does more laser mean better
By Tamim Hamid Posted on 05/07/2024

Does More Laser Mean the Better Result?

Are you enticed by the promise of hair growth devices adorned with a multitude of lasers? It's easy to assume that more lasers equate to superior outcomes, but let's delve deeper into the science behind this idea.

A device boasting 300 lasers might sound four times better than one with eighty. However, the reality is far more nuanced: an abundance of lasers often correlates with heightened heat generation. When it comes to laser therapy for hair growth, excessive heat can reduce the optical efficiency of a laser, rendering it nearly useless. For example, a regular household 100-watt lightbulb will be reduced to 5 watts if there’s too much heat generated.

One critical issue plaguing laser/LED-packed devices (i.e. more than 80 lasers) is the absence of adequate ventilation. Without sufficient airflow, lasers subjected to elevated temperatures fail to function optimally, rendering them ineffective in addressing hair loss concerns. Instead of facilitating hair regrowth, these overheated lasers may exacerbate the issue and actually cause telogen effluvium, a condition where heat can be the primary contributor to massive hair loss (i.e. over 150-300 hairs lost per day).

Consider the fundamental principle: lasers emit heat, just like any electronic device like your mobile phone, for example. Thus, employing a laser phototherapy device teeming with excessive lasers introduces additional warmth to the scalp. Given that the scalp already maintains a relatively high temperature (98.6° F or 37° C) compared to other bodily regions, this surplus heat can trigger inflammatory responses and potentially increase hair loss conditions.

As you likely learned in school as a child, adding heat to any compound will change the state of that compound. This is not the outcome you want with your hair. At its core, the issue boils down to the adverse effects of thermal energy on the scalp. Excessive heat generated by lasers can disrupt the delicate balance of the scalp environment, adversely affecting hair follicles and hindering their ability to proliferate and regenerate. Prolonged exposure to elevated temperatures may even lead to follicular damage, further compounding hair loss concerns. Thermal energy disrupts the intricate biochemical processes within the hair follicles, hindering their ability to proliferate and regenerate. Consequently, instead of fostering hair growth, overheated lasers may inadvertently impede the natural hair regeneration cycle.

What Should One Look for in a Hair Growth Device?

So, what qualities should one seek in a hair growth device? Rather than fixating solely on laser quantity, think about laser dosage and heat distribution. After all, it's the precise calibration of these factors that determines how well your laser therapy device will work to grow your hair. The key lies in striking a delicate balance between laser dosage and heat management. And let’s not forget the most critical quality is the laser wavelength. It has been proven that 680nm wavelength is the ideal wavelength to promote hair growth, thicken the diameter of each hair and stop hair loss. Opting for a device that delivers maximum therapeutic benefits with minimal heat output is paramount. Such devices, like the NASA-scientist-designed Theradome, are meticulously engineered to harness the therapeutic potential of laser therapy while mitigating the risk of thermal damage to the scalp.

While an abundance of lasers may appear enticing, the inherent risks associated with excessive heat must not be overlooked. Rather than just being impressed by big numbers, prioritize devices that offer optimal therapeutic benefits without compromising your scalp’s health.

Ultimately, the pursuit of effective hair growth solutions hinges on a deep understanding of the intricate interplay between laser technology and scalp physiology. It’s best to choose a device designed by a true expert who understands, or perhaps has even written a book, about the whole field.


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Tamim Hamid

Tamim Hamid

Inventor and CEO of Theradome

Sayyid Tamim Hamid, Ph.D, is the inventor of the world’s first FDA-cleared, wearable phototherapy device to prevent hair loss and thicken and regrow hair. Tamim, a former biomedical engineer at NASA and the inventor of Theradome, brings with him more than 38 years of expertise in product development, laser technology, and biomedical science. Tamim used his laser knowledge, fine-tuned at NASA, and combined it with his driving passion for helping others pursue a lifelong mission in hair loss and restoration. He is now one of the world’s leading experts.