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    GlossaryIC50 (Inhibitory Concentration 50)

    concentration needed to inhibit a biological process by 50%

    IC50, or Half Maximal Inhibitory Concentration, is a measure used in pharmacology to indicate how much of a substance (like a drug or inhibitor) is needed to inhibit a biological process or the activity of a target (such as an enzyme or cell receptor) by 50%. This value helps researchers understand the potency of a compound, with a lower IC50 indicating a more potent inhibitor.

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      community Opinions on Scalp fibrosis and DHT?

      in Research/Science  9 upvotes 2 years ago
      The conversation discusses the theory that scalp fibrosis contributes to male pattern baldness (MPB) by increasing DHT concentration, and mentions treatments like Minoxidil. The user seeks opinions on the theory and the effectiveness of scalp massages.

      community Pyrilutamide update: three months

      in Update  30 upvotes 1 year ago
      A user's 3-month experience with pyrilutamide to reduce hair shedding, and how it may not be strong enough to stop the thinning of their hairline. Other users mentioned the effectiveness of minoxidil and finasteride for treating hair loss.

      community If RU58841 is such an effective anti androgen

      in Research/Science  46 upvotes 10 months ago
      RU58841 is discussed as a topical anti-androgen for hair loss, but its effectiveness and safety are not well-documented, leading to mixed opinions and experiences among users. Some combine it with finasteride, but concerns about side effects and lack of FDA approval limit its popularity.
      FCE 28260: A Forgotten 5α-Reductase Inhibitor

      community FCE 28260: A Forgotten 5α-Reductase Inhibitor

      in Research  330 upvotes 2 months ago
      FCE 28260 (PNU 156765), an under-explored 5α-reductase inhibitor, showcases promising results in research by Giudici et al., outperforming well-known treatments like Finasteride in reducing the conversion of testosterone to DHT. Its superior efficacy, demonstrated through lower IC50 values in both natural and human recombinant enzyme studies, suggests it could offer more effective management of DHT-related conditions. Additionally, its lower molecular weight hints at better potential for topical application, potentially offering advantages in treating conditions such as androgenic alopecia. Despite its potential, it has not advanced in development, possibly due to financial limitations, leaving its therapeutic prospects and side effect profile largely unexplored.

      community DHT and 5AR respect post, it's importance within the brain

      in Research/Science  111 upvotes 8 months ago
      The conversation discusses whether to use finasteride for hair loss, considering its role in inhibiting DHT and 5AR, which can affect brain function and mood. Some users report anxiety and depression from finasteride, while others do not experience these side effects and emphasize the importance of DHT for brain and prostate health.

      community Fats on your Head to Stop Hair Loss?

      in Research/Science  137 upvotes 8 months ago
      The conversation discusses the potential of long-chain unsaturated fatty acids, like oleic and linoleic acid, as an additional treatment for hair loss, which may inhibit the enzyme responsible for converting testosterone to DHT and promote hair growth. Users humorously suggest using oils topically and discuss other hair loss treatments, but the main focus is on the science behind fatty acids and their role in hair health.

      community Oral Minoxidil and Grapefruit Juice

      in Research/Science  96 upvotes 1 year ago
      The conversation is about the potential dangers of taking oral minoxidil and grapefruit juice together. Some users express concern about dangerous drug interactions, while others argue that grapefruit juice may inhibit the metabolism of finasteride. The conclusion is that grapefruit juice may make finasteride less effective, but it won't affect minoxidil.

      community HLT Megathread on HMI-115 (key takeaways in comments)

      in Research/Science  39 upvotes 1 year ago
      HMI-115, a newly discovered hair loss treatment that could potentially be effective for those with diffuse thinning and telogen effluvium. It is based on prolactin receptor antagonist signaling and has already undergone Phase I trials in women, with potential commercialization by 2027.

      community Physician here AMA – 30M oral Fin 1-1.25 mg daily

      in Update  47 upvotes 2 years ago
      Hair loss treatments, specifically the use of finasteride, microneedling and potentially oral minoxidil. People discussed their experiences with finasteride, its effects on sexual behaviors, as well as potential solutions such as tadalafil or using other growth factor signal peptides for hope in curing male pattern baldness.

      community Why I really believe the tension theory is the cause of MPB

      in Research/Science  70 upvotes 3 years ago
      The conversation discusses the tension theory as a cause of male pattern baldness (MPB), suggesting that scalp tension and reduced subcutaneous fat layer contribute to hair loss. Treatments mentioned include Minoxidil, finasteride, microneedling, scalp massages, and Botox.

      community Clascoterone (Winlevi) now approved in Canada

      in Product  14 upvotes 1 year ago
      The conversation is about the approval of Clascoterone (Winlevi) in Canada for hair loss treatment. One user expressed skepticism about its effectiveness due to low concentration.

      community Zix + Topical Fin : Blood Test Before/After, AMA and suggestions

      in Treatment  47 upvotes 4 years ago
      A user's plan to use Zix and topical finasteride (5AR inhibitors) for hair loss, followed by blood testing before/after. The user has suggested creating a fund to cover part of the cost of their blood tests. Replies to their post discuss the effectiveness of the treatments.

      community Topical Finasteride strength discussion

      in Research/Science  66 upvotes 9 months ago
      The conversation discusses the effectiveness of different concentrations and dosages of topical finasteride on scalp and serum DHT levels, comparing it to oral finasteride and noting the side effects seem to be fewer at lower dosages. Participants shared experiences and referenced a chart indicating similar scalp DHT reduction with 0.025% topical finasteride as with 1mg oral finasteride, but with fewer side effects.

      community What's the deal with Zinc and DHT?

      in Chat  47 upvotes 5 months ago
      The conversation discusses the conflicting information about Zinc's effect on DHT and its role in hair loss. It mentions that Zinc can act as a 5AR inhibitor at high doses but may increase DHT if taken to correct a deficiency, and highlights the importance of nutritional balance for hair health.

      community Questions about alfatradiol logistics

      in Treatment  4 upvotes 1 year ago
      The user is seeking help with using Ell-Cranell for hair loss treatment. They are unsure about the correct application method and dosage. They also inquire about combining microneedling with topical alfatradiol and question a study that referred to alfatradiol as a hair growth inhibitor in male mice.

      community Chances GT20029 releases by 2028?

      in Technology  6 upvotes 1 year ago
      The conversation is about hair loss treatments, specifically the anticipation for the release of a new treatment, GT20029, by 2028. Users are discussing their experiences with current treatments like finasteride and dutasteride, and the potential of future treatments, including FAK inhibitors and verteporfin trials.

      community Depressed that topical dut+min is causing unwanted hair everywhere on my face. Is there anything can I do?

      in Minoxidil  21 upvotes 1 year ago
      The conversation is about a user experiencing excessive hair growth on their body due to using topical minoxidil and dutasteride. The suggested solutions are shaving off the excess hair or considering laser epilation. It is mentioned that dutasteride does not cause extra hair growth, while minoxidil can stimulate hair growth in unintended areas. The user is advised to lower the dosage, concentration, or frequency of use and only apply the treatment to the desired areas.