Red-light devices are all over social feeds and make enormous promises. From the many, we find the few that are actually worth your commitment, time, and money.

Red dye 3, also known as red No 3 or erythrosine, is a synthetic dye derived from petroleum, sometimes used to give food and drink products a bright colour. The substance was first approved for use in ...

A breakthrough in the understanding of how mammals create red blood cells could lead to opportunities for artificial blood to ...