Hair Loss Specialist

Hair loss is often framed as a problem that primarily affects men, but by age 50, roughly half of all adults, women included, are affected by male-pattern or female-pattern hair loss. At Liondale Medical on the Upper West Side of Manhattan, Lionel Bissoon, DO, treats hair loss by identifying its actual underlying cause first, then building a treatment plan around that cause rather than defaulting to a single generic solution regardless of what's actually driving it. This distinction matters more than it might seem: two patients with visually similar thinning can have entirely different underlying drivers, and a treatment matched to the wrong cause, however well-intentioned, often produces disappointing results.

Why Treating the Cause Matters More Than Treating the Symptom

The hair loss industry is full of products and treatments that address hair loss generically, a shampoo, a supplement, a topical serum, without first determining why hair is actually falling out. This matters because hair loss has genuinely different causes with genuinely different treatments, and applying the wrong one, even a reasonably good one, often produces disappointing results simply because it wasn't matched to the actual problem. At Liondale Medical, every hair loss evaluation starts with identifying cause before recommending treatment.

What Actually Causes Hair Loss

Hair loss occurs for a wide range of reasons, and untangling which applies to you is the essential first step. Common contributing factors include chronic stress, illness, physical trauma, a high fever, inflammation, fungal infections, nutrient deficiencies, hormonal changes, sudden or significant weight loss, and various systemic diseases.

The single most common cause, however, is androgenetic alopecia, more commonly known as male or female pattern baldness. This is an inherited condition in which hair follicles become overly sensitive to hormones, specifically dihydrotestosterone (DHT), a byproduct of testosterone, which gradually shrinks the follicle until it stops producing hair altogether. This process is genetic and hormonal, which is part of why generic, non-targeted treatments often underperform for pattern hair loss specifically.

When Hair Loss Shows Up in Eyebrows, Lashes, or Facial Hair

Hair loss isn't always confined to the scalp, and when it shows up elsewhere, the underlying cause is often different too. Women frequently lose eyebrow hair due to hormonal changes at menopause or from low thyroid hormone levels. Both women and men can experience hair loss in eyebrows, eyelashes, or facial hair (mustache and beard) due to a condition called alopecia areata, an autoimmune condition in which the immune system mistakenly attacks hair follicles, triggering inflammation and hair loss in patches. Recognizing this pattern, hair loss outside the scalp specifically, is often what points toward an autoimmune or hormonal cause rather than androgenetic alopecia.

Your First Appointment: Diagnosis Before Treatment

At your first visit, Dr. Bissoon performs a thorough medical evaluation specifically for hair loss, paired with comprehensive lab work designed to identify the actual underlying cause rather than guessing based on presentation alone. This typically includes hormone panel testing, thyroid function assessment, and screening for nutrient deficiencies that commonly contribute to hair thinning. From there, a customized treatment plan is built around what your specific evaluation actually reveals.

If lifestyle factors are contributing, whether that's significant unintentional weight loss, over-exercising, or a nutrient gap from diet, Dr. Bissoon addresses those factors directly as part of the plan, since treating hair loss without addressing an active underlying driver tends to produce only temporary or partial results.

Platelet-Rich Plasma (PRP) for Hair Restoration

PRP therapy uses your own blood, processed to concentrate plasma containing three to five times more platelets than what's typically found in circulating blood. These platelets release growth factors that stimulate new hair growth, slow ongoing hair loss, and increase the thickness of existing hair. PRP is often used as a standalone treatment, but it's also commonly combined with other regenerative approaches like stem cells and exosomes for a more comprehensive effect on follicle health.

Stem Cells and Exosomes: Regenerative Approaches to Hair Restoration

Stem cells occur naturally throughout your body, where they continuously self-replicate and generate new cells used to heal and replace damaged tissue. When injected directly into hair follicles, stem cells can stimulate new hair growth by supporting the follicle's own regenerative capacity rather than simply masking the appearance of thinning.

Exosomes are tiny vesicles secreted by stem cells and other cells throughout the body. These vesicles carry RNA and proteins that get absorbed by nearby cells, effectively delivering the biological information and tools those cells need to support healing and regeneration. At Liondale Medical, exosome treatments for hair restoration are often paired with PRP or stem cell therapy as part of a broader regenerative protocol targeting follicle health from multiple angles simultaneously.

Bioidentical Hormone Replacement for Hormone-Driven Hair Loss

When hair loss is caused by declining hormone levels, a common issue for women navigating menopause and men experiencing age-related testosterone decline, Dr. Bissoon may recommend bioidentical hormone replacement therapy as part of the treatment plan. Because pattern hair loss is fundamentally a hormone-sensitivity issue at the follicle level, addressing the broader hormonal picture can meaningfully support results from more targeted regenerative treatments like PRP or stem cells, rather than working against them.

Nutrition Therapy for Deficiency-Driven Hair Loss

When lab results reveal that a nutrient deficiency, iron, zinc, biotin, vitamin D, and others are all commonly implicated, is contributing to hair loss, Dr. Bissoon recommends targeted nutrition therapy. This can include supplementation, a structured meal plan designed around your specific deficiency, or IV therapy for more direct nutrient repletion when oral supplementation alone isn't sufficient or fast enough to meet your goals.

