You have started a weight loss treatment and notice that you are losing much more hair than before. You are not alone. More and more women taking GLP-1 medications are reporting this effect, and recent medical research confirms the link. We explain why this happens and what studies show. You will also learn how you can support your hair, from the outside and from the inside, even while undergoing treatment.
In short, you will learn:
What links GLP-1 weight loss medications to hair loss?
Medications used for weight management that act on the GLP-1 pathway have become increasingly used. Active substances include semaglutide, liraglutide, and tirzepatide. The metabolic benefit is real, but they can also be associated with adverse reactions. Among the effects reported with certain treatments is hair loss, especially in the context of rapid weight loss.
More and more patients are reporting a less discussed side effect. It is a matter of visible hair loss a few months after starting treatment.
A 2025 systematic review confirms the association between these medications and hair loss. The risk increases especially in people with rapid weight loss (PMC, 2025). Another study discusses the possible mechanisms of this effect.
It was published in the Journal of the European Academy of Dermatology and Venereology (Buontempo et al., JEADV 2025). The main mechanism is not about the active substance itself. It is about the accelerated rate of weight loss. The body enters a state of metabolic stress and redirects its resources to essential functions, not to hair growth.
What type of hair loss occurs and how long does it last?
The most common form of alopecia associated with GLP-1 treatments is telogen effluvium. It is a diffuse and temporary hair loss. The follicle enters the resting phase earlier than it should. The hair falls out 2 to 4 months after the event that triggered the phenomenon.
A retrospective cohort confirms the increased incidence of telogen effluvium among GLP-1 users. The study was published in the Journal of the American Academy of Dermatology (JAAD, 2025).
Semaglutide and tirzepatide are associated with the most cases. Data presented at the EADV 2025 Congress show the same trend in larger patient samples (Medscape, 2025).
The good news is that acute telogen effluvium usually resolves on its own. It improves in a few months, as weight stabilizes, but also with dietary supplements and topical solutions.
How to prevent hair loss without giving up GLP-1 treatment?
Do not discontinue treatment on your own. Rapid weight loss reduces the intake of protein, iron, zinc, and B-complex vitamins essential for hair.
A protein-rich diet helps the body continue to support hair growth. In addition to diet, use a protocol dedicated to hair.
How ivaHAIR Serum and Keratine 1000 Biotine help you
ivaHAIR Strong Hair Serum is the Ivatherm serum dedicated to diffuse and transient hair loss - telogen effluvium. It is exactly the type of hair loss described in studies about GLP-1.
The most recent clinical study demonstrates the effectiveness of the Ivahair Strong Hair Serum against hair loss.
The study was conducted in 2026 on 20 subjects with telogen effluvium or androgenetic alopecia. Instrumental Trichoscan® evaluation shows the results.
Hair becomes 35% denser and 42% thicker after 6 months of daily application. The first signs of reduced hair loss appear after 3 months. The study also observed a persistent effect; the benefits were maintained for a period even after stopping application.
To further support healthy hair growth, we recommend Keratine 1000 Biotine with the highest concentration of Keratin. It is a hydrolyzed keratin that is easily absorbed. The formula also contains biotin, zinc, copper, and two amino acids from the structure of keratin, L-cysteine and L-methionine. The supplement restores the hair from the inside and supports the root.
The two products cover hair loss from the outside and from the inside, without interfering with the effectiveness of the weight loss treatment.
Frequently Asked Questions
Usually, the hair loss lasts for a few months. Telogen effluvium linked to rapid weight loss improves as weight stabilizes. If it lasts for more than 6 months, you need to consult a dermatologist.
Do not discontinue prescribed treatment on your own. Discuss this side effect with your doctor. Hair loss often improves as the body adapts.
Yes. The serum is applied topically to the scalp and does not interact with oral or injectable treatment. For further confirmation, also speak with your dermatologist or endocrinologist.
The supplement contains keratin, biotin, and minerals, with no known interactions with GLP-1 treatments.
Telogen effluvium is diffuse hair loss across the entire scalp. It usually occurs 2 to 4 months after a stressful event for the body. If the thinning is localized or progressive, see a dermatologist for a clear diagnosis.
The first signs of reduced hair loss usually appear after 3 months of daily serum application. The maximum, full effect, measured instrumentally, is seen at 6 months. The supplement is recommended in 3-month courses.
It is not recommended to stop treatment without medical advice. Hair loss is a known side effect, usually temporary. The decision must be made by the doctor who is monitoring you.
Echipa Ivatherm
Conținutul IvaStories este creat de echipa Ivatherm, brand romanesc de dermatocosmetice fondat de Dr. Rucsandra Hurezeanu. Produsele Ivatherm sunt formulate cu Apă Termală Herculane și sunt testate dermatologic, recomandate de medici specialiști.
