Peer-reviewed research concerning coffee, summarized and appraised in plain language with every source cited.
This study set out to explore how coffee, exercise, and sleep relate to semen quality in men. It surveyed 3,302 men aged 18-60, collecting semen samples and lifestyle data through…
This study tested how different doses and timing of caffeine affect sleep in men who usually drink moderate amounts. It compared a placebo, 100 mg, and 400 mg of caffeine…
This study set out to see whether a regular daytime coffee habit disturbs sleep in young men who already drink it. Twenty men went through three 10 day conditions, daily…