All about Darkenyl in RevivHair REV Advanced
All about the remarkable compound Darkenyl in remarkable RevivHair REV Advanced with Grey Hair Reverse (product page here):
Darkenyl™ reduces white hair in 4 months (clinical test)
The efficacy of Darkenyl™ at 1% was evaluated in a double blind test versus placebo. Forty four Caucasian male volunteers (18 year old and more) with white hair were involved in the clinical evaluation. The panel was split into two groups of twenty two volunteers. One group was testing the placebo product the second group was testing the hair lotion containing 1% of DarkenylTM. The treatment was applied in leave-on by massage on the scalp, once a day for four months.
1. Reduction of the white hair proportion
Pictures of the scalp were taken using a NIKON D7100 M0 M4 in combination with the Canfield Epiflash® system, on the first day of the test and after four months of daily application of the product.
The hair parting area was defined according to the white hair localisation. A blind scoring was performed to evaluate the proportion of white hair in the picture versus total number of hairs.
Results: After four months of treatment, Darkenyl™ significantly decreases the proportion of white hair by an average of
-17% versus D0 (from 59% of white hair at D0 down to 49%), more than 2 times more efficiently than the placebo.
The proportion of white hair is visibly reduced, with a reduction down to -56% for the best respondent (from 90% of white
No white roots effect was observed during hair growth.
2. Reduction of the white hair density per cm2
To evaluate the efficacy of Darkenyl™ independently from the sclap density, an absolute quantification of the white hair number was also performed.
At the beginning of the test, an area of 1 cm2 was shaved on every panellists. Two days after shaving, a picture was taken of the area using a NIKON D7100 in combination with the Canfield Epiflash® system. The density of white hair (number/cm2) was evaluated with a specific Photoshop® tool, on a 0.7 cm2 test area (1 x 0.7 cm) defined on the image. All white hair whose root was in the analysis zone were counted.
Results: After four months of treatment, Darkenyl™ significantly decreases the number of white hair per cm2 by -6.8, more than 3 times more efficiently than the placebo. The density of white hair is visibly reduced, with -55.7 white hair per cm2 for the best respondent after four months, equivalent to a reduction of -33,420 white hair (the average scalp surface being 600cm2).
