Why Hair Loss Can Be the Body’s First Red Flag
Hair might be emotionally important, socially significant and surprisingly good at ruining a perfectly decent morning, but biologically, it is non-essential. The body can function without producing thick, glossy hair, but it cannot afford to neglect the brain, heart, lungs or other vital organs. This helps explain why changes in hair growth can sometimes appear when the body is under nutritional, metabolic or physiological pressure.
The Triage Theory, developed by biochemist Dr Bruce Ames, proposes that when nutrients are in limited supply, the body prioritises the processes needed for immediate survival over those involved in long-term maintenance. Much like a hospital responding to an emergency, resources are directed towards the most urgent functions first. Hair growth, despite being highly demanding, sits much further down that priority list.
It’s Not Just About Hair
Hair loss is an early warning sign. But if this triage state continues, the body starts pulling back from multiple systems:
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Hormone production (thyroid, oestrogen, testosterone)
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Gut lining repair and enzyme production
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Immune regulation
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Liver detoxification
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Collagen synthesis
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Brain signalling and memory
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Egg quality and ovulation
The longer you stay in “triage mode,” the more this internal underfunding shows up: fatigue, gut issues, low libido, anxiety, brittle nails, dull skin, irregular cycles..and hair loss.
What Puts You in Triage Mode?
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Nutritional deficiencies (protein, iron, B12, zinc, magnesium, omega-3s)
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Chronic under-eating or fasting without recovery
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Poor sleep or high cortisol
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Gut inflammation or poor absorption
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Blood sugar instability
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Infections or long-term inflammation
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Excess alcohol or environmental toxins
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Mitochondrial dysfunction or low oxygen delivery
Hair loss is often a sign that your body is diverting energy and resources away from growth to keep you functioning. The Triage Theory reminds us that real healing begins when the system is adequately nourished, oxygenated and regulated. Hair may be non-essential to survival, but it can still offer an early and useful glimpse of what is happening beneath the surface.
