The Science Behind IPL Hair Removal & Skin Rejuvenation | Nood – nood

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The Science Behind Nood IPL Technology

Scroll to read how Nood is redefining at-home light therapy and how the science behind it powers hair free, age defying skin.

how light can transform your skin

IPL, or Intense Pulsed Light, is a broad-spectrum light technology that has been trusted in dermatology for decades. Originally developed as the foundation for professional hair removal, IPL quickly became recognized as the gold standard for reversing visible signs of photoaging - including sun spots, uneven tone, fine lines, and texture.

Blue light

500-600 nm

Primary Target

Epidermal melanin & superficial hemoglobin

What It Helps With

Sun spots, freckles, overall discoloration, surface redness

Red light

600-900 nm

Primary Target

Melanin in hair follicles

What It Helps With

Long-term hair reduction on suitable skin/hair types

NIR

800-1200 nm

Primary Target

Water/dermal heating

→ fibroblast activity

What It Helps With

Collagen stimulation, texture smoothing, firmness support

“Light is one of the most powerful tools we have to reverse the effects of sun damage, ironically the same source that causes it. IPL allows us to harness that power safely and effectively to heal, rejuvenate, and

renew the skin.”

Dr. Dan Friedman, MD

BOARD CERTIFIED DERMATOLOGIST,

MEMBER OF NOOD SCIENTIFIC ADVISORY BOARD

RED LIGHT

IPL

LASER

the power of the clinic, designed for home.

IPL VS. LASER & RED LIGHT

In-clinic lasers use a single, concentrated wavelength of high energy to destroy pigment or hair follicles in one powerful pulse. The results are fast but can be painful, expensive, and often require downtime.

At-home red light devices use much lower energy and a narrow wavelength range (typically 600–850 nm) to gently stimulate cellular activity. They can improve surface glow and inflammation but aren’t strong enough to target hair follicles or remodel collagen at a deeper level.

Nood’s IPL devices sit in between — using broad-spectrum light energy to safely deliver professional-level results at home. Each flash emits a lower energy density than a laser but builds the same total energy over multiple sessions, achieving clinical-grade results without the pain or recovery time.

safety and skin science

ENGINEERED FOR ALL SKIN TYPES, BACKED BY DERMATOLOGISTS.

Nood's devices include integrated UV filters to ensure safe, consistent light delivery across a broad range of skin tones. Each device undergoes rigorous testing and is FDA-cleared for at-home use, combining proven technology with uncompromising safety.

developed by experts in dermatology and photomedicine

Our advisory board ensures that Nood's technology meets the highest clinical standards for safety, efficacy, and long-term results.

Dr. Valerie Hanft, MD

Board certified dermatologist with two decades of experience studying how light, inflammation, and barrier health affect aging. She leads Nood’s product testing to ensure safe, effective

skincare results.

Dr. Daniel Friedmann, MD

Board certified cosmetic dermatologist and Clinical Research Director with expertise in laser science and skin therapies. His research on light and collagen supports Nood’s dermatologist

led innovation.

Mike Murphy

Physicist and bioengineer recognized as a pioneer in aesthetic laser technology. With decades of experience in Q switched and IPL systems, he advances Nood’s safe, effective skincare solutions.

Dr. Valerie Hanft, MD

skincare results.

Dr. Daniel Friedmann, MD

led innovation.