Even lean folks can develop a double chin, medically referred to as submental fullness. Factors such as genetics, poor posture, and aging change the shape of your double chin.
In recent years, Red light therapy (RLT) has become a popular non-invasive alternative that may improve the appearance of this area. But how well does RLT actually work? What results can you expect?
We are going to explain it clearly, realistically, and practically.
Can Red Light Reach the Area That Matters Under the Chin
Red light therapy operates by exposing tissues beneath the skin to specific wavelengths of light, usually within the 630–660 nm (red) and 810–880 nm (near-infrared). These wavelengths have the ability to penetrate deeper layers and are essential for important cellular processes.[1]
Two primary targets exist under the chin:
- The skin layer, which can be loose or saggy over time
- The fat layer contributing to chin fullness
Tissue penetration of red and near-infrared light happens several millimeters deep. This is enough to reach:
- Collagen-producing fibroblasts
- Mitochondria (the parts that generate cellular energy)
However, we need to know that:
Unlike surgical or clinical treatments that physically melt away fat or break it up, red light itself does not directly cut fat. Instead, it facilitates cellular activity that can enhance the appearance of the jawline indirectly.
Does Red Light Therapy Work Better for Skin Tightness or Fat Reduction
Many people get confused here. Yes, red light therapy does offer great benefits — but it also has several misconceptions.
Of course, red light therapy works for fat loss, but it is far more effective for skin-tightening than for reducing fat. [2] When used with consistency, RLT;
- Stimulate collagen production
- Improve elasticity
- Produce smoother, firmer skin
In the skin, red and near-infrared light penetrate to a depth of a few millimeters. This is sufficient to interact with:
- Fibroblast cells (which produce collagen)
- Mitochondria (which provide cellular energy and contribute to repair)
However, its penetration has limits. The light is not deep enough to immediately start breaking down the fat deposits. Instead, it works directly to improve your skin's appearance with time.
Who Is Most Likely to Notice Visible Changes in the Jawline Area
Outcomes can be highly variable depending on the cause of your double chin. The same device used by two people may yield very different results.
You are more likely to see improvement if your worry is:
- Mild skin laxity
- Signs of aging under the chin
- Slight chin softness rather than heavy fat deposition
You will see less drastic change if:
- There is a large sub-chin fat pad
- The skin is already very loose
- You expect dramatic contouring
Aging also plays a significant role in the results of therapy. Those in their late 20s to 40s tend to respond more easily since the skin still has a fair capacity to remodel collagen. Consistency matters more than intensity. Using a moderate device on a regular basis often produces better results than using a stronger device infrequently.
How Long Does It Usually Take to See Improvement
Red light therapy works gradually. Instead of prompting immediate change, it provides natural assistance for biological repair processes.
The most common way people start noticing the changes in stages is: [3][4]
- For the first few weeks, your skin may appear relatively more hydrated or rejuvenated
- Mild firmness can appear within a month
- Around 8 to 12 weeks, you will start to notice subtle tightening
Depending on your usage, this timeline may vary. A typical routine involves several sessions per week, and each session should be approximately 10–20 minutes long. The results will be delayed if you skip any session or apply it inconsistently.
This slow timeline is normal. Collagen synthesis and skin remodeling are not an overnight process. They must be triggered several times over an extended period. That is why try not to skip any sessions.
What to Combine With Red Light Therapy for Better Double Chin Results
The science shows that red light therapy is much more effective when it is combined with other therapies, rather than used alone. As a double chin may be caused by several factors, usually employing more than one approach yields the best results.
Posture correction: Maintaining the correct posture by keeping the head aligned with the spine reduces stress on the neck and helps to prevent the jawline from sagging.
Simple neck and jaw exercises: Gentle neck exercises engaging the muscles of the neck aid in chin toning.
Lymphatic drainage or massage: This can help to decrease fluid buildup under the chin, reduce swelling, and give a sculpted appearance to the skin.
Supportive skincare: Red light therapy stimulates collagen-rich skin, and using ingredients such as retinol or peptides can help maximize the tightening results.
Maintain a healthy weight: If weight gain leads to a double chin, overall weight management gives better results along with RLT.
Stay consistent with treatment: You need to add regular red light therapy to your skincare routine for long-lasting improvement.
Set Realistic Expectations Before You Start Treatment
Before getting started, it is so important to understand what red light therapy can and cannot do. This non-invasive and safe option can improve the quality, including some mild tightening of the skin, over time.
Red light therapy is:
- Non-invasive
- Safe when used properly
- Helpful for improving skin quality
Not a tool to reshape the chin dramatically. You can get a slightly firmer skin, smoother texture, and a more refined, subtle jawline
You should not expect:
- Rapid fat loss under the chin
- Sharp contouring, like surgical procedures
- Immediate or dramatic transformation
Final Thoughts: Does Red Light Therapy Work?
Red light therapy can help to reduce the double chin by improving skin firmness, elasticity, and indirectly targeting fat. It can be a good option if you're dealing with mild sagging or early signs of skin aging.
The trick to achieving a desired chin shape is to give the RLT device time and combine it with some small lifestyle changes. In the long run, those tiny enhancements will result in a sharper jawline without undergoing invasive procedures.
References
[1] Avci P, Nyame TT, Gupta GK, Sadasivam M, Hamblin MR. Low-level laser therapy for fat layer reduction: a comprehensive review. Lasers Surg Med. 2013;45(6):349-357. doi:10.1002/lsm.22153
[2] Cleveland Clinic. “Red Light Therapy: Benefits, Side Effects & Uses.” Cleveland Clinic, 1 Dec. 2021.
[3] Shah GM, Greenberg JN, Tanzi EL, Monheit GD. Noninvasive approach to treatment of submental fullness. Semin Cutan Med Surg. 2017;36(4):164-169. doi:10.12788/j.sder.2017.040
[4] Hernández-Bule ML, Naharro-Rodríguez J, Bacci S, Fernández-Guarino M. Unlocking the Power of Light on the Skin: A Comprehensive Review on Photobiomodulation. Int J Mol Sci. 2024;25(8):4483. Published 2024 Apr 19. doi:10.3390/ijms25084483
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