Building a Combined Treatment Plan

Most patients don't have a single, isolated cause of hair loss, they have some combination of genetic predisposition, hormonal influence, and nutritional status all contributing simultaneously. This is why Dr. Bissoon's treatment plans frequently combine approaches: PRP alongside hormone optimization, for instance, or nutrition therapy paired with stem cell treatment. The specific combination is determined by your evaluation results rather than applied as a fixed package to every patient who comes in with thinning hair.

What Results and Timeline Look Like

Hair restoration treatments generally work by supporting and stimulating existing follicles rather than creating new ones from nothing, which means results build gradually rather than appearing overnight. Most patients begin to notice reduced shedding within the first few weeks to months of starting treatment, with visible improvements in thickness and density typically becoming apparent over three to six months as new hair growth cycles progress. Because hair growth happens in cycles, consistent treatment over this timeline, rather than a single session, tends to produce the most meaningful and lasting results.

Who Tends to Be a Good Candidate

Good candidates for hair restoration treatment generally include patients in the earlier to moderate stages of hair thinning, where follicles are miniaturized but not yet completely dormant, since regenerative treatments work by stimulating existing follicle activity rather than creating entirely new follicles. Patients with an identifiable, treatable underlying cause, whether hormonal, nutritional, or autoimmune, also tend to see strong results once that cause is addressed directly. Dr. Bissoon's evaluation process is designed to determine candidacy specifically for you, rather than assuming a generic treatment will work regardless of your particular presentation.

Male vs. Female Pattern Hair Loss: Why the Presentation Differs

Although androgenetic alopecia affects both sexes, it typically presents differently, and recognizing which pattern you're dealing with helps guide treatment. In men, pattern hair loss usually starts at the temples and crown, progressing toward a more complete bald patch over time in a fairly predictable sequence. In women, the pattern is typically more diffuse, an overall thinning across the crown and part line rather than a receding hairline or bald spot, and complete baldness is far less common. Because female pattern hair loss is more diffuse, it can be easier to overlook in its early stages, and women often don't seek treatment until thinning has become fairly noticeable, which is part of why early evaluation matters even when the change feels subtle at first.

Combining Medical Treatment With Practical Styling Support

While medical treatment addresses the underlying cause and works to slow or reverse hair loss over time, most patients also want guidance on managing appearance during the treatment period, since regenerative results build gradually rather than instantly. Dr. Bissoon and the Liondale Medical team can discuss practical interim options alongside your medical treatment plan, including styling adjustments that minimize the visual impact of thinning and, for patients interested, camouflage products or topical concealers that can be used safely alongside your ongoing regenerative or hormonal treatment. This isn't a substitute for addressing the underlying cause, but it's a genuinely useful part of managing the experience of hair loss while your treatment plan takes effect.

What Happens If Treatment Doesn't Fully Restore Density

It's worth being honest that regenerative and hormonal treatments, while often quite effective, don't guarantee complete restoration to pre-loss density in every case, particularly in areas where follicles have been dormant for a long period before treatment begins. This is part of why early evaluation and treatment tend to produce better outcomes than waiting until hair loss is advanced. For patients whose follicles are too far along to respond fully to regenerative treatment, Dr. Bissoon will discuss this honestly during your evaluation and follow-up visits, rather than continuing an ineffective treatment indefinitely, and can advise on realistic expectations and any additional options worth considering.

Connecting Hair Loss to Your Broader Health Picture

Hair loss rarely exists in complete isolation from the rest of your health, and treating it as part of a broader plan often produces better, more sustainable results. Patients whose hair thinning is tied to broader hormonal aging often benefit from pairing hair restoration with our anti-aging services, which address the underlying hormonal and nutritional picture more comprehensively. Those specifically dealing with tissue repair alongside hair concerns may also explore our broader regenerative medicine offerings.

Frequently Asked Questions

What is the most common cause of hair loss?

Androgenetic alopecia (male or female pattern baldness) is the most common cause, an inherited condition where hair follicles become overly sensitive to hormones, particularly DHT, gradually shrinking until they stop producing hair.

How is hair loss diagnosed at Liondale Medical?

Through a thorough medical evaluation combined with comprehensive lab work, including hormone panels, thyroid function testing, and nutrient deficiency screening, to identify the actual underlying cause before recommending treatment.

How does PRP therapy work for hair restoration?

PRP uses your own concentrated plasma, rich in platelets that release growth factors stimulating new hair growth, slowing shedding, and increasing the thickness of existing hair.

How long does it take to see results from hair loss treatment?

Most patients notice reduced shedding within weeks to a few months, with visible improvements in thickness and density typically developing over three to six months as hair growth cycles progress.

Can hair loss be reversed if it's caused by a hormone imbalance?

Often, yes. Addressing the underlying hormonal imbalance through bioidentical hormone replacement therapy, sometimes combined with PRP or stem cell treatment, can meaningfully improve hair loss driven by hormonal causes.

Is hair loss treatment available near me in NYC?

Yes, Liondale Medical treats hair loss at our Upper West Side Manhattan location and sees patients from across the greater New York City area.

If you're noticing excessive thinning or a receding hairline, call Liondale Medical or schedule an appointment online.