For some people, moderate coffee intake may temporarily boost focus and energy regulation. However, frequent high intake—especially on an empty stomach or during periods of stress—may contribute to heightened cortisol levels, which can affect mood stability and energy fluctuations throughout the day.
Over time, regular consumers often develop a tolerance, meaning the hormonal spikes become less intense, but sensitivity can still vary widely from person to person.
Heart: Circulation and Stimulation
Coffee has a complex relationship with heart health. In the short term, caffeine can increase heart rate and blood pressure slightly due to its stimulating effects. This is usually temporary and tends to be more noticeable in people who don’t consume caffeine regularly.
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