Why Is My Hair Shedding More Since Starting a GLP-1 Medication?
GLP-1 medications have become increasingly common, and some patients notice an unexpected change while taking them: more hair coming out in the shower, brush, or throughout the day.
That often leads to the question:
“Why is my hair shedding so much more since I started a GLP-1 medication?”
Recently, a 42-year-old woman returned to our dermatology practice with hair loss that had been present for several years but had become more noticeable since starting a GLP-1 medication.
Her history was complex. In addition to GLP-1 use, she was receiving hormone replacement therapy and reported a long history of chemical and thermal hair-straightening treatments dating back to approximately age 12.
On examination, she had diffuse hair shedding and a positive hair-pull test for telogen hairs. Her findings were most consistent with chronic telogen effluvium, with a possible component of androgenetic alopecia (female pattern hair loss).
After discussing medications, supplements, red-light therapy, PRP, and Alma TED, she elected to proceed with her first PRP hair-restoration treatment.
Her case illustrates why increased shedding after starting a GLP-1 medication does not necessarily have one simple explanation.
Can GLP-1 Medications Cause Hair Loss?
Patients increasingly report noticing hair shedding while taking GLP-1 medications.
However, when hair loss becomes noticeable during GLP-1 treatment, it is important not to automatically assume that the medication itself is directly damaging the hair follicles.
Hair shedding can be influenced by multiple factors, including:
Changes in weight
Changes in nutrition
Increased nutritional demands
Physiologic stress
Hormonal changes
Illness
Medications
Iron or other nutritional deficiencies
Underlying genetic hair loss
Significant or rapid changes in the body can potentially disrupt the normal hair-growth cycle and contribute to telogen effluvium.
For this patient, the timing of increased shedding after beginning her GLP-1 medication was clinically relevant, but it was not the only factor considered.
What Is Telogen Effluvium?
Telogen effluvium (TE) is a form of excessive hair shedding.
Hair normally cycles through growth, transition, resting, and shedding phases.
When the body experiences a significant physiologic or emotional stressor, a larger-than-usual percentage of hairs may shift into the resting phase and subsequently shed.
Patients often notice:
More hair in the shower
Hair collecting in brushes
Loose strands on clothing
Reduced overall volume
A thinner ponytail
Increased scalp visibility
This patient demonstrated diffuse shedding and a positive hair-pull test for telogen hairs, supporting the diagnosis of telogen effluvium.
Why Is My Hair Loss Worse on a GLP-1 if I Was Already Thinning Before?
This is an important distinction.
Our patient reported that her hair loss actually began several years before her current evaluation.
She simply noticed that it became more prominent after starting the GLP-1 medication.
That means it would be inaccurate to attribute her entire history of hair loss to the GLP-1.
Instead, her clinical picture suggested a multifactorial process.
She had chronic telogen shedding, possible underlying androgenetic alopecia, hormone replacement therapy, and a longstanding history of chemical and thermal hair treatments.
The GLP-1 medication represented one additional factor to consider within that larger picture.
Can Weight Changes Trigger Hair Shedding?
Significant changes in weight or nutritional intake can place physiologic stress on the body.
In some individuals, that can affect the normal hair-growth cycle and contribute to telogen effluvium.
This is one reason a dermatologist evaluating hair loss during GLP-1 therapy may ask about more than the medication itself.
Changes in diet, protein intake, weight, nutritional status, recent illnesses, hormone changes, and other medications can all provide important clues.
The goal is to identify potential contributors rather than automatically blaming one medication.
Could Female Pattern Hair Loss Be Happening at the Same Time?
Yes.
This patient's examination suggested chronic telogen effluvium with a possible androgenetic alopecia component.
Female pattern hair loss and telogen effluvium are different conditions.
Telogen effluvium primarily causes increased shedding, while androgenetic alopecia causes progressive follicular miniaturization and loss of density.
A patient can have both.
When that happens, an episode of increased shedding may make underlying patterned thinning much more noticeable.
Can Hormone Replacement Therapy Affect Hair?
Hormonal changes can be relevant when evaluating hair loss.
