Harvard Medical School and the National Kidney Foundation have conducted studies examining daily coffee consumption and its effect on kidney function, identifying both benefits and precautions for certain populations.

Among the benefits of moderate consumption of coffee we stand out its diuretic effects. Coffee acts as a mild diuretic, increasing glomerular filtration and promoting the elimination of fluids without risk of dehydration in moderate quantities.

Studies also indicate that regular coffee consumption could be related to a lower incidence of chronic kidney disease and a decreased risk of long-term kidney damage.

Precautions for sensitive groups

It is recommended that individuals with hypertension, hypotension, pregnancy, or low bone density consult a doctor before consuming coffee, as excess caffeine can cause complications.

Likewise, high caffeine consumption can be associated with risks such as low birthweight. Therefore, it is suggested that pregnant women limit their intake.

The study concludes that coffee can have protective effects against the formation of kidney stones, but it is suggested to limit coffee consumption to three or four cups daily as, which is considered safe for most adults. In addition, it is preferable to avoid additives that may compromise the beneficial effects of coffee on kidney health.

Effects of coffee according to its preparation

The differences in the effects of coffee depend mainly on the concentration of caffeine, bioactive compounds and the extraction method. tion. For example, espresso offers a more intense and fast impact, while filtering is milder, but with higher total caffeine.

Taste and body. Espresso coffee, prepared under high pressure, is more concentrated, with higher acidity, bitterness and dense body due to the rapidly-extracted oils and lipids ask. In contrast, filtered coffee (as pour-over or drip) is lighter, less acid and highlights complex and bright flavors, since the filter removes many oils.

Caffeine and energy. Although espresso seems stronger due to its concentration (in ~30 ml), a filtered cup (~250 ml) contains more total caffeine because the water spends more time in contact with the coffee. This generates a longer stimulating effect in the filtration, versus the quick shot of espresso.

Health and digestion. The filtered is easier to digest due to its lower acidity and astringency, with less sediment. Espresso, without package rgo, can raise more cholesterol (up to 0.16 mmol/l with 3-5 cups daily in men) by unfiltered compounds such as cafestol.

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