This sciencebegan in400BCwhenHippocrates (considered the father of modern medicine) noticedthateunuchsdid not becomebald, and from therethey lefttheresearch toinvestigatethis phenomenon.
Galenbetween129and199BCbelieved thathair growthwas linkedto the moodof the individual.
This belieflasteduntil 1800AD.Onlyin 1926 aresearcher WilliamH.Drynoticeda sort ofcycleof growth,whichwas subsequentlydisseminatedaround theworldby various researchersin Hamilton, WilsonJD, Ludwigand others.
Gradually,theresearchhas discreditedmany differentbeliefs andcustomsof different culturesup to thepresent day.In 1997, thebiotechnologistDr. Sebastiano Zappalahas suggestedthetriangletrichologicalbasedon the collaborationof threeimportant figures: dermatologist, biotechnologistandhairdresser, so that, each with their own skillscan helpyou get the bestresultson the variousanomaliestrichological.
Today,the phasesof the hairare well known:ANAGEN(growth), CATAGEN(rest), TELOGEN(fall). This cyclethroughouta lifeis a continuationfor menabout 20/25times, while for women, 10/15times. Hair hasalwaysbeen of great importance, both in the distinctionof sexuality, both as a gaugeofold age (brizzolatura) through lossof color. In ancient timesandin the mythology ofthe valuethat was givento the hairincludedmany aspects, some examples: •The strengthof Samsonwas believedthat it camefrom histhick head. •The wealthand power ofmonarchswas demonstratedby thepomposityof the head, which was further enhanced bycrowns orpompouswigs. •Chastitywas representedby the monksbyshaving andthetonsure. •Julius Caesarworea laurel wreathon his headto hide thebaldingconsidered a signofweakness and loss ofvirility. •For women,the hairhas always beenconsidered an element ofabsolutefemininityto beableto charmyouto exercisenegative poweras in the caseof witches,whichwere shavedas punishmentfordistruggergliany negative influences, andthenburned. •Women alsobaddeal,if discoveredthey weredeprived of theirhairin order to makecleartheir sinanddeprive themof an importantseductive power.
Todaythe cult of thehairhas onlyapurely aestheticgroundsin flux, one wonders whyitis spentgreat energyand money ifthey no longer havea physiological functionofcoverageorsocial significance. The answeris givenbypsychological and anthropologicalstudiesthatstill regardthe hairun'importateelement of seduction, personalityandgender identification.