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    GlossaryVasoconstriction

    narrowing of blood vessels due to muscle contraction

    Vasoconstriction is the narrowing of blood vessels due to the contraction of the muscular wall of the vessels, particularly the large arteries and small arterioles. This process reduces blood flow to certain areas of the body, which can help conserve heat or redirect blood to essential organs. For professionals, it's important to note that vasoconstriction is regulated by the autonomic nervous system and can be influenced by various factors, including temperature, stress, and certain medications.

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      community Does drinking coffee offset the effects of Minoxidil?

      in Minoxidil  16 upvotes 2 years ago
      The conversation discusses whether drinking coffee affects the hair growth benefits of Minoxidil, with one user mentioning that Minoxidil's vasodilation is stronger than caffeine's vasoconstriction, and another sharing personal experience of better hair growth after quitting caffeine while on Minoxidil.

      community Could coffee contribute to hair loss?

      in Research/Science  4 upvotes 4 years ago
      Coffee may negatively impact hair health due to its vasoconstrictor effects, potential to increase DHT, and interference with nutrient absorption. There is no strong clinical evidence linking caffeine to hair loss or regrowth in humans, but moderation is advised.

      community Is it Ritalin? (23 F)

      in Question  6 upvotes 6 years ago
      A user suspects Ritalin is causing hair loss due to vasoconstriction and is considering trying Ginkgo Biloba after already taking a multivitamin and hair supplement. Another user mentions experiencing hair shedding with Vyvanse and Dexedrine.

      community Topical caffeine is a common ingredient in formulas to prevent hair loss and to induce hair regrowth. (What’s your take on this?)

      in Treatment  10 upvotes 3 years ago
      The conversation discusses whether topical caffeine is effective for hair loss, with some users questioning its role due to its vasoconstrictive and vasodilative properties, while another suggests that temporary vasoconstriction might be beneficial by promoting angiogenesis. Specific treatments mentioned include caffeine shampoo, which one user believes is ineffective.

      community Why can't you drink caffeine after PRP?

      in Treatment  10 upvotes 4 years ago
      The conversation discusses avoiding caffeine after Platelet-Rich Plasma (PRP) treatment for hair loss because caffeine is a vasoconstrictor, which can reduce blood flow and hinder the healing process that PRP aims to promote.

      community Quit vaping/smoking = 80% less loss

      in Research/Science  235 upvotes 2 years ago
      Quitting vaping significantly reduced hair loss for a user who was a heavy vaper and also taking finasteride. Some participants suggest nicotine's vasoconstrictive properties may worsen hair loss, while others share personal anecdotes of hair improvement after quitting smoking or vaping.

      community Does drinking coffee have any effect on hairloss?

      in Research/Science  5 upvotes 5 years ago
      Coffee's effect on hair loss is debated, with some suggesting it may exacerbate hair loss due to vasoconstriction, while others believe it could have positive effects. Topical caffeine might be beneficial, but ingesting it could potentially inhibit vitamin D receptors.

      community Any adderall / vyvanse users here?

      in Chat  1 upvotes 2 months ago
      Adderall and Vyvanse may contribute to hair loss by stressing the dopamine system and increasing cortisol levels. Users discuss potential treatments like Minoxidil, finasteride, and RU58841 for managing hair loss.

      community Marijuana and hair loss?

       5 upvotes 9 years ago
      The conversation discusses the potential impact of marijuana on hair loss, with some users suggesting it may worsen hair loss due to hormonal changes, while others believe it might alter perception rather than cause actual thinning. The original poster uses Propecia (finasteride) and Rogaine (minoxidil) for treatment and is considering quitting marijuana to see if it affects hair health.

      community 13 months TOPICAL ONLY progress! (Diffuse thinner)

      in Update  551 upvotes 5 months ago
      The conversation is about a user's progress in treating diffuse hair thinning using a topical regimen including finasteride, minoxidil, ketoconazole, microneedling, saw palmetto, collagen, and vitamins, along with lifestyle changes. The user plans to switch from topical to oral finasteride for potentially better results.