Why does hair loss occur during GLP-1 treatment?
In short, you will learn:
What links GLP-1 weight loss medications to hair loss?
Medications used for weight management that act on the GLP-1 pathway have become increasingly used. Active substances include semaglutide, liraglutide, and tirzepatide. The metabolic benefit is real, but they can also be associated with adverse reactions. Among the effects reported with certain treatments is hair loss, especially in the context of rapid weight loss.
More and more patients are reporting a less discussed side effect. It is a matter of visible hair loss a few months after starting treatment.
A 2025 systematic review confirms the association between these medications and hair loss. The risk increases especially in people with rapid weight loss (PMC, 2025). Another study discusses the possible mechanisms of this effect.
It was published in the Journal of the European Academy of Dermatology and Venereology (Buontempo et al., JEADV 2025). The main mechanism is not about the active substance itself. It is about the accelerated rate of weight loss. The body enters a state of metabolic stress and redirects its resources to essential functions, not to hair growth.
What type of hair loss occurs and how long does it last?
The most common form of alopecia associated with GLP-1 treatments is telogen effluvium. It is a diffuse and temporary hair loss. The follicle enters the resting phase earlier than it should. The hair falls out 2 to 4 months after the event that triggered the phenomenon.
A retrospective cohort confirms the increased incidence of telogen effluvium among GLP-1 users. The study was published in the Journal of the American Academy of Dermatology (JAAD, 2025).
Semaglutide and tirzepatide are associated with the most cases. Data presented at the EADV 2025 Congress show the same trend in larger patient samples (Medscape, 2025).
The good news is that acute telogen effluvium usually resolves on its own. It improves in a few months, as weight stabilizes, but also with dietary supplements and topical solutions.
How to prevent hair loss without giving up GLP-1 treatment?
Do not discontinue treatment on your own. Rapid weight loss reduces the intake of protein, iron, zinc, and B-complex vitamins essential for hair.
A protein-rich diet helps the body continue to support hair growth. In addition to diet, use a protocol dedicated to hair.
How ivaHAIR Serum and Keratine 1000 Biotine help you
ivaHAIR Strong Hair Serum is the Ivatherm serum dedicated to diffuse and transient hair loss - telogen effluvium. It is exactly the type of hair loss described in studies about GLP-1.
The most recent clinical study demonstrates the effectiveness of the Ivahair Strong Hair Serum against hair loss.
The study was conducted in 2026 on 20 subjects with telogen effluvium or androgenetic alopecia. Instrumental Trichoscan® evaluation shows the results.
Hair becomes 35% denser and 42% thicker after 6 months of daily application. The first signs of reduced hair loss appear after 3 months. The study also observed a persistent effect; the benefits were maintained for a period even after stopping application.
To further support healthy hair growth, we recommend Keratine 1000 Biotine with the highest concentration of Keratin. It is a hydrolyzed keratin that is easily absorbed. The formula also contains biotin, zinc, copper, and two amino acids from the structure of keratin, L-cysteine and L-methionine. The supplement restores the hair from the inside and supports the root.
The two products cover hair loss from the outside and from the inside, without interfering with the effectiveness of the weight loss treatment.
Frequently Asked Questions
Usually, the hair loss lasts for a few months. Telogen effluvium linked to rapid weight loss improves as weight stabilizes. If it lasts for more than 6 months, you need to consult a dermatologist.
Do not discontinue prescribed treatment on your own. Discuss this side effect with your doctor. Hair loss often improves as the body adapts.
Yes. The serum is applied topically to the scalp and does not interact with oral or injectable treatment. For further confirmation, also speak with your dermatologist or endocrinologist.
The supplement contains keratin, biotin, and minerals, with no known interactions with GLP-1 treatments.
Telogen effluvium is diffuse hair loss across the entire scalp. It usually occurs 2 to 4 months after a stressful event for the body. If the thinning is localized or progressive, see a dermatologist for a clear diagnosis.
The first signs of reduced hair loss usually appear after 3 months of daily serum application. The maximum, full effect, measured instrumentally, is seen at 6 months. The supplement is recommended in 3-month courses.
It is not recommended to stop treatment without medical advice. Hair loss is a known side effect, usually temporary. The decision must be made by the doctor who is monitoring you.
Echipa Ivatherm
Conținutul IvaStories este creat de echipa Ivatherm, brand romanesc de dermatocosmetice fondat de Dr. Rucsandra Hurezeanu. Produsele Ivatherm sunt formulate cu Apă Termală Herculane și sunt testate dermatologic, recomandate de medici specialiști.