‘I drink black coffee daily’: Oncologist shares 6 research-backed benefits, from brain health to longevity

Black coffee, in particular, can be a relatively healthy choice when consumed without excess sugar or high-calorie additives. Oncologist Dr Vartika Vishwani shares in her 27 July Instagram post why she drinks black coffee every day, highlighting six potential benefits associated with regular coffee consumption.

1. May lower the risk of premature death

According to Dr Vishwani, research involving around 171,000 adults found that people who consumed 1.5 to 3.5 cups of coffee daily had about a 30% lower risk of death compared with those who did not drink coffee. However, such studies show an association and do not prove that coffee itself directly increases lifespan.

2. Could lower the risk of chronic diseases

Coffee consumption has also been associated with a lower risk of several chronic conditions, including heart disease, liver disease, type 2 diabetes and stroke. Dr Vishwani cited findings from more than 200 meta-analyses suggesting that consuming around three to four cups of coffee a day may be linked to a reduced risk of several chronic health conditions.

3. May support liver health

Your liver may also benefit from moderate coffee consumption. Coffee contains antioxidants and plant compounds that may help reduce inflammation and protect against liver damage. "Your liver loves coffee," Dr Vishwani wrote, noting that research has linked coffee consumption with a lower risk of fatty liver disease, cirrhosis, liver fibrosis and liver cancer.

4. May reduce the risk of type 2 diabetes

Coffee may also have a role in metabolic health. According to Dr Vishwani, studies suggest that every additional cup of coffee consumed daily is associated with a roughly 6-7 percent lower risk of developing type 2 diabetes. Compounds found in coffee, including chlorogenic acids and polyphenols, may help regulate inflammation, glucose absorption and insulin function.

5. May lower the risk of some cancers

Coffee has also been studied for its potential role in cancer prevention and outcomes. "Research suggests that coffee may even reduce the risk of certain cancers," Dr Vishwani wrote, pointing to studies linking coffee consumption with a lower risk of liver and endometrial cancers.

She also noted that observational studies have found better survival outcomes among some people with colorectal cancer who consumed coffee. These findings, however, do not establish coffee as a cancer treatment.

6. Could benefit brain health

The benefits may extend to the brain as well. Large observational studies have consistently found an association between coffee consumption and a lower risk of Parkinson's disease. Caffeine and other bioactive compounds in coffee are being studied for their potential protective effects on brain health.

Should everyone drink black coffee every day?

Not necessarily. Despite its potential benefits, coffee is not a miracle drink and may not be suitable for everyone. Dr Vishwani advised people with uncontrolled anxiety, certain heart rhythm disorders or existing medical conditions to speak with their doctor before increasing their coffee intake.

For healthy adults, up to about 400 mg of caffeine per day is generally considered a level that can be consumed without significant safety concerns, although individual tolerance varies. Depending on how strong the coffee is, this can amount to roughly 3-4 cups, but cup size and caffeine content can differ considerably.

The oncologist also stressed that coffee should complement, not replace, healthy lifestyle habits. "Coffee cannot replace good sleep. Coffee cannot replace exercise. Coffee cannot replace a healthy diet," she wrote.

So, if you enjoy your morning black coffee, there may be little reason to feel guilty about it. The key is moderation, individual tolerance and the overall quality of your diet and lifestyle.

Dr Vartika Vishwani is a Surgical Oncologist specialising in breast and gynaecological cancers. She holds an MBBS, MS in General Surgery and DNB in Surgical Oncology, and works as a Consulting Breast & Gynaecologic Oncosurgeon.

Note to readers: This article is for informational purposes only and not a substitute for professional medical advice. Always seek the advice of your doctor with any questions about a medical condition.