What Are the Benefits of LED Light Therapy? What's the most effective wavelength?

The benefits of LED light were discovered by NASA and had been applied to promote cell growth for over thirty years to assist with growing plants in space. After seeing the beneficial effects that LED light therapy had on cell health and rejuvenation, it was used in the medical industry and then was later incorporated in the the skincare industry to help stimulate collagen growth. It was also discovered that all the various colors on the visible spectrum had different benefits - while red lights were the ones originally used for stimulating cell growth, it was also discovered that blue lights, for instance, had a germicidal effect and could be used to kill the p.acnes and staphylococcus bacteria that are present with acne. Green lights, similarly, target melanocytes and help to break apart excess pigment on the skin, clearing hyper-pigmented spots.

For healthy and lasting effects, it has been found that administering low level lights over a long period of time is the most effective way to approach LED light therapy. It takes several sessions of LED light therapy for the skin and cells to respond. The range of wavelengths typically used are 600 nm to about 1300 nm. Although these wavelengths emit more than just red light, UV rays are not emitted so there’s not enough concentrated light to cause damage to skin or tissue health. Having the LED therapy emit wavelengths of 600nm-1300nm promotes the healing of wounds on the skin as well as skin rejuvenation.

Even with at-home LED light therapy devices, the most effective way to achieve noticeable and long lasting results is by having the treatment done with professional LED light therapy devices.

From person to person, the number of treatments needed and the time it takes to see results varies. Yet among the differences between age, targeted skin diagnosis, and how quickly the results show, one thing stays in common: the best, healthiest results come from low light treatments over several sessions.







Sources:

https://www.huffingtonpost.com.au/2016/05/12/exactly-what-led-light-therapy-is-and-why-its-good-for-your-ski_a_21376338/

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3926176/

https://www.healthline.com/health/red-light-therapy

http://www.berkeleywellness.com/self-care/preventive-care/article/red-light-therapy-skin


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How Much SPF Do I Really Need?

Many people think that having a higher SPF sunscreen means more coverage, such as a sunscreen with an SPF of 50 providing significantly more coverage than an SPF of 30. These claims aren’t true though, since sunscreen protection increases only slightly for any SPF above a value of 15.


Here’s how sunscreen coverage is calculated:


100 - [1/(x value of SPF given)] x 100=% coverage *


This means that:


SPF 5=100-[1/5]*100= 80% coverage

SPF 15=100-[1/15]*100= 93% coverage

SPF 30=100-[1/30]*100= 97% coverage

SPF 50=100-[1/50]*100=98% coverage


As you can see, the difference between SPF 15 and SPF 30 is only 4%. The difference between SPF 30 and SPF 50 is an even smaller 1%. Though it’s often thought that SPF values increase linearly, the percent coverage after an SPF of 15 doesn’t make the difference in coverage that is often advertised.

The minimal difference between percent coverage of a sunscreen having an SPF of 15 vs. an SPF of 30 or 50 shows that an SPF of 15 is an effective option compared to sunscreens with higher SPF. The protection that SPF 15 sunscreen provides against UVB rays is comparable to the protection that sunscreens with SPF 50 provide.

Sunscreens that have higher SPF values tend to have more chemicals than sunscreen with a lower SPF value, showing that sunscreen with a value of SPF 15 offers a similar level of protection without the same amount of chemicals.

With a difference in sun protection as SPF numbers increase being so small, it seems that higher SPF sunscreen isn’t much better at protecting your skin than a lower SPF of 15. Just because a sunscreen may have a higher SPF, doesn’t necessarily mean that sunscreen will provide much greater coverage than a sunscreen with a lower SPF of 15.

At NŪR, we recommend using a sunscreen with an SPF of 15, with the knowledge that any higher SPF won’t provide much more coverage.





*Kaplan. “Dear Science: What Does Sunscreen SPF Mean, and What Happens If You Mix Them?” The Washington Post, WP Company, 20 June 2016, www.washingtonpost.com/news/speaking-of-science/wp/2016/06/20/dear-science-what-does-sunscreen-spf-mean-and-what-happens-if-you-mix-them/?utm_term=.2f9726e79fd4.


What is holistic skincare?

These days it seems the term ‘holistic’ is surfacing everywhere, and when we see it in the context of skin care, it is sometimes used interchangeably with “organic,”  “all-natural, or “spiritual.” I’ve even heard of holistic skin products being...

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