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Learning Center

Learning Center

The science behind laser hair therapy, in plain English — so you know what a device can and can't do before you buy one.

5 min readJun 1, 2026

Androgenetic Alopecia Explained: The Hair Loss Lasers Can Treat

Androgenetic alopecia is the genetic pattern hair loss laser devices are cleared for. Learn what causes it, how it looks in men and women, and what helps.

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3 min readJun 1, 2026

FDA-Cleared vs FDA-Approved: What It Means for Hair Devices

Every home laser hair device is FDA-cleared, not approved. Here's the difference, why it matters, and how to check a device's clearance yourself.

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6 min readJun 1, 2026

Laser Hair Growth Glossary: Every Term Explained

From anagen to wavelength: a plain-English glossary of the terms you'll meet when researching laser caps and helmets for hair loss.

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5 min readJun 1, 2026

How Laser Hair Therapy Works: Photobiomodulation Explained

How does red light make hair grow? A plain-English explanation of photobiomodulation, the hair growth cycle and what the light actually does.

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4 min readJun 1, 2026

Lasers vs LEDs for Hair Growth: Does the Light Source Matter?

Some devices use lasers, some LEDs, some both. We explain the real differences in coherence, spread and cost, and what it means for your scalp.

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4 min readJun 1, 2026

Norwood and Ludwig Scales: How Hair Loss Is Staged

The Norwood scale stages male pattern hair loss; the Ludwig scale stages female. Learn the stages and which ones laser devices are cleared for.

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4 min readJun 1, 2026

Laser Wavelengths Explained: 650 nm vs 678 nm for Hair Growth

Hair devices quote 650, 655 or 678 nm. What does wavelength actually change, and is a higher number better? A plain-English guide.

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4 min readJun 1, 2026

What Is Low-Level Laser Therapy (LLLT) for Hair?

Low-level laser therapy uses gentle red light to treat pattern hair loss. Learn what it is, what it isn't, and who it's cleared for.

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