This patient was receiving hormone replacement therapy, so that history was considered as part of her overall evaluation.
However, hair loss should not automatically be attributed to hormone replacement therapy simply because a patient is using it.
The type of hormone therapy, timing, other medications, underlying hair-loss pattern, nutritional status, and medical history can all matter.
Her overall presentation was therefore approached as potentially multifactorial.
Can Years of Chemical Straightening Affect the Hair?
This patient also reported using chemical and thermal straightening treatments since approximately age 12.
Repeated chemical processing and excessive heat can damage the hair shaft and contribute to breakage.
Certain styling practices that repeatedly create tension can also contribute to traction-related hair loss.
Hair-shaft damage and follicular hair loss are not necessarily the same thing, which is another reason a scalp examination can be useful when someone has a long history of intensive styling practices.
For this patient, her styling history was considered alongside her medical and medication history rather than being assumed to be the sole explanation.
What Treatments Can Be Considered for Chronic Hair Shedding?
Several options were discussed during this patient's consultation, including:
Topical minoxidil
Oral minoxidil
Spironolactone
Nutrafol or other nutritional supplements
Red-light therapy
Platelet-rich plasma (PRP)
Alma TED
Each option has potential advantages and limitations.
The best approach depends on the suspected cause of hair loss, medical history, treatment preferences, and whether shedding, patterned thinning, or both are present.
Should I Use Topical or Oral Minoxidil?
Both approaches were discussed.
A compounded topical minoxidil 10% treatment was one option.
Potential side effects of topical minoxidil include:
Scalp irritation
Dryness
Itching
Unwanted facial hair growth
Oral minoxidil 2.5 mg was also discussed as a possible treatment.
Oral minoxidil use for hair loss is off-label.
Potential adverse effects can include:
Unwanted facial or body hair growth
Dizziness or lightheadedness
Headache
Swelling or fluid retention
Palpitations
Increased heart rate
Low blood pressure
Rarely, more significant cardiovascular effects can occur.
After reviewing the options, this patient chose PRP rather than beginning minoxidil at this visit.
What About Spironolactone?
Spironolactone was another medical treatment discussed because an androgenetic alopecia component was possible.
Potential adverse effects reviewed included:
Increased urination
Dizziness
Low blood pressure
Breast tenderness
Menstrual irregularities
Elevated potassium levels
Spironolactone is used off-label for female pattern hair loss and is not appropriate for every patient.
Do Hair Supplements Help With GLP-1 Hair Shedding?
Supplements such as Nutrafol and other nutritional hair-support products were discussed.
Supplements may be particularly relevant when nutritional deficiencies or increased nutritional demands are contributing to shedding.
However, a supplement cannot be expected to correct every cause of hair loss.
If a patient has chronic telogen effluvium, androgenetic alopecia, iron deficiency, thyroid disease, or another medical contributor, the underlying problem should also be addressed.
Supplements can also cause side effects, including gastrointestinal upset, and should be considered in the context of a patient's overall medical regimen.
Can Red-Light Therapy Help?
Red-light or low-level light therapy is a noninvasive option that may be incorporated into some hair-loss treatment plans.
Patients need to understand that results can vary and consistent, ongoing treatment is typically necessary.
For someone who prefers to minimize medications, light-based therapy may be an option to discuss.
Why Did This Patient Choose PRP?
After reviewing the available treatments, this patient elected to proceed with platelet-rich plasma therapy.
PRP uses platelet-rich components prepared from the patient's own blood and injected into targeted areas of the scalp.
PRP may help improve hair density or reduce shedding in some appropriately selected patients, but response varies.
It is not a guaranteed cure for hair loss.
Potential risks include:
Pain or tenderness
Swelling
Bruising
Bleeding
Infection
Incomplete or unsatisfactory improvement
Patients may also require a series of treatments followed by maintenance sessions depending on their treatment plan and response.
What Happens During PRP Hair Treatment?
This patient's first PRP session was performed during the visit.
Blood was drawn using sterile technique and then centrifuged to separate the platelet-rich plasma.
