RevianRed Hair Growth System
119-LED app-run cap at 620 and 660 nm, cleared by name under 510(k) K173729; output never tested.
$1,995
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Usability
Usability
The Revian Red is an LED cap rather than a laser cap: 119 LEDs at 620 and 660 nm and no laser diodes, with an output Revian gives as 1.67 mW/cm2, or 1.0 J/cm2 over its 10-minute session, a figure no independent tester has checked. Its clearance is direct, since 510(k) K173729, filed in 2018 under Revian's former name, PhotonMD, names the REVIAN RED. Every session is started and logged through the Revian app, and app-store reviewers name that dependence, slow pairing and a battery lasting one to three sessions as their main complaints. Reddit owners split, with three of nine reporting less shedding, two of them also using minoxidil, and four reporting no visible change after a year or more of daily use. The warranty is 3 years, and the money-back guarantee pays in full only to a buyer who logs at least 80 percent of sessions over 180 days and asks in the seventh month. It is $1,995 on revian.com and $1,595 at Bosley, and Amazon US no longer lists it.
- 510(k) K173729 names the REVIAN RED
- 119 LEDs at 620 and 660 nm across the scalp
- Cordless, hands-free 10-minute daily sessions
- 3-year warranty
- Full refund at six months for a buyer with 80 percent logged use
- Every session needs the Revian app on a phone or tablet
- No independent output measurement; Revian states 1.67 mW/cm2
- LED-only, with no laser diodes
- Battery lasting one to three sessions, per three app reviewers
- An opened device cannot be returned outside the guarantee
The Revian Red is a cordless soft cap lined with 119 LEDs at 620 nm and 660 nm, worn for one 10-minute session a day and started and logged through the Revian app on a phone or tablet. The cap weighs 0.34 lb, fits head circumferences of 21.26 to 25.20 inches, runs on a lithium-ion battery and comes with a charger, a travel bag, a headliner adjustment kit and a support base. Revian covers it for 3 years and refunds it in full in the seventh month to a buyer who logged at least 80 percent of daily sessions over the first 180 days.
Additional information
Specification: Revian Red Hair Growth System
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Questions answered from our data

How much does a laser cap for hair growth cost?The 40 laser hair growth devices we list run from $225 to $3,699, with a median of $997.
Is red light therapy FDA approved?56 of the 181 red light therapy devices we list are named in an FDA 510(k) clearance.
How long is a laser cap session?Of the 40 laser hair growth devices we list, 40 state a session length; the most common is 5-10 min (26).
Do laser caps for hair growth use near-infrared?Seven of the 40 laser hair growth devices we list publish a near-infrared wavelength (800 nm or longer).

