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Ann Dermatol Venereol 2002 May;129(5 Pt 2):787-92

Hormonal interaction and hair growth


Androgenetic alopecia (AGA) is the most common form of hair loss in men and women. This continuous process results in a form of alopecia that follows a definite pattern in those individuals who are genetically predisposed. Although clinically different, the pathogenetic pathways leading to this type of hair loss are thought to be similar in both sexes. A genetic predisposition is a feature of AGA, but the predisposing genes are still unknown. Our understanding, however, of the hormonal effects on hair growth is far more advanced. AGA can be defined as a dihydrotestosterone (DHT)-dependent process with continuous miniaturization of sensitive hair follicles. So far, we do not understand the molecular steps involved in androgen-dependent beard growth versus androgen-dependent hair loss. However, the local androgen metabolism plays a central role in the intrafollicular conversion of weak androgens, such as DHEAS, to more potent androgens such as T or DHT within the hair follicle. The dermal papilla plays a central role by exhibiting an array of important steroidogenic isoenzymes. Provided that the dermal papilla (DP) cell triggers and regulates the growth of hair follicles, this physiological role may be reflected by metabolic differences, which could account for differences in androgen sensitivity as observed in hair follicles from different body sites, and in conditions such as male pattern baldness. The observation of STS, 17beta-HSD, 3beta-HSD, 3alpha-HSD and type 2 5alpha-R-activity within the DP could be a clue to understanding the regulation of androgen action in the human hair follicle by local androgen modification on target cell level. Hence, some of the intrafollicular steroidogenic enzymes would be potential pharmaceutical targets for the treatment of AGA or hirsutism.


Ther Umsch 2002 May;59(5):217-22

Diffuse hair loss in women


The complaint "Doctor, I am losing my hair" represents a particular challenge to the physician, and involves making a specific diagnosis, selecting an appropriate therapy, and expressing empathy for the patient's anxiety. Diffuse hair loss in women was formerly classified as an entity of its own. Since the identification of female pattern hair loss, most cases have been recognized to be due to androgenetic alopecia, often during phases of life characterized by fluctuations of sexual hormone levels or in connection with intake or cessation of hormonal therapy. The most difficult differential diagnosis includes androgenetic alopecia, chronic telogen effluvium, and psychogenic pseudo efflvuium. Androgenetic alopecia is due to androgen-induced, non-synchronized, progressive shortening of the hair growth cycle and gradually leads to thinning of the central scalp area. Idiopathic chronic telogen effluvium typically occurs in women, starting abruptly without a recognizable initiating factor, and involves the entire scalp area with increased shedding of telogen hair. It is believed to be due to synchronization phenomena of the cyclic hair growth. Psychogenic pseudo effluvium affects fashion-oriented, self-conscious women suffering of a discrepancy between the actual state of their hair and idealized expectations. Later the problem of age-related hair thinning oft becomes a surrogate for the more generalized problem of senescence. Rational therapy of androgenetic alopecia aims at blocking the androgen effect on hair follicles with estrogens and antiandrogens or at pharmacologically reversing vellus hair transformation with topical minoxidil. In contrast, women with idiopathic chronic telogen effluvium should be reassured that their problem is rather a state of exaggerated "hair shedding" than of actual "hair loss".


Cancer Epidemiol Biomarkers Prev 2002 Jun;11(6):549-53

Androgenetic alopecia and prostate cancer: findings from an Australian case-control study.


