Clinical Efficacy of a Cosmetic Treatment by Crescina® Human Follicle Stem Cell on Healthy Males with Androgenetic Alopecia
Androgenetic alopecia (AGA) is the most common cause of hair loss among males, characterized by progressive thinning of the scalp hairs and defined by various patterns. The main factors underling hair loss in AGA are genetic predisposition and increased sensitivity of the hair follicles to androgens, leading to a shortening of the anagen phase. In the present study, the authors investigated the efficacy of a commercially available cosmetic lotion, Crescina® HFSC (human follicle stem cell; Labo Cosprophar AG, Basel, Switzerland), in promoting hair growth and in decreasing hair loss.
A placebo-controlled, randomized trial was carried out on healthy males suffering from alopecia grade II to IV. Anagen rate and hair resistance to traction (pull test) were assessed after 2 and 4 months of treatment using phototricogram and pull test technique.
Crescina® HFSC applied for 4 months was effective in promoting hair growth and in decreasing hair loss. After 2 and 4 months of treatment, the anagen rate was increased by 6.8% and 10.7%, respectively. Hair resistance to traction was decreased by 29.6% and 46.8%, respectively.
The present study demonstrated the positive effect of Crescina® HFSC in modulating the activity of the hair follicle and promoting hair growth.
KeywordsAnagen rate Androgenetic alopecia Cosmetics Crescina® HFSC Hair growth Hair loss Pull test Topical application
Androgenetic alopecia (AGA) is the most common cause of hair loss among males . It is characterized by progressive thinning of the scalp hairs, defined by various patterns , which can start at any age after puberty and is potentially reversible. Even if from a medical point of view, AGA is considered a relatively mild condition; however, people suffering from this condition consider AGA a serious condition that impacts their self-esteem, well-being, social relationships, and confidence.
The main factors underling hair loss in AGA are genetic predisposition and increased sensitivity of the hair follicles to androgens . AGA is often precipitated and exacerbated by conditions that can induce telogen effluvium, including drugs, acute stressors, and weight loss . However, in recent years it has been shown that other factors, such as microinflammation , decreased microcirculation , and aging , can cause hair loss in AGA. These changes contribute to shifting the normal balance of the hair cycle leading to a shortening of the anagen phase. The major components of balding in AGA are frontotemporal recession and loss of hair over the vertex. Hairs become shorter and finer, and finally complete hair loss occurs except at the lateral and posterior margins of scalp, where hair is retained.
Histologically, in AGA large terminal follicles diminish in size during hair cycles, and the resulting miniaturized follicle eventually produces a microscopic hair. Testosterone is necessary for miniaturization, and 5-alpha-reductase inhibitors, which block the conversion of testosterone to its more active form dihydrotestosterone (DHT), delay the progression of AGA . Recently, Garza and coworkers  reported the preservation of stem cell population and a decreased conversion of hair follicle stem cells to progenitor cells in bald scalp biopsies from AGA individuals. This finding is consistent with the current clinical concept that AGA is a nonscarring type of alopecia and suggests potential reversibility of the condition.
Currently, only two medications, based on finasteride and minoxidil as active pharmacological ingredients, are approved by the US Food and Drug Administration (FDA) for AGA treatment. However, they are costly, require lifelong treatment, and may have side effects. Furthermore, people are frequently reluctant/intimidated by the pharmacological approach to treat a disease that is not life threatening. Thus, a topical, nonpharmacological, effective cosmetic treatment could be more acceptable to patients.
The aim of the present study was to assess the efficacy of the use of a patented (US 6,479,059 B2 and CH 703 390), topical cosmetic product, Crescina® HFSC (human follicle stem cell; Labo Cosprophar AG, Basel, Switzerland), claimed to be effective for the treatment of male AGA . The active ingredients contained in the product were chosen to obtain three main effects: proliferation of the stem cells of both the bulge and the dermal papilla, keratinization, and stimulation of microcirculation. Stem cell and dermal papilla stem cell proliferation was achieved by hydrolyzed rice protein and corosolic acid, respectively. Keratinization was stimulated by cysteine, lysine, and a glycoprotein (lectin). Microcirculation was stimulated by benzyl nicotinate. The mentioned results were obtained from studies commissioned by the company Labo Cosprophar AG, which has filed a patent (CH 703 390 B1) .
