These are the best at-home red light therapy devices

“Red light — particularly in combination with blue light therapy — has also been shown to help improve acne by reducing inflammation and bacteria on the skin’s surface,” says Dr. Chang. (It’s especially useful as part of a pregnancy-safe skin care routine since those who are pregnant might not be able to use other powerful acne fighters like retinoids or salicylic acid.)

There is an important caveat: Clinical studies for at-home red light therapy devices are limited, says Dr. Chang. “Many of the clinical benefits of red light as well as optimal treatment regimen are yet to be determined,” she says.

Is red light therapy at home effective?

About that caveat. Most evidence for the effectiveness of red light therapy comes from clinical settings and the fact is “at-home red light therapy devices are not as strong as the devices we have in our offices,” says Margarita Lolis, MD, a board-certified dermatologist at Schweiger Dermatology Group in New Jersey.

That doesn’t mean that you won’t see any benefit from using at-home devices, she adds. “At-home devices will take more consistent use as directed by the manufacturer because of the difference in strength,” Dr. Lolis says. “It will take longer to achieve the glow that red light therapy is known for, but if you are patient and follow directions, you can achieve glowing skin on your schedule versus coming in weekly or biweekly for in-office treatments.”

Another way to think about it is the frequency of use over the same period of time, says Dr. Shah. You might see the same results from six in-office treatments over the course of six months that you would in that same time frame if you used an at-home device a few times a week.

There are some variations in the wavelengths of light offered by at-home devices (most emit red and near-infrared light between 600 and 850 nanometers) and the concentration of LEDs (i.e., the intensity with which a device can emit light). The key to getting the strongest red light therapy at home is choosing a method that you’ll be most likely to use consistently. Always follow the manufacturer’s instructions to get the full benefits of the device, Dr. Lolis adds.

How often should you use an at-home red light therapy device?

There’s a lot of variation in the recommended time and frequency of use for at-home devices, so always follow the manufacturer’s directions. “It is recommended to use most devices about three to five times per week for 10 to 20 minutes each,” says Dr. Chang.

This story originally appeared on GLAMOUR US.

Ahead, the very best red light therapy devices on the market to add to your checkout.