The Decode

Your testosterone is made overnight: sleep, the daily cycle and the SHBG gene

Every hour of sleep you cut shows up in your testosterone the next morning. What large studies show,...

One gene, CYP1A2, helps decide how long your coffee stays in your system. Here's what it means for...

Four genes help decide how much vitamin D ends up in your blood. Carry the wrong mix and...

The alcohol flush is your body struggling to clear a toxic by-product of alcohol. Here's the gene behind...

MTHFR gets blamed for almost everything online. Here's what the gene actually does, how common the variant is,...

ACTN3 gets called the sprint gene. The research behind it is more interesting than the headline, and it...