Materials and Methods
All the study procedures were carried out according to World Medical Association’s (WMA) Helsinki Declaration and its amendments (Ethical Principles for Medical Research Involving Human Subjects, adopted by the 18th WMA General Assembly Helsinki, Finland, June 1964 and amendments). To participate in the study, each participant was fully informed on study risks and benefits, aims, and procedures. An informed consent form and a consent release for publication of photos were signed by the subject prior to participating in the study.
Subjects and Study Design
Inclusion and exclusion criteria
Healthy male subjects
Age between 20–55 years old
Type: Caucasian race
Subjects showing clinical signs of androgenetic alopecia type II–IV
Subjects who have not used antihair loss treatments the 6 months before the study start
Promise to not use topical and/or systemic products with similar effect to that one of the product to be tested throughout the study period
Promise to not change the daily routine
Subjects who do not fit the inclusion criteria
Subjects with allergies or sensitivity to cosmetic products, toiletries, sunscreens and/or topical drugs
Disorder of the scalp
Subjects with dermatological problems on the test area
Subjects under pharmacological treatment (both locally or systemically)
Positive anamnesis for atopy
Ingredient INCI listings of formulations investigated
Formulation A: test active ingredients
Formulation B: placebo control
Alcohol denat., aqua, glycerin, butylene glycol, lysine hydrochloride, benzyl nicotinate, acetyl cysteine, benzophenone-4, disodium EDTA, glycyrrhetinic acid, menthol, sodium hydroxide, silanediol salicylate, triethanolamine, serine, threonine, propylene glycol, adenosine, allantoin, zinc acetylmethionate, hematite extract, hydrolyzed rice protein, phosphatidylcholine, hydrolyzed soy protein, hydrolyzed DNA, hydrolyzed MA, Eriobotrya japonica leaf extract, salicylic acid, glycogen, glycoproteins, Artemia extract, C.I. 14720, C.I. 16255, C.I. 19140, C.I. 28440, C.I. 73015
Alcohol denat., aqua, disodium EDTA, sodium hydroxide, C.I. 14720, C.I. 16255, C.I. 19140, C.I. 28440
A transitional area of hair loss between normal hair and the balding area of 1.8 cm2 was defined using a stencil template and chosen for clipping. The clipped hairs within the target area were dyed for gray or fair hairs with a commercially available solution (RefectoCil®, GW Cosmetics GmbH, Leopoldsdorf, Germany) in order to enhance their contrast. Thereafter, the dyed hairs were cleansed using an alcoholic solution and digital images were taken while the area was still wet with a digital close-up camera. Images were taken at day 0, immediately after clipping, and 2 days after clipping. These two photographs were then examined by a software system that is able to recognize individual hair fibers in the photographs. By comparing the two photographs, the computer can determine which hairs are growing (anagen hairs) and which are not (telogen hairs). The same procedure was carried out after 2 and 4 months of treatment.
Gentle traction was exerted on a cluster of hairs (approximately 60 hairs) on at least three different areas of the scalp, and the number of extracted hairs was counted. Normally, less than three telogen-phase hairs should come out with each pull . If at least three hairs were obtained with each pull or if more than ten hairs total were obtained, the pull test was considered positive and suggestive of telogen effluvium.
Global Photographic Assessment
Patients were asked to maintain the same hair style, color, and length throughout the study. Standardized global photographs of the frontal/parietal region were taken using a digital camera equipped with a macro lens.
An intention to treat statistical analysis was performed using NCSS 8 (version 8.0.4 for Windows; NCCS, LLC., Kaysville, UT, USA). Data were checked for normality using either the Shapiro–Wilk W, Kolmogorov–Smirnov, and D’Agostino omnibus normality tests. If the data were normal, the repeated measure analysis of variance (RM-ANOVA) followed by Tukey–Kramer multiple comparison test was performed both for intra- and inter-group comparisons. If data were not normal, the Wilcoxon signed-rank test was performed for intra-group comparisons, whereas the Mann–Whitney U test was performed for inter-group comparisons. Values are expressed as arithmetic mean ± standard deviation (SD). P < 0.05 was considered significant.
