Full-face LED masks like this one can cost up to several thousand U.S. dollars. The application of red light can stimulate collagen production and blood circulation, and even reduce signs of aging.

“At-home LED devices, particularly those that combine red and blue light, are efficacious for acne and can likely complement other over-the-counter and prescription treatments,” they wrote.

In a new study published Wednesday, researchers conducted six clinical trials on 216 participants with mild to moderate acne ...

There are all kinds of expensive beauty treatments on the market — various creams, zappy lasers, and fine mists of heavily-refined chemicals. For [Ruth Amos], a $78,000 LED bed had caught her… ...