Is Coffee Good For Stress? New 2026 Study Reveals The Ideal Daily Limit For Mental Health

Anyone who’s gone a cup over their usual coffee limit will know it can sometimes lead to agitation and jitters. It can even mess with your sleep.

But a new study, which looked at the data from 461,586 people across a median of 13.4 years, has suggested that in the right amount, drinking coffee may actually lower your stress levels and is linked to reduced rates of mental health issues.

“J-shaped associations were identified between coffee consumption and mental disorders, suggesting that a moderate intake of coffee might be beneficial for mental health,” the paper, published in the Journal of Affective Disorders, said.

The researchers wanted to pick up on unfinished previous research, which looked at the link between coffee and anxiety and depression rates.

Using data from the UK Biobank, they looked at incidence rates of mood and stress disorders and compared it to self-reported coffee consumption.

They found that drinking two to three cups of coffee a day appeared to be linked to lower rates of these conditions.

That “protective effect” seemed stronger in men than women, the paper added.

The researchers speculated that this might be because of how drinking coffee affects inflammation biomarkers.

People who drank no coffee, or those who drank more than three a day, were more likely to have a mood or stress disorder on their records. And those who drank five or more cups of coffee a day appeared likeliest to experience mood or stress disorder.

However, this did not say that coffee definitely caused any of these associations; it just showed a link.

Speaking to HuffPost previously, Dr James Udelson, chief of cardiology at Tufts Medical Centre, said, “Three to four cups of coffee per day has been shown to be safe for most people and not associated with adverse effects on cardiovascular health or health in general”.

One study found that “moderate” coffee consumption (two to three cups a day) appears to be linked to lower dementia risk.

And it appears to be associated with a longer life and better heart health, too.

Coffee with no sugar or cream may be better for us, other studies have suggested.