How Does Blue Light Therapy Work?
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Time to read 2 min
LED-SCIENCE [07-21-2025]
by Madison Carter
How Does Blue Light Therapy Work?
Blue light therapy is gaining popularity in skincare—and for good reason. This non-invasive treatment helps address breakouts, inflammation, and even oil control.
Curious how it all works? Let’s dive in.
Table of contents
How Does Blue Light Therapy Work? What Is Blue Light Therapy? How Does Blue Light Therapy Work? Key actions of blue light: What Does the Science Say? What Skin Concerns Can It Help With? How to Incorporate Blue Light Into Your Routine What to Expect After Regular Use Within 1-2 weeks: Within 4-6 weeks: Is Blue Light Therapy Safe? Can I Combine Blue and Red Light? FAQ: Acne Serums vs. Blue Light Therapy
What Is Blue Light Therapy?
Blue light therapy is a type of LED light treatment that uses specific wavelengths to target acne-causing bacteria.
It typically operates at wavelengths between 405 and 420 nanometers , which makes it ideal for penetrating just beneath the skin’s surface.
Unlike UV rays, blue light is non-damaging and completely safe for regular skincare use.
How Does Blue Light Therapy Work?
So, how does blue light therapy work? It penetrates the upper layers of the skin to eliminate acne-causing bacteria (specifically, Propionibacterium acnes).
This bacteria thrives in clogged pores and leads to inflammation, whiteheads, and painful cysts. By neutralizing the source of acne, blue light reduces future breakouts and promotes clearer skin.
Key actions of blue light:
Kills acne-causing bacteria
Reduces inflammation and redness
Helps regulate oil production
Minimizes active breakouts
What Does the Science Say?
Studies show that consistent blue light therapy can significantly reduce acne lesions after several weeks of use. A 2021 dermatology review noted visible results after just four weeks of use, twice a week. It’s also clinically backed for being non-invasive, pain-free, and safe for all skin types .
"Blue light therapy is an effective, non-drug treatment option for acne."
What Skin Concerns Can It Help With?
Blue light therapy is most effective for:
Mild to moderate acne
Oily skin and sebaceous gland activity
Reducing inflammation and redness
Preventing future breakouts
While it’s not a treatment for hormonal acne or cystic acne alone, it works best when combined with topical products or red light therapy.
How to Incorporate Blue Light Into Your Routine
Consistency is key. Most people see results by using blue light therapy 3-5x a week for about 10-20 minutes per session. You can layer it into your routine either before or after cleansing , depending on your skincare goals.
Glotech™ Lite offers blue light therapy in a lightweight, comfortable format—ideal for travel or daily home use.
What to Expect After Regular Use
Within 1-2 weeks:
Less oily skin
Fewer new pimples
Calmer, less inflamed skin
Within 4-6 weeks:
Smoother texture
Noticeably fewer breakouts
More even-toned skin
The Glotech™ Lite offers blue light therapy in a lightweight, comfortable format—ideal for travel or daily home use.
Is Blue Light Therapy Safe?
Yes— blue light therapy is FDA-cleared and has no downtime or recovery. It’s safe for daily use and doesn’t make the skin sun-sensitive.
Can I Combine Blue and Red Light?
Absolutely. In fact, we recommend it.
Red light therapy penetrates deeper into the dermis and stimulates collagen while blue light targets the surface bacteria. Together, they form a powerful anti-acne and anti-aging duo.
Glotech Pro and Glotech Lite allow for seamless switching between blue and red light , letting you target multiple concerns in one sessi