Baseline characteristics of the randomized subjects
Crescina® HFSC (n = 23)
Placebo (n = 23)
Mean age ± SD, years
34.7 ± 11.2
Mean baseline anagen ratio ± SD
63.8 ± 4.2%
62.8 ± 4.3%
Hamilton–Norwood score, no. (%) of individuals
Type III vertex
Results of anagen hair count (%)
T = 0 months
63.8 ± 4.2
62.8 ± 4.3
T = 2 months
70.6 ± 6.9
63.7 ± 5.0
T = 4 months
74.5 ± 5.6
65.0 ± 5.2
Results of pull testing
T = 0 months
9.2 ± 1.3
9.1 ± 1.8
T = 2 months
6.4 ± 1.8
8.3 ± 2.1
T = 4 months
4.8 ± 1.5
7.6 ± 1.9
Global Photographic Assessment
Androgenetic alopecia is the most common cause of hair loss among males and has a psychosociologic impact on the well-being of the subject . The pharmacologic treatment of AGA is expensive, requires lifelong treatment, and may have side effects. Subjects are also reluctant/intimidated to use drugs for a nonpathologic condition; however, use of cosmetics is more acceptable.
A large number of cosmetics claiming to be effective in the coadjuvant treatment of AGA are sold on the market, but some lack proof of effect, relying only on the effects of the raw materials. Contrary to this approach, new cosmetic regulations  require manufactures to demonstrate product efficacy in order to protect subjects from misleading claims.
The present study aimed to assess the efficacy of the topical application of cysteine, lysine, a glycoprotein, hydrolyzed rice protein, and corosolic acid (the active ingredients that are contained in the formulation of Crescina® HFSC) in promoting hair growth and in decreasing hair loss . It would be desirable to analyze a larger population sample; however, this would require longer-term studies (approximately 1 year), which are not always compatible with the needs of the economic commitment of research and the cosmetic market, which is rapidly and constantly developing. Moreover, the compliance of large groups of subjects who undergo the test decreases with time spent in the clinical trials. On this basis, as the present study has already shown efficacy in the short term (4 months), it was considered significant and important to highlight this positive result. The authors can further expand these data by considering a greater sample size and longer-term study.
In conclusion, the present investigation has demonstrated the effects of a mixture of ingredients that is able to promote hair growth and decrease hair loss. The results obtained showed that Crescina® HFSC applied for 4 months in subjects suffering from alopecia grade II to IV was effective in stimulating hair follicle activity as demonstrated by the time-dependent anagen rate increase. Correspondingly, the treatment decreased hair loss and hair resistance to traction, demonstrating its beneficial effect on hair loss.
The authors thank the staff of Farcoderm for their professionalism and support during study development. The performance of the study was sponsored by Labo Cosprophar AG, Basel, Switzerland. The sponsor had no influence in the performance, analysis, and interpretation of the study. Dr. Marzatico is the guarantor for this article, and takes responsibility for the integrity of the work as a whole.
Conflict of interest
Dr. Buonocore declares no conflict of interest. Dr. Nobile declares no conflict of interest. Dr. Michelotti declares no conflict of interest. Dr. Marzatico declares no conflict of interest.
This article is distributed under the terms of the Creative Commons Attribution Noncommercial License which permits any noncommercial use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited.
- 3.Blume-Peytavi U. Anlagebedingter Haarausfall und aktuelle Therapiekonzepte. Akt Dermatol. 2002;28(Suppl. 1):19–23 (in German).Google Scholar
- 10.Report patent document filed on January 13, 2012 in Zurich (CH) representative Schmauder & Partner AG Patent- und Markenanwalte VSP, Zurich.Google Scholar
- 13.Regulation (EC) no 1223/2009 of the European Parliament and of the Council of 30 November 2009 on cosmetic products. Official Journal of the European Union. 2009; L342/59.Google Scholar