Edit The life cycle of hair

<p><strong>The Life Cycle of Hair.</strong></p> <p>Hair growth occurs in three main phases:</p> <p><em><strong>Anagen phase (approximately 80-90% of hair</strong></em>) – This involves a good blood supply to the follicle allowing for active growth of the hair shaft by approximately 1cm every 28 days. In a healthy state this phase lasts up to 7 years.</p> <p><strong><em>Catagen phase (approximately 1-2% of hair)</em></strong> – During this short phase lasting only 2-3 weeks we see the blood supply to the follicle shut off, preventing healthy growth and producing thin wispy hair.</p> <p><strong><em>Telogen phase (approximately 10-15% of hair)</em></strong> – Having lost its blood supply, the hair shaft is shed, and the remaining follicle remains dormant for up to three months. This explains the one hundred or so hairs we lose in a single day as part of normal hair shedding. In a healthy state, the bloody supply will reconnect to the hair follicle and re-enter the growth (anagen) phase.</p> <p>In our next blog, we explore what happens when these healthy states of hair growth undergo internal changes resulting in thinning and hair loss.</p> <p><em><strong>References</strong></em></p> <p>_{(1) American Crystallographic Association (ACA). "New structural features of human hair discovered." ScienceDaily. ScienceDaily, 29 July 2015}<br />_{(2) https://www.theguardian.com/uk/2004/may/27/sciencenews.research}<br />_{(3) https://www.rogaine.ca/about-hair-loss/reasons-for-hair-loss}</p>

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