Partly. Depends on dose and person.

Most evidence is observational, so it cannot prove causation, but it is consistent across many large studies and populations, and randomized trials show no major harm at moderate intake. IARC removed coffee from its list of possible carcinogens in 2016. Effects vary by individual because of genetic differences in caffeine metabolism, and by what is added to the coffee. Excess intake, late-day drinking, or certain conditions (pregnancy, arrhythmias, anxiety, reflux) can make coffee a poor choice for some people, but for the typical adult it is not bad for health and may be mildly beneficial.

• Large cohort studies and meta-analyses link 3 to 4 cups a day with lower all-cause mortality and lower risk of type 2 diabetes, Parkinson's disease and liver disease.
• Health authorities such as the EFSA and FDA consider up to about 400 mg of caffeine a day (around 4 cups) safe for most healthy adults.
• Pregnant people are advised to limit caffeine to about 200 mg a day.
• Caffeine can cause insomnia, anxiety, jitteriness and raised heart rate in sensitive people.
• Unfiltered coffee (e.g. French press) can modestly raise LDL cholesterol, and added sugar and cream can make coffee drinks unhealthy.

Extensive nutritional epidemiology consistently shows that moderate coffee consumption is not harmful to the general population and is instead associated with neutral to positive long-term health outcomes. Coffee contains caffeine and numerous bioactive polyphenol compounds that contribute antioxidant and anti-inflammatory properties. Risks are primarily dose-dependent or specific to sensitive populations, such as individuals with caffeine sensitivity, certain cardiac arrhythmias, or pregnant people who metabolize caffeine more slowly.

• Moderate coffee consumption is typically defined as 3 to 5 standard cups per day (up to 400 mg of caffeine).
• Large observational studies link regular coffee drinking to lower risks of type 2 diabetes, cardiovascular disease, and all-cause mortality.
• Coffee is a major dietary source of antioxidants, including chlorogenic acids.
• Health authorities recommend that pregnant individuals limit caffeine intake to 200 mg per day or less.
• High doses of caffeine can cause jitteriness, elevated heart rate, digestive distress, and sleep disruption.

The worldwide evidence is broad and consistent: coffee itself is not inherently harmful at moderate doses, and observational data even suggest modest benefits for some outcomes, though these are associations and not proof of causation. Harm is dose- and person-dependent — very high caffeine intake, pregnancy, slow caffeine metabolism, anxiety, arrhythmias, GERD, and poor sleep are situations where coffee can genuinely cause problems. So the honest answer is 'partly — it depends on how much and for whom,' with strong evidence underpinning the general picture.

• Large cohort studies and umbrella reviews associate moderate coffee intake (about 3–5 cups/day) with neutral-to-lower risk of all-cause mortality, type 2 diabetes, and cardiovascular disease.
• Regulators such as the FDA and EFSA consider up to about 400 mg of caffeine per day (roughly 4 cups of coffee) safe for healthy non-pregnant adults.
• Pregnancy guidance is much lower: about 200 mg/day (roughly 1–2 cups), due to links with low birth weight and miscarriage risk.
• High intake or individual sensitivity can cause insomnia, anxiety, palpitations, reflux, and withdrawal headaches.
• Unfiltered coffee (French press, boiled) contains diterpenes that raise LDL cholesterol; paper-filtered coffee removes most of them.

Research indicates that coffee consumption has a complex relationship with health. Moderate intake is linked to several protective effects, such as improved cognitive function and reduced risk of certain chronic diseases. However, excessive consumption can lead to adverse effects like insomnia, elevated heart rate, or digestive problems. Individual factors, such as genetics, overall diet, and pre-existing health conditions, play a significant role in determining whether coffee is beneficial or harmful. For most healthy adults, moderate coffee consumption is considered safe and may even be advantageous.

• Moderate coffee consumption (3-4 cups/day) is associated with reduced risks of type 2 diabetes, Parkinson's disease, and liver disease.
• Excessive coffee intake (over 4 cups/day) may cause insomnia, increased heart rate, or digestive issues.
• Caffeine sensitivity varies; some individuals may experience anxiety or jitters even with small amounts.
• Pregnant women are advised to limit caffeine intake to 200 mg/day (about 1-2 cups) due to potential risks.
• Coffee contains antioxidants, which may contribute to its health benefits.