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Hevia Hair Science



What makes us different?

Hevia Hair Science (HHS) is a division of Hevia Cosmetic Dermatology created by Dr. Oscar Hevia and Dr. Bernard Cohen.  We specialize in the diagnosis and treatment of hair loss disorders – in both men and women – and we’re serious in our approach. We use sophisticated diagnostic and laboratory analyses to determine the cause (or causes) of your hair loss.  Then we monitor your progress with digital micro-imaging and CST technology.  We can detect the smallest changes in hair loss or growth.  We can even detect hair breakage, and measure its severity.  Hair loss is more than aesthetic… it is often a complex medical disorder.

Plus, we’re experienced dermatologists, focused only on hair loss and not general dermatology. Dr. Cohen, has a 40-year experience in hair loss disorders, and is internationally recognized for his award-winning contributions to the field of hair science.  He is board-certified in both Dermatology and Hair Restoration Surgery.  Dr. Cohen’s style is personalized and patient. His approach to your problem will be comprehensive, scientific, and based on years of accumulated knowledge. Look forward to an encounter that exceeds expectations.



“The first step to recovery is a correct diagnosis.”

On you first visit, Dr. Cohen will perform a detailed, hair-oriented medical history.  He will carefully examine your scalp and hair, and take digital and micro-images. More than ten diagnostic tests will then be performed to determine the quality, quantity, surface distribution, and general health of your hair. Based on his findings, Dr. Cohen will reach a preliminary diagnosis.  For female patients, a series of endocrine, nutritional, and metabolic blood tests are usually needed before reaching a final diagnosis.   In either situation, your treatment can be started on the first visit.

Following discussion of his findings, Dr. Cohen will familiarize you with the treatment options recommended for your specific diagnosis.  He will discuss their cost, convenience, safety, and relative effectiveness.  Rest assured… Every treatment option has been cleared by the FDA and proven to be medically effective. Most forms of hair loss, if treated early, are easy to reverse or stabilize. A measurable response is often seen in several months. Unfortunately, the medical insurance industry (and Medicare) consider hair loss a “cosmetic” disorder. The patient is responsible for payment; however, insurance almost always covers blood testing.



“Medically-prescribed hair loss treatments actually work!”

Treatment will be based on your diagnosis and the severity of your loss. If your diagnosis is a rare or uncommon, it might require a more complex approach. In most cases, the choice of treatment is somewhat flexible. In the majority of cases, the diagnosis usually falls into one of three major categories: thinning, shedding, or breakage … or a combination thereof.

MALE PATTERN BALDING-THINNING – In some cases of mild or early thinning (men and women), we might prescribe a topical minoxidil or a fortified minoxidil prescription. A strong family history, or early onset balding might suggest a more aggressive approach, a variation in dosage, or a combination approach. Some patients do better with oral finasteride, Platelet Rich Plasma injections (PRP), or one of 3 laser light options.

male pattern balding thinning

FEMALE HAIR LOSS – Unlike males with pattern balding, hair loss in women can have a multitude of causes. The loss might indicate internal abnormalities, or foreshadow a problem with becoming pregnant. Patients with abnormal hormone studies might be prescribed anti-androgens, thyroid therapy, or a consultation with an endocrinologist.  Auto-immune disorders, anemia, infections, deficiencies, and metabolic disorders must be ruled out. Sometimes a low zinc, serum ferritin, biotin, or Vitamin D might be a contributing cause.  An elevated DHEAS or testosterone might be another. Most of these imbalances can be adjusted with medication. Breakage caused by salon services is not unusual. Several of the treatments used in male pattern balding should not be used in females.

female thinning

DAMAGE AND BREAKAGE – Sometimes improper haircare can result in damage and/or breakage. But more often, it’s the result of salon processing, i.e. dyes, straighteners, etc. In cases of mild hair breakage, we might suggest preparations that smooth the filament’s surface, and nourish the growing hair from within (at a rate of one half-inch per month). Breakage often co-exists with pattern balding-thinning, and both disorders should be simultaneously treated. In all cases, detailed instructions for haircare are given to patients with breakage, along with an effective hair repair regimen and detangling agents. We have instruments that actually measure the percentage of hair that is broken.  With this information, we’re able to document and follow your response to breakage treatment.

hair breakage and damage

PLATELET RICH PLASMA (PRP) –  PRP is the most recent breakthrough in hair loss treatment.  It’s convenient and 100% safe.  It works equally well in men and women with pattern balding-thinning.  PRP is one of our most effective treatments. We use the most advanced PRP preparation technique that is presently available. Each visit requires an hour of the patient’s time. No pain, no bruises, no bandage, and no aftercare. Hair can be shampooed the same evening. However, patients receiving PRP treatments, must not take aspirin, Advil, Aleve, NSAIDs, or steroids for one week before and three weeks after the PRP session. (Tylenol is fine.)

prp hair loss treatment


“If you don’t measure hair, you can’t manage hair loss.”

Patients are generally evaluated at 4 to 6-month intervals, at which time their diagnostic parameters will be re-measured and/or re-calculated. The numerical data will tell us exactly how well, and how quickly, you’re responding. On the basis of the data, and of course your feedback, your treatment might be adjusted. Any problems or treatment questions will be addressed. You’ll be advised of new treatments, scientific breakthroughs, recent drug warnings and/or recalls. Prescriptions will be changed, added, or simply refilled. If indicated, a previously abnormal blood test will be repeated.




“Complex problems are best solved by experienced practitioners.”

Considering the complexities of hair loss… the diagnosis and treatment can be daunting.  Internet hair loss sites are loaded with misinformation. Ineffective topicals and oral supplements are falsely promoted. Hair stylists, although well-meaning, frequently offer insufficient and/or incorrect advice.  It’s best to consult a board-certified dermatologist who specializes in hair loss alone; One who will not suggest hair transplantation as your primary treatment. At Hevia Hair Science, we offer our patients exactly that. We take pride in our scientific precision, our medical professionalism, and our compassionate understanding of patients with hair loss.  That probably explains why our patients do remarkably well.


Additional Resources

Q & A: Pattern Baldness & Thinning
All About Hair and Hair Loss


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