Is It Too Late to Get a Flu Shot?

Dear Lifehacker,
It seems like everyone I know is sick, and I can't afford the time off work if I come down with something. I'm trying to eat and sleep well and wash my hands often, but now I'm regretting that I didn't get a flu shot this year. Is it too late? » 1/07/15 3:44pm 1/07/15 3:44pm

What Is Cholesterol and Why Should I Care About It?

Dear Lifehacker,
I don't know much about cholesterol, other than it's in foods and I don't want high levels of it in my body. But what is it, exactly? What does it do and why do I need to care about it? » 12/03/13 5:22pm 12/03/13 5:22pm

What Can I Do with a Smartwatch and Should I Get One?

Dear Lifehacker,
I keep seeing new “smartwatches” show up on gadget sites, but they all seem pretty different. What is a smartwatch, exactly, and should I consider buying one? » 6/17/13 2:49pm 6/17/13 2:49pm