The purpose of this study was to examine the relationship between androgenetic alopecia (AA) and prostate cancer with particular emphasis on early age at diagnosis and higher grade tumors. We conducted an age-stratified, population-based case-control study in Australia of men who were diagnosed before 70 years of age during 1994-1997 with histopathology-confirmed adenocarcinoma of the prostate, excluding well-differentiated tumors. Controls were selected from the electoral rolls, and the frequency was matched on age. After excluding subjects with missing values, the analysis was based on 1446 cases and 1390 controls of whom direct observations were made of their pattern of AA during face-to-face interviews. Our data suggest an association between prostate cancer and vertex baldness; compared with men who had no balding, the adjusted odds ratio (OR) was 1.54 (1.19-2.00). No associations were found between prostate cancer and frontal baldness or when frontal baldness was present concurrently with vertex baldness. The ORs were 0.98 (0.79-1.23) and 1.14 (0.90-1.45), respectively. The highest ORs were for high-grade disease in men 60-69 years of age: 1.80 (1.02-3.16) for frontal baldness; 2.91 (1.59-5.32) for vertex baldness; and 1.95 (1.10-3.45) for frontal and vertex baldness. This association between the pattern of AA and prostate cancer points to shared androgen pathways that are worthy of additional investigation.


J Invest Dermatol 2002 Feb;118(2):335-7

Interleukin-1 receptor antagonist allele 2 and familial alopecia areata.


Alopecia areata affects 1%-2% of the population and is hypothesized to be an autoimmune, organ specific T-cell mediated reaction directed against the human hair follicle. It is characterized by loss of hair in patches (alopecia areata) with progression in some individuals to total loss of scalp hair (alopecia totalis) or to loss of all scalp and body hair (alopecia universalis). The interleukin-1 receptor antagonist (IL-1RN) gene was found to be associated with more severe clinical outcome in several chronic inflammatory diseases, including alopecia areata. The IL-1RN*2 allele was found to be associated with alopecia areata severity in a British case-control study. In this paper, we analyzed alopecia areata probands in a family-based sample (n = 131 parent-offspring trios) to study the association between alleles of the IL-1RN and various phenotypes of alopecia areata. In considering all patients with any form of alopecia areata, no association was found with IL-1RN. IL-1RN*2 allele was not associated with alopecia totalis and alopecia universalis. A borderline association was observed between IL-1RN and patchy alopecia areata but it was not statistically significant (p =0.06). We also observed an association between IL1-RN*1 allele and patchy alopecia areata (p =0.045).


Being such a complex biological process, hair growth biology is still a work in progress. Noetheless, several therapeutic methods, including drugs, surgery, and suppelements have been in use to help those who attempt to restore their hair. None of these approaches are perfect due to the diversity in the causes underlying hair loss. Also, most of chemical drugs and hair transplantation surgeries are accompanied by undesirable side effects.

DreamPharm offers Hair Million to address hair loss problems. Numerous anecdotal cases have demonstrated that this herbal formula based on authentic Chinese herbs actually improves the age-related hair thinning and hair loss among a significant fraction of people who take it regularly. We still do not understand the mechanisms of action as to how Hair Million works to stop hair loss and promote hair growth, despite all the positive anecdotal observations. Neither scientific research nor placebo controlled clinical analysis has been conducted because it will cost dearly. Lack of scientific/clinical research is quite common in herbal arena. Just because science hasn't scrutinized we should not stop taking daily food and herbal supplements altogether: our life must go on until we have better understandings of food and herb. There are two merits in this hair restoration herbal formula: Firstly, Hair Million is relatively inexpensive, and secondly, it is made of edible herbs that are known to be safe when consumed in regular quantities. For scientifically proven prescription medication, check Buy Propecia Online.








Related Web resources:


  • What is hair?
  • Curly Hair
  • Biology of hair growth and development.
  • The phenomenon of hair loss.
  • Methods and treatments for hair loss and baldness.
  • Drugs and hair transplantation surgery for hair loss and baldness.
  • Hair loss linked to other health problems.
  • Baldness by choice and fashion.
  • Alopecia info.
  • Alopecia treatment info.
  • Alopecia treatment info.
  • Hair care info.
  • Hair loss and alopecia research articles: abstracts and source links.



    DHEA has been suggested to provide numerous potential benefits. DHEA (or dehydroepiandrosterone) is converted into androgens (male hormones) or estrogens (female hormones) in the cells.





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