The complete IPL hair removal guide

The effectiveness of Intense Pulsed Light (IPL) has been extensively researched within dermatological science. Numerous clinical studies show that IPL, when applied correctly, can deliver a long-lasting and significant reduction in hair growth.

A 2021 systematic review of home-use devices in dermatology confirmed this: home IPL proved effective and safe, with all randomised trials reporting a reduction in hair density of more than 50% and only mild, temporary side effects occurring (Cohen et al., 2021).

Individual clinical studies also support these findings. A study of 70 women at Maastricht Medical Centre showed an average hair reduction of 87% after around eight treatments, with results lasting more than 27 months (Schroeter et al., 2004).

The effectiveness of the Nova One IPL fits seamlessly with this. In a clinical test by Shenzhen Mlay Intelligent Technology Co., Ltd. (T16 model, 2023), 80% hair reduction was achieved in 20 test subjects within seven weeks, without serious side effects such as swelling or ulceration. The device was clinically validated as safe and effective for home use.

These results are explained by IPL's mechanism of action: the light penetrates to the hair follicle, where the energy is absorbed by melanin and converted into heat. This heat weakens the hair root, slowing new hair growth. Because the surrounding tissue is largely spared, the skin barrier stays intact and irritation is kept to a minimum.

The way IPL works starts with the interaction between light and pigment. Every hair follicle contains melanin, the pigment that determines the colour of your hair. During an IPL treatment this pigment absorbs the emitted light, which is then converted into heat. That heat reaches the hair root and gradually weakens it, slowing hair growth without damaging the skin itself.

This process is called selective photothermolysis: the light specifically targets the dark pigment in the hair, while the surrounding skin is left untouched. That's why IPL works most effectively on skin types I–IV with dark hair. Modern IPL devices, such as Laesera's, are also equipped with automatic skin tone detection. The light intensity is adjusted to your skin every time, making the treatment not only effective but also safe, even for sensitive skin types.

Because IPL uses a broad spectrum of light pulses, several hairs can be treated at once. That makes the system particularly suitable for larger areas such as legs, arms or back.

In short: IPL targets the hair follicle, not the skin. This keeps the skin barrier intact and makes hair removal not only effective but also dermatologically responsible.

Comparative research also shows that IPL has a favourable safety profile compared with other light and laser therapies. A clinical study of 66 women with hirsutism showed that both diode laser and IPL are effective for hair reduction, but that IPL caused fewer side effects and showed better outcomes on fine hairs (Karadaghy et al., 2020).

IPL (Intense Pulsed Light) works with short, powerful light pulses directed at the skin. The light is absorbed by the pigment (melanin) in the hairs and converted into heat. This heat reaches the hair root and disrupts the growth process there, so hair growth gradually reduces or stops.

The Nova One IPL uses this proven technology, combined with modern innovations for maximum safety and comfort. A built-in skin sensor automatically recognises the skin's tone and adjusts the energy level of the light flash accordingly. This prevents too much energy being emitted on skin that's too dark, making the treatment safe for different skin types.

During use, an advanced cooling function actively cools the skin after every light pulse. This reduces the heat sensation and prevents irritation, so the treatment is virtually painless, even at higher energy levels.

The Nova One IPL works with a flash interval of 0.5 to 2 seconds, ensuring a smooth and fast treatment. The generous 3.9 cm² light window covers a large surface per flash, ideal for larger areas such as legs or arms, while precision heads are suitable for smaller areas such as underarms or bikini line.

Thanks to the combination of smart sensor technology, efficient flash speed and active cooling, the Nova One IPL offers a safe, comfortable and durable solution for long-lasting hair reduction at home.

When using IPL technology, safety always comes first. Modern IPL devices, such as Laesera's, are equipped with several sensors and protection mechanisms to guarantee a safe treatment for home use.

An important role is played by the automatic mode with skin sensor function, which automatically recognises the skin's tone and adjusts the energy level accordingly. This prevents too much light energy being emitted on skin that's too dark. IPL devices also have light filters that only let through specific wavelengths (for example 510–1200 nm). This means only the desired light spectrum that's effective against hair follicles is used, while harmful radiation is blocked.

The flash button usually only works when the device makes full contact with the skin, an extra safeguard that prevents unintended light pulses. Together with automatic temperature control and ice cooling, this ensures a safe, skin-friendly experience.

In terms of regulations, quality IPL devices comply with international safety standards such as:

• CE marking: indicates that the device complies with European directives for electrical safety (LVD), electromagnetic compatibility (EMC) and user protection.
• RoHS certification: guarantees that the product is free of harmful substances such as lead or mercury.
• FDA 510(k) clearance: confirms that the device is safe for cosmetic use according to the standards of the US Food and Drug Administration.

Thanks to these safety mechanisms and certifications, IPL devices are suitable for responsible home use, provided they're used according to the manual and the skin is properly cleaned and shaved beforehand.