      community How bad is nicotine when it comes to hairloss

       8 upvotes 7 years ago
      The conversation discusses the impact of nicotine and caffeine on hair loss. The user has been using finasteride, minoxidil, and nizoral for hair loss treatment and is questioning whether to stop using nicotine products.

      community On the big 6 but very slow , needs acceleration

      in Is this regrowth?  30 upvotes 10 months ago
      The user is using a hair regrowth protocol including dutasteride, topical and oral minoxidil, dermarolling, ketoconazole shampoo, and tretinoin, but is experiencing slow progress and seeks advice for faster regrowth. Suggestions include quitting smoking, adjusting the regimen, and considering additional treatments like topical finasteride or RU58841.

      community Lowering dose of Oral Minoxidil?

      in Minoxidil  108 upvotes 1 year ago
      The user plans to lower their oral minoxidil dose from 5 mg to 2.5 mg to reduce side effects like puffiness and hypertrichosis, while also using finasteride and accutane. They are considering caffeine serums for puffiness and discussing dietary changes or switching to topical minoxidil to address bloating.

      community Pills for life Dutasteride 2.5mg+5mg oral Minoxidil 🤑

      in Satire  37 upvotes 1 year ago
      The conversation discusses using Dutasteride, oral Minoxidil, and other medications for hair loss, with the user expressing satisfaction despite potential side effects. The user prefers these treatments to maintain a youthful hairline, despite others suggesting alternative methods.

      community High Nicotine use and Hair Loss

      in Chat  91 upvotes 1 year ago
      Heavy nicotine use can lead to hair thinning and loss, but quitting can reverse these effects. The user noticed significant hair regrowth after quitting vaping.

      community high bloodpressure and crown thinning in early 20s

      in Is this regrowth?  9 upvotes 1 year ago
      A user with kidney disease and high blood pressure experienced hair thinning, especially around the vertex. They are currently using finasteride and oral minoxidil but are considering whether to resume blood pressure medication despite managing symptoms with diet and exercise.

      community I feel like people here shrug off nutritional issues too quickly. Particularly for Retrograde Alopecia.

      in Chat  8 upvotes 3 years ago
      The user believes Retrograde Alopecia may be linked to vitamin imbalances, specifically from taking too much Vitamin E, A, Zinc, and Selenium, and suggests it could be a middle ground between Androgenic Alopecia and Telogen Effluvium. Treatments for hair loss mentioned include Androgen inhibitors and improving lifestyle factors like nutrition and sleep, with topical melatonin also recommended for Retrograde Alopecia.

      community Oral Castor Oil and your experience

      in Treatment  8 upvotes 3 years ago
      A user experienced significant hair shedding and thinning after using oral castor oil for hair loss. Other users suggested seeing a dermatologist and noted that castor oil is typically used for constipation.

      community 6 months on minoxidil shedding again

      in Update  266 upvotes 1 month ago
      A user experienced hair shedding after six months of using topical minoxidil and is considering adding finasteride to their routine. Many suggest that minoxidil alone is insufficient for stopping hair loss and recommend combining it with finasteride or dutasteride for better results.

      community 2 years of dut, 1 year of loss 24m

      in Progress Pictures  519 upvotes 2 months ago
      The user experienced hair regrowth with dutasteride but later lost progress despite using minoxidil foam and dermastamping. Suggestions included reducing dermastamping frequency, conducting blood tests, and considering oral minoxidil or different brands of dutasteride.

      community Topical Minoxidil since April 2025. Finasteride since Sept 2025. Bald spot has gotten larger in area size and more noticeable in recent months. Trying to be patient but situation doesn’t seem to be resolving

      in Minoxidil  8 upvotes 7 months ago
      The user has been using topical Minoxidil since April 2025 and Finasteride since September 2025, but their bald spot has worsened. They are considering switching to oral Minoxidil and have been advised to be patient, see a dermatologist, and possibly try additional treatments like derma rolling.

      community Forgotten 'Total Revival' Stack

      in Research/Science  42 upvotes 1 year ago
      Cyclosporine A is discussed as a powerful hair growth stimulant, potentially more effective than minoxidil, but concerns about safety and side effects, including cancer risk, limit its use. The conversation highlights the need for further research and experimentation with topical application, despite its risks.
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