The PRP was transferred into sterile syringes and injected into the scalp in the subdermal space.
A total of 7 cc of PRP was administered.
Cooling with a Zimmer device was used for pain control.
The patient tolerated the procedure well without complications.
What Should You Do After PRP?
After treatment, this patient was advised to:
Wash her hair in a warm shower
Use sulfate-free shampoo
Continue prescribed hair-loss medications or supplements
Continue topical minoxidil if using it
Avoid coloring or dyeing the hair for approximately two to three days
Post-procedure instructions may vary depending on the individual patient and treatment protocol.
Is One PRP Session Enough?
PRP is generally not approached as a one-time guaranteed treatment.
Some patients may require multiple treatments and subsequent maintenance sessions.
Response also varies.
That means one patient may notice meaningful improvement while another may experience more modest changes.
Realistic expectations are an important part of deciding whether PRP fits a patient's goals.
What About Alma TED?
Alma TED was discussed as an alternative procedural or device-based hair-restoration option.
Like PRP, results can vary, and patients may require a series of treatments.
This patient chose PRP after reviewing both approaches.
Other patients may prefer Alma TED, medications, light therapy, or a combination plan depending on their diagnosis and preferences.
What if I Also Have Flaking or an Itchy Scalp?
This patient's visit identified another condition: seborrheic dermatitis.
Scaly pink-orange plaques were present on the scalp.
Seborrheic dermatitis is a chronic condition that can fluctuate between periods of improvement and flaring.
She was prescribed:
Ketoconazole 2% shampoo, used on the scalp one to three times per week for maintenance.
She was also prescribed fluocinonide 0.05% topical solution, applied to the scalp as directed during flares.
Treating a scalp condition such as seborrheic dermatitis does not necessarily treat the underlying telogen effluvium, but maintaining scalp health can still be an important part of a comprehensive hair-care plan.
Should You Stop Your GLP-1 Medication if Your Hair Starts Falling Out?
Hair shedding alone does not mean a patient should independently stop a prescribed GLP-1 medication.
The first step is determining what may be contributing to the hair loss.
For some patients, factors associated with weight change, nutrition, physiologic stress, or an underlying hair-loss disorder may be more relevant than a direct medication effect.
Any decision to change or discontinue a GLP-1 medication should be discussed with the healthcare professional who prescribed it.
When Should You See a Dermatologist for Hair Shedding on a GLP-1?
Consider an evaluation if:
Hair shedding becomes noticeably heavier
Your ponytail or overall density is decreasing
Shedding continues for several months
You had hair thinning before starting the GLP-1
Your scalp is becoming increasingly visible
You have a history of hormonal changes or nutritional deficiencies
You use frequent chemical, heat, or tension-based styling
You are unsure whether you have shedding, patterned hair loss, breakage, or more than one condition
A detailed history and scalp examination can help determine which factors may be relevant.
More Hair Falling Out Since Starting a GLP-1? The Medication May Not Be the Whole Story
For this 42-year-old woman, hair loss had existed for years but became more noticeable after she started a GLP-1 medication.
Her examination demonstrated diffuse shedding and a positive hair-pull test consistent with chronic telogen effluvium, with a possible androgenetic alopecia component.
But the GLP-1 was only one part of her history.
She was also using hormone replacement therapy and had undergone chemical and thermal hair straightening since adolescence.
After reviewing minoxidil, spironolactone, supplements, red-light therapy, PRP, and Alma TED, she chose PRP and completed her first treatment with 7 cc injected into the scalp.
Her case illustrates an important point:
If your hair starts shedding more while taking a GLP-1 medication, don't automatically assume there is only one cause.
At Village Dermatology in Houston and Katy, Texas, we evaluate telogen effluvium, androgenetic alopecia, medication-associated shedding, scalp disorders, and other causes of hair loss to develop an individualized treatment plan.
If you have noticed increased shedding since beginning a GLP-1 medication, a dermatologic hair-loss evaluation can help determine what may be contributing and whether options such as minoxidil, PRP, red-light therapy, Alma TED, or other treatments are appropriate.
