Red light therapy has quickly become one of the most talked-about wellness treatments—and unlike many health trends, there’s growing scientific research to support several of its benefits.

Whether you’re looking to reduce inflammation, recover faster after workouts, improve your skin, or ease chronic pain, red light therapy may be a worthwhile addition to your wellness routine.

But does red light therapy actually work? Here’s what the research says.

What Is Red Light Therapy?

Red light therapy (RLT), also known as photobiomodulation (PBM) or low-level light therapy (LLLT), uses specific wavelengths of red and near-infrared light to stimulate your cells.

Unlike ultraviolet (UV) light from the sun, red light therapy does not burn your skin or increase your risk of skin cancer. Instead, these wavelengths penetrate the skin and may improve how your cells produce energy by supporting the mitochondria—the “powerhouses” of the cell.

This increased cellular energy may help the body repair damaged tissue and reduce inflammation.

1. Red Light Therapy May Improve Skin Health

One of the biggest reasons people try red light therapy is for healthier, younger-looking skin.

Research suggests it may help:

• Increase collagen production
• Reduce wrinkles and fine lines
• Improve skin elasticity
• Fade acne scars
• Improve skin texture
• Reduce redness and inflammation

Many dermatologists now recommend red light therapy as part of an overall skincare routine because it’s non-invasive and requires little to no downtime.

2. Helps Reduce Inflammation Naturally

Inflammation plays a role in numerous chronic conditions, including arthritis, tendonitis, autoimmune disorders, and everyday muscle soreness.

Studies suggest red light therapy may:

• Reduce inflammatory markers
• Improve circulation
• Decrease swelling
• Support tissue repair

This is one of the primary reasons athletes and physical therapists use red light therapy for recovery.

3. Speeds Muscle Recovery After Exercise

If you work out regularly, red light therapy may help you recover faster.

Potential benefits include:

• Less post-workout soreness (DOMS)
• Improved muscle performance
• Reduced muscle fatigue
• Faster recovery between workouts

Many professional athletes now incorporate red light therapy into their recovery programs.

4. May Reduce Joint Pain

Research has found promising results for people living with:

• Osteoarthritis
• Chronic knee pain
• Tendon injuries
• Joint stiffness

Regular sessions may help improve mobility while decreasing discomfort.

Although results vary, many users report noticeable improvements after several weeks of consistent treatment.

5. Supports Wound Healing

One of the most studied red light therapy benefits is improved healing.

Research suggests it may help accelerate healing for:

• Surgical incisions
• Minor cuts
• Burns
• Soft tissue injuries

It works by supporting collagen production, improving circulation, and encouraging cellular repair.

6. May Help Stimulate Hair Growth

The FDA has cleared certain low-level light therapy devices to treat hereditary hair loss.

Research suggests red light therapy may:

• Stimulate inactive hair follicles
• Increase hair density
• Improve hair thickness
• Slow hair thinning

Results typically require consistent use over several months.

7. May Improve Recovery From Injuries

Physical therapists often recommend red light therapy to complement rehabilitation.

Potential benefits include:

• Reduced swelling
• Improved blood flow
• Faster tissue repair
• Less discomfort

While it isn’t a cure, it may help support the body’s natural healing process.

8. Could Improve Sleep Quality

Emerging research suggests red light therapy may support healthier sleep by helping regulate the body’s natural circadian rhythm.

Some users report:

• Falling asleep faster
• Better sleep quality
• Feeling more refreshed

More studies are needed, but early findings are encouraging.

9. May Help Manage Some Cancer Treatment Side Effects

One of the most evidence-supported medical uses of photobiomodulation is helping reduce oral mucositis (painful mouth sores) caused by chemotherapy or radiation therapy.

Researchers are also exploring whether it may help support tissue healing and reduce certain treatment-related symptoms.

If you have a current or previous cancer diagnosis, always speak with your oncologist before starting red light therapy—especially over or near areas where cancer was treated.

Is Red Light Therapy Safe?

For most healthy adults, red light therapy is considered safe when used properly.

Possible side effects are uncommon and usually mild:

• Temporary skin redness
• Eye irritation if protective eyewear isn’t used
• Mild skin sensitivity

Talk with your healthcare provider before using red light therapy if you:

• Are pregnant
• Have a photosensitive condition
• Take medications that increase light sensitivity
• Have active cancer or are currently receiving treatment

How Often Should You Use Red Light Therapy?

Most experts recommend:

• 3–5 sessions per week
• 10–20 minutes per treatment area
• 8–12 weeks of consistent use before evaluating results

Like exercise, consistency produces the best outcomes.

Does Red Light Therapy Really Work?

The evidence continues to grow, particularly for:

✅ Skin rejuvenation

✅ Reducing inflammation

✅ Pain relief

✅ Muscle recovery

✅ Wound healing

✅ Certain types of hair loss

However, claims that red light therapy dramatically boosts metabolism, melts fat, or cures chronic diseases are not currently supported by strong scientific evidence.

Frequently Asked Questions

How long does it take for red light therapy to work?

Some people notice improvements within a few weeks, while others may need 8–12 weeks of consistent treatment.

Can you do red light therapy every day?

Many devices are designed for daily use. Follow the manufacturer’s recommendations and avoid excessive treatment times.

Does red light therapy hurt?

No. Red light therapy is painless. Most people describe it as relaxing and mildly warm.

Is red light therapy FDA approved?

Several red light therapy devices have received FDA clearance for specific medical indications, such as pain relief or hair loss. FDA clearance does not mean every marketed claim has been proven.

The growing body of research suggests that red light therapy may improve skin health, reduce inflammation, ease joint pain, accelerate recovery, and support the body’s natural healing processes.

While it’s not a cure-all, it can be a valuable addition to a healthy lifestyle that includes regular exercise, quality sleep, nutritious eating, and appropriate medical care.

As always, consult your healthcare provider before beginning any new therapy, especially if you have an underlying medical condition or a history of cancer.

Have you tried red light therapy? Share your experience in the comments—we’d love to hear what’s worked for you!