According to hair health experts, thinning hair often serves as an initial physical indicator that internal body systems are out of balance, with individuals typically losing at least 20 percent of their hair volume before noticing any change. While everyday shampoos and serums are widely marketed as quick fixes, specialists emphasize that thinning hair stems from diverse causes requiring targeted, evidence-based responses rather than a single universal cure.
Hormonal Shifts and Menopause Hair Loss
For women navigating perimenopause and menopause, falling oestrogen levels frequently trigger sporadic shedding and gradual strand thinning, as oestrogen acts as a protective hormone for the scalp and hair. Furthermore, sensitivity to dihydrotestosterone (DHT)—a hormone that attacks and shrinks hair follicles—increases during this life stage. According to nutrition expert Suzanne Cooper, founder of the hair nutrition brand GLOWWA, natural DHT blockers like pumpkin seeds can offer a gentler approach compared to prescription treatments such as minoxidil, which can carry side effects like anxiety, low mood, and low libido.
Ageing and Natural Density Changes
Hair quality and density shift naturally with age independently of major hormonal events. Anabel Kingsley, lead trichologist and brand president at Philip Kingsley, notes that individuals will not maintain the exact same hair density in their 60s or 70s as they experienced in their 20s. While genetics play a primary role, lifestyle, environmental factors, and the natural ageing of the scalp tissue itself contribute to these structural shifts, making gentle cleansing and targeted hydration increasingly important over time.
Nutrition, Gut Health, and Anti-Inflammatory Diets
Dietary habits directly impact follicle health and systemic inflammation. Cooper stresses that food should serve as the primary intervention when internal imbalances arise, highlighting anti-inflammatory nutrients such as methylsulfonylmethane (MSM), which can be found in leafy greens like kale and spinach. According to Cooper’s research, MSM reduces blood inflammation, a key biological driver that pushes hair prematurely out of its growth phase and into shedding.
Telogen Effluvium Caused by Stress and Illness
Unlike genetic pattern hair loss, telogen effluvium is a non-permanent condition triggered by internal physical or psychological stressors. Kingsley explains that this form of shedding occurs in response to disturbances such as severe illness, nutritional deficiencies—specifically low iron or ferritin—rapid weight loss, thyroid imbalances, intense stress, general anaesthesia surgery, or childbirth. Because hair acts as a non-essential tissue, the body treats it as dispensable during periods of systemic stress.
Proper Scalp Care and Styling Habits
Daily maintenance practices significantly influence strand strength and overall scalp health. Kingsley cautions that regular shampooing does not cause hair loss; rather, it merely dislodges hairs that have already detached inside the follicle and are waiting to shed. In fact, neglecting to wash the scalp frequently enough can exacerbate hair thinning. While colouring and perming can still weaken older hair strands, incorporating leave-in treatments, conditioners, and gentle scalp massages can help protect against breakage and support localized circulation.
Pro Tip: Male and female pattern hair losses are progressive conditions. According to trichologists, treating these forms of thinning early makes it significantly easier to maintain existing hair density than to attempt regrowing lost hair later.
Frequently Asked Questions
What is the normal amount of daily hair shedding?
According to the Health Service Executive (HSE), losing between 50 and 100 hairs a day is considered a normal part of the hair growth cycle.
Can blood tests help identify the cause of hair loss?
Yes. Consulting a general practitioner for blood tests can highlight internal deficiencies, such as low iron or ferritin levels, that contribute to excessive shedding.
Is telogen effluvium permanent?
No. Kingsley states that telogen effluvium is neither permanent nor progressive, and the excessive shedding will stop once the underlying internal trigger is identified and addressed.
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