can help reduce kidney stone formation.

Dr. of Urology at KMC Hospital, Dr. Sanman Gowda, Dr. BR Ambedkar Circle Mangalore, Johns Hopkins, indicates for the research of Hopkins Medicine, showing that drinking at least one cup of coffee daily can reduce the risk of acute kidney injury due to antioxidant properties. It is also evidence that medium caffeine consumption (200–400 mg per day, about two cups of coffee) can provide protective benefits against chronic kidney disease (CKD).

While caffeine has its own upside, excessive intake can cause risk. Dr. Patri has warned that high levels of caffeine have been linked to the loss of urinary protein and the progression of kidney disease. Individuals with autosomal major polycystic kidney disease (adpkd) must be particularly cautious, as caffeine cysts can contribute to growth and progress of the disease.

Dr. Gowda highlighted another concern- the effect of caffeine at the level of potassium. Drinking three to four cups of coffee per day, especially with added milk or cream, can increase potassium levels, which can be problematic for individuals with kidney disease. Caffeine can also temporarily increase blood pressure, making it important for people with high blood pressure to moderate their intake, because high blood pressure, in turn, can reduce kidney function.

So, what is eligible as the “safe” amount of caffeine? It depends on individual metabolism and health conditions. Dr. Patri suggests that less than three cups a day is a proper guideline for most people. Meanwhile, Dr. Gowda refers to the recommendations from the National Kidney Foundation, advising people with high blood pressure to limit their intake to two cups per day.

It is also worth noting what happens in your coffee. While caffeine alone cannot be a major kidney health criminal, sugary syrup, excessive milk, and high-calorie cream, can increase the risk of diabetes and obesity, which affect both kidney function.

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