One Woman Quits Coffee for Six Weeks to Test Its Health Effects

A 60-year-old British woman ran a six-week self-experiment to measure coffee's real impact on her own body.

Drinking four to five cups of coffee a day may cut liver cancer risk by 47 percent — yet the same habit can raise blood pressure, spike anxiety, and wreck sleep. That contradiction is what pushed Claudia Connell, a 60-year-old journalist and self-described coffee lover, to test coffee's effects on herself rather than rely on conflicting headlines. Connell had ramped up her daily consumption after buying a £600 barista-style home espresso machine. Concerned about whether the habit was quietly harming her health, she quit coffee entirely for six weeks and built a monitoring system around the experiment. Before stopping, she paid £119 for an Advance Diet and Lifestyle Blood Test that screens 27 biomarkers, including liver and kidney function, cholesterol, and key vitamins and minerals. Alongside the blood panel, she used an at-home blood pressure monitor and an Oura Ring — a wearable that tracks sleep patterns, resting heart rate, and stress levels — to capture daily changes during the abstinence period. The plan was to compare readings taken while drinking coffee against those gathered after six weeks without it. Research on caffeine pulls in opposing directions: population studies link moderate coffee drinking to reduced liver disease and certain cancers, while clinical data also ties it to temporary cardiovascular strain and disrupted sleep architecture. Connell's self-experiment was designed to see which effects, if any, showed up in her own measurable biomarkers.

Why it matters

Coffee is one of the world's most widely consumed beverages, yet the scientific literature on its health effects remains genuinely mixed, making personal and public health guidance difficult. Self-tracking experiments like this one reflect a growing trend of individuals using consumer health technology to gather their own evidence.

What's next

The sources do not report the final results of Connell's six-week experiment.

Key facts

• Claudia Connell is 60 years old and drinks several cups of coffee per day
• She invested £600 in a barista-style espresso machine, which increased her consumption
• Her pre-experiment blood test cost £119 and screened 27 biomarkers
• One cited study found four to five daily coffees reduce liver cancer risk by 47 percent
• She used an Oura Ring to track sleep, heart rate, and stress across the six-week period
• Research also links caffeine to increased anxiety, disrupted sleep, and temporary blood pressure spikes

Bias & framing notes

Both sources originate from the same outlet (headtopics) and appear to describe the same first-person feature article, meaning there is effectively only one underlying source. Source 2 is a near-identical summary of Source 1 with no additional reporting or independent verification. No peer-reviewed studies are cited directly, and the '47 percent' liver cancer figure is referenced without attribution to a specific publication.