We associate testosterone with muscle mass, energy, and sex drive, but did you know it's also crucial for your mood? 

From ashwagandha to fenugreek, we explore whether traditional medicines and supplements really can give your testosterone levels a boost.

Which is the better measure of your T levels — total or free?

Odds are your grandad had higher testosterone levels than you — but why?

We analysed over 20,000 testosterone results across the UK — which region has the lowest testosterone levels, and why is this relevant?

Testosterone levels drop naturally with age — but what’s a normal rate of decline?