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Glossary Growth Retardation

condition where physical development is significantly slower than average

Growth Retardation, also known as Stunted Growth or Growth Delay, refers to a condition where an individual's physical development is significantly slower than the average for their age and sex. This can be due to a variety of factors including genetic conditions, chronic illnesses, malnutrition, or hormonal imbalances. In the context of hair, growth retardation can manifest as slower hair growth or thinning, often linked to underlying health issues or nutritional deficiencies.

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Research

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research In Vivo Assessment of Hair Growth Retardation by Ant Oil in Neonatal Mice

July 2025 in “Avicenna Journal of Medicine”

In this study, traditionally prepared ant oil reduced hair regrowth by about 50% in neonatal mice without causing skin irritation, suggesting its potential as a natural alternative for managing unwanted hair, although further research is needed to confirm these effects.

research Growth retardation and hair loss in transgenic mice overexpressing human H-ferritin gene

8 citations , October 2012 in “Transgenic Research”

This study found that transgenic mice overexpressing human H-ferritin showed mild growth retardation and a temporary hairless phenotype, highlighting H-ferritin's physiological roles.

research Single-cell transcriptomics reveals hair growth retardation mediated by aberrant connective tissue sheath contraction in male androgenetic alopecia

February 2026 in “Nature Communications”

This study combined spatial and single-cell transcriptomics to identify that hypercontractility of the connective tissue sheath activates PIEZO1 in hair follicles, leading to miniaturization in male androgenetic alopecia, and found that inhibiting this contraction improves hair growth in models.

research The effect of glycyrrhizic acid and aqueous licorice extract on hair growth retardation : in vitro mechanistic and efficacy studies in human

January 2016

This study found that gels containing glycyrrhizic acid and aqueous Glycyrrhiza glabra extract significantly reduced underarm hair growth in terms of area, thickness, length, and number compared to their gel bases.

research 875 Ablation of Crif1 in hair follicle stem cells lead to hair growth retardation in adult mice

April 2019 in “Journal of Investigative Dermatology”

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Community Join

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community Why are people so negative regarding Clascoterone (Breezula)?

20 upvotes 4 months ago

Clascoterone (Breezula) shows promising hair growth results, but skepticism remains due to past disappointments with new treatments. It may be a good alternative for those who can't tolerate finasteride or dutasteride, and can potentially be combined with them and minoxidil for better results.

community manager told me i have to stop using minoxidil

in Minoxidil 593 upvotes 1 year ago

A manager told an employee to stop using minoxidil, fearing it could unintentionally cause hair growth in others. The conversation is filled with humorous and sarcastic responses, questioning the manager's logic and suggesting the employee continue using the treatment secretly.

community DHT is NOT very important for adults, is it?

124 upvotes 5 months ago

A user experienced negative side effects, including low libido and lack of motivation, after using finasteride for hair loss and felt better after stopping it. Others shared similar experiences with finasteride and dutasteride, while some reported no side effects, showing varied individual responses.

community How finasteride lowers brain's happiness steroid allopregnanolone and causes depression: systemic dihydroprogesterone crosses blood brain barrier, you don't even need finasteride and brain 5ar for that

288 upvotes 1 year ago

Finasteride may lower allopregnanolone levels, potentially affecting mood, but many users report improved mental health due to reduced hair loss. Experiences with finasteride and dutasteride vary, with some experiencing side effects and others finding them beneficial for hair retention and overall happiness.

community Drinking minoxidil lands human in ICU with shock and heart failure

in Minoxidil 804 upvotes 2 years ago

A person mistakenly drank an entire bottle of topical minoxidil, leading to ICU admission with shock and heart failure. The incident highlights the dangers of ingesting topical treatments and the importance of proper usage and dosage.

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Clinics

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All 154 clinic results →

Learn

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learn Hair Transplant

Surgery that moves hair follicles from the back of the scalp to thinning areas

When will I see new hair growth after a hair transplant? New hair growth usually starts 2-4 months after a hair transplant.

learn Caffeine

Does caffeine stimulate hair growth or only slow hair loss? Caffeine stimulates hair follicles in laboratory cultures, and one open-label, manufacturer-funded trial in 210 men found a 0.2% caffeine topical non-inferior to minoxidil 5% on an anagen-ratio endpoint. A 2025 systematic review found only a few small controlled trials, mostly rated low or very low quality, and none in alopecia areata.

learn Lavender

Does lavender promote hair growth or just soothe an irritated scalp? A 2016 study found more hair growth in mice treated with lavender oil, but no trial has tested lavender alone for hair loss in people. Lavender oil can cause skin allergy, and case reports link lavender products to breast growth in children.

learn Dexpanthenol

Does dexpanthenol promote hair growth? Reviews describe dexpanthenol mainly as a moisturiser for skin. No controlled trial has shown that it promotes hair growth.

learn Microneedling

How does microneedling boost hair growth in thinning areas of the scalp? Small trials suggest microneedling may help mainly as an add-on to minoxidil; how it works in humans is not established, and the FDA has not cleared any microneedling device for hair loss.

learn KY19382

Experimental compound that activates hair-growth signals, tested only in animals

learn Osteopontin

Signalling protein studied in hair-growth research

learn Hair Fibers

cosmetic product that temporarily makes hair appear thicker

learn Hair Multiplication

extract, clone, and reinsert your own hair cells

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Experts

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SMP Specialist
Hairo Fallas
Newark, NJ, United States

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Hairo Fallas