I love my morning coffee, so I “perk up” whenever I see a study that suggests this habit is a good thing! Are you a coffee lover too? Then read on…
Overall, coffee drinkers were found to have more health benefits than risks from their habit, compared to those who did not drink any coffee. The average daily intake in those who were studied was 3 to 4 cups per day compared to no coffee daily, although some studies looked at how health changed in the years after people increased or decreased their coffee intake by a cup or two.
5 Benefits of coffee
Coffee and diabetes—a 2014 study followed over 123,000 people for 4 years. Those who increased their daily coffee intake by 1 cup per day had an 11% lower chance of developing Type 2 diabetes. Those who decreased their coffee consumption (by an average of 2 cups per day) had a 17% higher risk for Type 2 diabetes. Changes in tea drinking were not linked to diabetes risk.
Coffee and Parkinson’s disease—Several studies suggest that caffeine, whether in coffee or other drinks, may help decrease risk of developing Parkinson’s. One analysis determined that men who drink 4 or more coffees per day may have 1/5 the risk of those who do not. Another study in 2012 suggests that the caffeine in coffee may help control movement in people with Parkinson’s. Another study in 2017, that found a link between coffee intake and Parkinson’s, also noted coffee drinkers may be less likely to develop depression and dementias like Alzheimer’s as well. However, there wasn’t evidence to show that drinking decaf coffee would help prevent Parkinson’s.
Coffee and liver diseases—Researchers in Italy found that coffee decreases risk of liver cancer by about 40%. Their numbers suggest those who drink 3 cups a day may have 50% decreased risk of liver cancer. A different literature review in 2019 concluded that “coffee intake probably reduces the risk of liver cancer”. Another large analysis in 2017 found coffee also appeared to decrease risk of non-alcoholic fatty liver disease and cirrhosis, as well as liver cancer.
Coffee and heart health—We often think negatively of coffee when it comes to heart health, since people are advised not to drink it just before measuring their blood pressure. But drinking coffee in moderation, two 8-ounce servings per day, may protect against heart failure (when the heart can’t pump enough blood to meet the body’s needs), according to a 2012 study. They found an 11% lower risk of heart failure in those who drank this moderate amount versus those who drank none. Another analysis in 2017 found that those who drank 4 to 6 cups of either caffeinated or decaf coffee daily appeared to have a lower risk of Metabolic Syndrome—in other words, they had lower blood pressure, lower blood cholesterol, and lower blood sugar—and this included a decreased occurrence of Type 2 diabetes.
Overall health—An umbrella study in 2017, using combined data from 218 other analyses of studies, found coffee consumption seems generally safe within usual daily amounts. It showed the largest risk reduction in those who drank 3 to 4 cups daily and that coffee is more likely to benefit health than harm it. Mortality from any cause was reduced by 17% in these coffee drinkers.
An exception to the benefit of coffee is during pregnancy, when drinking more coffee could result in low birth weight of the baby (31% greater relative risk), increased risk of pregnancy loss (an increase of 46%) and increased chance of preterm birth (12-22%). Another exception is for women at risk of bone fractures (but not men for some reason…). Increased coffee was associated with an increased risk of breaking a bone only in women. Their recommendation was for women already at risk of a bone fracture to avoid coffee.
So, I guess I can happily continue my morning coffee—no risk of pregnancy for me and my risk of bone fracture is low! I usually enjoy 3 cups as I peruse the morning news and emails, and check Facebook for photos of what my wonderful granddaughters are up to! Hmmm…must be time for cup #3…
PLEASE NOTE: A little clarification on the numbers in this blog. The percentages in this article are “relative risk” numbers not overall risk. They compare risk with the factor to risk without it. For example, a relative risk increase of 50% could mean 10% without the risk factor have the condition compared to 15% with it…or 0.01 vs 0.015%. “Actual risk” numbers were not quoted in my references, only the percentage increase in risk.)
References:
Health benefits and risks of drinking coffee https://www.medicalnewstoday.com/articles/270202.php#benefits
Changes in coffee intake and subsequent risk of type 2 diabetes: three large cohorts of US men and women https://link.springer.com/article/10.1007%2Fs00125-014-3235-7
Coffee consumption and health: umbrella review of meta-analyses of multiple health outcomes https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5696634/
