Research from former Google technicians might put a damper on your morning cup of Joe.

While we believe coffee gives us a needed boost at work, it actually may be killing our productivity.

According to two former techs at Google, you don’t need your first boost of caffeine until 9:30 a.m.

They also suggest having your second cup before you hit that lull – so don’t wait until you think you need it.

If you do wait too long for that second cup, the techs recommend drinking coffee and taking a 15-minute nap.