Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. May 1, 2026 Add as a ...

Steffini Stalos, DO, FCAP, is a pathology and lab medicine physician. She is also the chief medical officer of the lab consultancy firm Blood Associates, LLC. Hand sanitizer expires after about 2.5 ...

Katrina Carter, DPT, FNS, is a licensed travel physical therapist. She specializes in orthopedics and has a passion for providing education on nutrition for healing and overall health and wellness.

Basal metabolic rate (BMR) is the minimum number of calories your body burns at rest for basic functions like breathing, circulation, and cell production. You can estimate it using the Harris-Benedict ...