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    Did you mean Total Internal Reflection?
    Glossary Total Internal Reflection

    light reflects entirely within a medium at a critical angle

    Total Internal Reflection (TIR) occurs when a light wave traveling through a medium with a higher refractive index (like water or glass) hits the boundary of a medium with a lower refractive index (like air) at an angle greater than the critical angle, causing the light to be completely reflected back into the original medium rather than refracting through the boundary. This phenomenon is crucial in fiber optics, where it allows light to be efficiently transmitted over long distances with minimal loss.

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      community The pessimism about the Crisp Cas 9 is excessive

       12 upvotes 11 months ago
      CRISPR Cas9 could potentially treat baldness by targeting specific genes in hair follicles without affecting other body functions. There is optimism about its future use, despite ethical concerns and the current reliance on treatments like minoxidil and finasteride.

      community Thoughts on Bryan Johnson’s new hair loss product?

       143 upvotes 11 months ago
      Bryan Johnson's new hair loss product, which includes peptides, is viewed skeptically by many, with concerns it may be a money grab rather than an effective treatment. Most users prefer proven treatments like finasteride and minoxidil, which are cheaper and have established results.

      community hairloss in my 20s has ruined my life.

      in Research/Science  373 upvotes 1 year ago
      A person in their 20s is struggling with hair loss, using treatments like minoxidil and finasteride. Suggestions include self-improvement, therapy, hair transplants, and focusing on acceptance and confidence.

      community Regrowth from massage, update and integration

       2 upvotes 1 year ago
      The conversation discusses using scalp massage, balms like Ethera and L'Occitane, and dietary changes such as rosemary tea and tofu to address hair loss. The user is also considering high-intensity interval training and slow breathing to improve hair regrowth.

      community Is this range of DHT high? Will taking finasteride help further?

       12 upvotes 2 years ago
      Finasteride can reduce DHT levels by about 60%, but its effectiveness varies, and some users experience side effects like cognitive issues. Combining finasteride with other treatments like dutasteride or minoxidil may enhance hair regrowth, but individual responses differ.

      community Minoxidil (5% Rogaine foam) 0.5 Dutasteride

       16 upvotes 9 months ago
      A user shared their hair loss experience and treatment routine, which includes using Minoxidil (5% Rogaine foam) and Dutasteride 0.5, along with various supplements and natural oils. They reported positive results and emphasized the importance of liver health and thyroid function, despite skepticism from others about the effectiveness of supplements.

      community Hair and plants analogy and dht (serious)

       2 upvotes 5 months ago
      Hair loss may be linked to DHT, which can both suppress and increase inflammation, potentially as a defense mechanism. Treatments like Minoxidil, Finasteride, and RU58841 are discussed, but the exact cause of hair loss remains unclear.

      community Post op day 1, My 10 year journey and thoughts about hair loss, advice

       6 upvotes 9 months ago
      The user shared their 10-year hair loss journey, discussing treatments like oral minoxidil, oral finasteride, and LLLT, and ultimately deciding on a hair transplant. They also explored the possibility of having alopecia areata incognita and advised seeking multiple opinions before surgery.

      community 5 months since I became obsessed with my hair

      10 months ago
      The user is experiencing hair regrowth and increased hair thickness after using supplements like biotin, zinc, selenium, and a complex with various natural ingredients, along with topical caffeine. They are considering using topical minoxidil and mesotherapy in the future.

      community Thoughts on Lactobacillus Reuteri 6475?

       4 upvotes 1 year ago
      Lactobacillus reuteri 6475 is being used by a person who reports healthier hair after one month, despite initial shedding. The discussion includes speculation about its effects on gut bacteria and scalp inflammation.

      community is topical finasteride even legit?

      in Treatment  2 upvotes 5 years ago
      Topical finasteride is considered effective by some users, with reports of good results and fewer side effects compared to oral finasteride. Users discuss mixing crushed pills for topical use and obtaining prescriptions, though cost and insurance coverage can be issues.

      community 22M , A year of progress on finesteride

       39 upvotes 1 month ago
      A 22-year-old male experienced progress with 0.5 mg daily finasteride for hair loss but noticed recent shedding, which may be a synchronized shed. Users suggest continuing the current dose, considering increasing to 1 mg, or exploring additional treatments like GHK-cu, while noting that watery semen is a common side effect.

      community Reduced excessive hair shedding

       193 upvotes 2 months ago
      Scalp microneedling with Exohealer significantly reduced hair shedding for the user. The treatment was done at Seoul Forena Clinic.

      community Where can you find RU 588441 for cheap ?

      in Chat  2 upvotes 8 months ago
      The conversation is about finding affordable RU58841 for hair loss treatment. Suggestions include buying it in powder form and making a solution at home, with Amazon as a potential source.

      community Why I never used Fin, Min, Or Dut and Rebuilt My Scalp From the Ground Up (Real Results)

      in Treatment 3 weeks ago
      The conversation discusses a natural approach to hair loss treatment, emphasizing a diet rich in whole foods, supplements like Saw Palmetto, Zinc, and Pumpkin Seed, and mechanical scalp stimulation with microneedling, avoiding pharmaceuticals like finasteride, minoxidil, and dutasteride. The user claims success with this holistic method, reporting new hair growth and improved overall health.

      community Vellus/miniaturized hair - when are they really too miniaturized to regrow?

       16 upvotes 3 weeks ago
      Miniaturized hair can potentially regrow unless the follicle is destroyed, with treatments like finasteride, minoxidil, and lifestyle changes playing a significant role. Some users report success with additional treatments like estrogen, ketoconazole, and derma stamping, emphasizing the importance of routine and overall health.

      community No longer have drive in the gym

      in Chat  8 upvotes 4 months ago
      The user lost gym motivation after taking finasteride for four months, possibly due to its effect on DHT levels. Suggestions include adjusting dosage, trying topical treatments, using caffeine, checking testosterone levels, and considering supplements like SSRIs or pregnenolone.
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