Thinning Hair? Here Is Exactly What to Do (Step-by-Step 2026 Guide)
You have noticed your hair looks thinner. Maybe your part is wider than it used to be, your ponytail feels half the size, or you can see more scalp than you are comfortable with. Perhaps you are pulling handfuls from the shower drain or finding hair on your pillow every morning.
This is not something to ignore, and it is not something to panic about. Thinning hair is treatable in the vast majority of cases, but the single most important factor in treatment success is timing. The earlier you identify the cause and begin appropriate treatment, the more hair you keep and the better your results will be.
This guide walks you through exactly what to do, step by step, from identifying the cause through to building a treatment plan that works.
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Step 1: Understand What Is Happening
Thinning hair is different from baldness. When hair thins, the follicles are still present and still producing hair, but each cycle produces progressively finer, shorter, and lighter strands. This process is called follicular miniaturisation, and it is reversible in its early and moderate stages.
The key distinction is between miniaturised follicles (still active, producing thin hair, responsive to treatment) and destroyed follicles (completely inactive, replaced by scar tissue, requiring surgical intervention). If you can see fine, wispy hairs where your hair used to be thick, those follicles are still alive and treatable.
Step 2: Get a Proper Diagnosis
This is where most people go wrong. They buy supplements, shampoos, or book treatments without understanding why their hair is thinning. This is like taking painkillers without knowing what is causing the pain.
A proper diagnosis includes clinical examination of your hair loss pattern (where is thinning occurring, is it diffuse or localised, what does the hairline look like), a hair pull test to assess active shedding, blood work to check iron and ferritin levels (the most common nutritional cause of thinning in women), thyroid function (TSH, T3, T4), vitamin D, zinc, B12, and hormonal profile (testosterone, DHEA-S, particularly for women), and medical history review including medications, recent illness, stress, dietary changes, and family history of hair loss.
At The London PRP Clinic, our GMC-registered doctors conduct this comprehensive assessment for every new patient. We diagnose before we treat.
Step 3: Address Underlying Causes
If blood work reveals deficiencies or imbalances, these must be corrected before or alongside any hair treatment.
Low iron/ferritin is the most common correctable cause of hair thinning, particularly in women. Ferritin levels below 30 ng/mL are associated with hair shedding even when haemoglobin is within normal range. Iron supplementation guided by blood results can reduce shedding within weeks.
Thyroid dysfunction directly disrupts hair growth cycles. Both hypothyroidism and hyperthyroidism cause diffuse thinning. Thyroid medication to restore normal levels often resolves the associated hair loss.
Vitamin D deficiency is endemic in the UK and linked to multiple types of hair loss. Supplementation is straightforward and effective.
Hormonal imbalances including elevated androgens (PCOS), declining oestrogen (menopause), or elevated cortisol (chronic stress) all contribute to thinning and may require targeted management.
No PRP treatment, no supplement, and no medication will produce optimal results if the underlying metabolic cause of your thinning remains unaddressed.
Step 4: Start Treatment
Once underlying causes are identified and addressed, active hair restoration treatment begins.
PRP therapy is the strongest-evidenced regenerative treatment. It delivers concentrated growth factors from your own blood directly to weakened follicles, stimulating them to produce thicker, healthier hair. A 2025 meta-analysis of 43 RCTs (1,877 patients) confirmed PRP significantly increases density (average 31% at 6 months). At The London PRP Clinic: £545/session, 87% success rate.
Minoxidil (topical or oral) stimulates blood flow and extends the growth phase. FDA-approved. Up to 60% of users see improvement. £10 to 30/month. Works synergistically with PRP.
Finasteride (men, prescription) blocks DHT production by 70%. The most effective single pharmaceutical for androgenetic alopecia. 80 to 90% maintain or improve density.
Microneedling amplifies the effectiveness of PRP and minoxidil by creating micro-channels for enhanced delivery. A 2025 meta-analysis confirmed significantly improved hair count compared to medication alone.
Mesotherapy injects vitamins, minerals, and nutrients directly into the scalp for optimal follicular nourishment. Available as part of comprehensive PRP protocols at The London PRP Clinic.
Step 5: Be Patient and Consistent
Hair regrowth is gradual. The hair growth cycle means visible results take time.
Weeks 2 to 4: Reduced shedding (the first measurable improvement). Months 2 to 3: Hair feels thicker and stronger. Months 3 to 4: New growth becomes visible. Months 6 to 12: Optimal results achieved.
Consistency is critical. Skipping treatments, forgetting daily minoxidil, or stopping supplements undermines the cumulative effect that produces meaningful results.
Step 6: Maintain Long Term
Thinning hair driven by genetics is a chronic condition that requires ongoing management. After the initial treatment phase, maintenance involves PRP sessions every 6 to 12 months, continued daily medication and supplements, annual blood work to monitor nutritional levels, and progress photography to track density objectively.
The maintenance burden is significantly lighter than the initial treatment phase. Most patients settle into a routine of 1 to 2 PRP sessions per year alongside daily topical or oral treatment.
The London PRP Clinic by The Wellness: Your Starting Point
Diagnosis-first approach. Every patient receives comprehensive assessment before any treatment recommendation.
87% success rate. Documented and tracked through standardised photography.
GMC-registered doctors. Every treatment performed by qualified medical professionals.
Complete treatment options. PRP (from £545), ExoRevive exosomes (from £445), mesotherapy, pharmaceutical coordination, transplant referral.
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Book your free thinning hair assessment > WhatsApp | Email: team@thewellnesslondon.com | Call: +44 20 3951 3429
Medical Disclaimer: Results vary between individuals. All treatments performed by GMC-registered doctors. Last reviewed March 2026.